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HomeMy WebLinkAbout2023-07-31 Study Session•":•� Council Study Session Agenda ASHLAND CITY COUNCIL STUDY SESSION AGENDA Monday, July 31, 2023 Council Chambers,1175 E Main Street View on Channel 9 or Channels 180 and 181 (Charter Communications) or live stream via rvtv.sou.edu select RVTV Prime. HELD HYBRID (In -Person or Zoom Meeting Access) Public testimony will be accepted for both general public forum items and agenda items. Please complete the online Public Testimony Form, for WRITTEN and ELECTRONIC testimony only. Indicate on the Public Testimony Form if you wish to provide WRITTEN testimony, or if you wish to speak ELECTRONICALLY during the meeting. Please submit your testimony no later than 10:00 a.m. the day of the meeting. 5:30 p.m. City Council Study Session 1. Public Input (up to 15 minutes) 2. DEQ Croman Mill Redevelopment Update 3. Enterprise Funds Ending Balance Report 4. Adjournment of Study Session In compliance with the Americans with Disabilities Act, if you need special assistance to participate in this meeting, please contact the City Manager's office at 541.488.6002 (TTY phone number 1.800.735.2900). Notification 72 hours prior to the meeting will enable the City to make reasonable arrangements to ensure accessibility to the meeting (28 CFR 35.102-35.104 ADA Title 1). Page 1 of 1 ®$ �:►� Council Study Session July 31, 2023 Agenda Item Croman Mill Sampling Results Update Brandon Goldman, AICP Community Development Director From Derek Severson Planning Manager 13randon.goldrnan(@ashland.or.us 541-552-2076 Contact Derek.severson(Lbashland.or.us Item Type Requested by Council M Update ® Request for Direction ❑ Presentation SUMMARY On -site sampling at the Croman Mill site was conducted on May 2, 2023, by the property owners' environmental consultants. The Oregon Department of Environmental Quality (DEQ) was on hand to oversee that sampling work and to answer questions from interested citizens, staff, and Council members. At that time, in response to City requests, DEQ representatives said they would make themselves available for the July 31, 2023, Council study session to discuss preliminary results and next steps. POLICIES, PLANS & GOALS SUPPORTED The Croman Mill District (CMD): CMD currently includes five zones, Compatible Industrial (CM -CI), Mixed Use (CM -MU), Neighborhood Center (CM -NC), Office Employment (CM -OE), and Open Space/Conservation (CM -OS) and is regulated as a special district within Ashland's Land Use Ordinance (chapter 18.3.2). Townmakers LLC has expressed interest in acquiring the property for redevelopment, and the city is currently analyzing the property's potential for designation as a Climate Friendly Area (CFA) under the state's new Climate Friendly and Equitable Communities (CFEC) rules. Cleanup of the property is the necessary first step for any sort of redevelopment to move forward. BACKGROUND AND ADDITIONAL INFORMATION The Oregon Department of Environmental Quality (DEQ) serves as the regulatory agency responsible for overseeing the voluntary cleanup of the former Croman Mill site. It is important to note that the City of Ashland does not possess review or approval authority over the cleanup plan. In response to the significant public interest in the site and project, DEQ has furnished this update at the City's request, demonstrating their commitment to transparency and accountability in addressing the environmental concerns related to the site. Testing supervised by the Oregon Department of Environmental Quality (DEQ) on the week of May 5th at the former Croman Mill site revealed the presence of diesel and oil -range hydrocarbons in groundwater and pondwater, exceeding safe drinking water limits. Some shallow soils contained dioxins and furans above acceptable levels, while other soil detections were generally within permissible limits, with a few exceptions. In communications with Planning staff, Anthony B. Chavez, RG, the Project Manager/Geologist for Western Region Environmental Cleanup & Emergency Response with the Oregon DEQ, provided the following initial summary of the results: Page 1 of 3 �r •::� Council Study Session • Diesel and oil -range hydrocarbons were present in groundwater and pondwater exceeding DEQ's residential drinking water threshold of 100 parts per billion (ppb). The highest detection was 1,100 ppb from the pond. Groundwater had up to 720ppb oil. Other tested compounds in groundwater and pondwater were found below DEQ risk thresholds. Generally, this type of groundwater contamination is not considered "risky" when municipal supplies are available for consumption. The pond may need to be evaluated for potential ecological concerns. • Dioxins and furans were found in shallow soils (0-6 inches) at a few locations above DEQ risk levels. The highest concentration was found at the south wood burner, location DU03 at 152.5 parts per trillion (ppt). Expected screening levels for dioxin in shallow soil will be future residential (4.7ppt), urban residential (12ppt), occupational workers(16ppt), construction workers (170ppt), and excavation workers (4,800ppt). For the planned mixed -use development, the dioxin needs to meet the residential standards. This can be done either by direct removal and sampling confirmation or by covering with clean fill and maintaining a minimum 3-foot layer thickness. Except for oil and benzo(a)pyrene detections (2,200 parts per million [ppm] and 160ppm respectively) from shallow soil at the maintenance shop at DU06, remaining soil detections are below DEQ thresholds. DEQ's residential thresholds for oil and benzo(a)pyrene are 1,100ppm and 0.11ppm, respectively. To address the identified contamination, SCS Engineers, Environmental Consultants and Contractors, will develop a work plan for DEQ's approval. This plan will include targeted soil removal, confirmation soil sampling, and additional shallow soil sampling to assess potential offsite contaminant migration. Moreover, surrounding areas of the planned excavation will undergo further sampling to determine the extent of the contamination. FISCAL IMPACTS At this stage, fiscal impacts associated with site cleanup for the city are largely limited to the city staff time involved in continuing to work with the property owners, potential developers, neighbors and the DEQ. DISCUSSION QUESTIONS DEQ representatives will be available for this Council study session to address questions the Council may have regarding the test results and next steps including developing a cleanup workplan under DEQ's voluntary cleanup program. Some potential questions include: • Do these preliminary results necessitate rescinding, suspending, or amending the existing grading permit that has allowed the property owners to remove stockpiled materials from the site in preparation for redevelopment? The property owners have indicated to DEQ that no materials, except for some asphalt and solid waste, have left the site for several months, and that they will provide notice to the city prior to any other materials, such as wood waste, going off -site. • Given the preliminary results and the site's history of frequent trespassing complaints, do current site fencing and signage provide adequate protection from "trespasser risk"? In staff's Page 2 of 3 .'":•� Council Study Session assessment, existing security measures are insufficient to prevent access by dogwalkers and campers who frequently enter the property without permission. Some questions asked by staff and answered by DEQ are included as Attachment #3. REFERENCES & ATTACHMENTS Attachment #1: Preliminary Report of Test Results from SCS Engineers Attachment #2: Sampling Map (Figure 4-1) Attachment #3: Staff Questions/DEQ Responses Page 3 of 3 ln`' Environmental Consultants & Contractors June 19, 2023 File No. 04222021.00 MEMORANDUM TO: Anthony Chavez, RG, Oregon Department of Environmental Quality FROM: Barbara E. Lary, RG, SCS Engineers Shane D Latimer, PhD, SCS Engineers SUBJECT: Croman Mill Site, Ashland, Oregon - ECSI #535 Site Investigation Data On behalf of the Dwain and Bud, LLC, SCS Engineers is forwarding analytical data from the site investigation conducted during the week of May 5, 2023 at the former Croman Mill Site at 146 Mistletoe Road in Ashland, Oregon (Figure 1), per the DEQ-approved Work Plan'. Results are summarized in attached Tables 1(water) and 2 (soil). Laboratory reports are included as Attachment 2. Preliminary results are compared to the Oregon Department of Environmental Quality (DEQ) Risk Based Concentrations as published in tables dated May 2018, amended June 2023. GROUNDWATER AND SURFACE WATER SAMPLES Of the seven borings completed on the subject property, two encountered groundwater, which was sampled and analyzed (602 and B03). Two surface water samples collected from the pond were also analyzed. Results from all four samples are summarized in Table 1 and are compared to residential and occupational ingestion and inhalation from Tap Water. Only petroleum hydrocarbons in the diesel and motor oil range had concentrations that exceed listed screening values in all four samples. SOIL AND SEDIMENT SAMPLES Soil samples were collected from borings B02 and B03, where groundwater was collected, at a depth just above the water table. The depth in feet below ground surface is indicated in the sample name. In addition, incremental sampling methodology (ISM) was used to collect soil samples from decision units (DUs) defined in the Work Plan. Results are listed in Table 2, along with the Risk - Based Concentrations (RBCs) for residential, occupational, and excavation worker. Soil concentrations that exceed residential RBCs (the most conservative of the three) include petroleum hydrocarbons in heavy oil range collected on the north side of the maintenance shop and 1 SCS, 2023. Revised Site Investigation Work Plan, Croman Mill Property, 146 Mistletoe Road, Ashland, Oregon, Oregon DEQ ECSI No. 535, February 25. 15940 SW 72nd Avenue, Portland, Oregon 97224 1 503-639-9201 1 eFax 503-684-6948ID MEMORANDUM June 19, 2023 Page 2 benzo(a)pyrene collected from the east side of the maintenance shop. Concentrations for both samples are below RBCs for occupational and excavation worker. DIOXIN AND FURAN RESULTS Dioxins and furans were encountered in DUO1, DU02, DU03 and DU05. Laboratory results are reported as concentrations for individual dioxin and furan congeners. SCS used the EPA Basic KM TEQ and ISM UCL Calculator (which uses the 2005 World Health Organization TEFs) to calculate TCDD Toxicity equivalence (TEQ) for each ISM sample to facilitate comparison with the DEQ RBC for 2,3,7,8-TCDD (dioxin) equivalent. Non -detect values (U-flag) were replaced with the method reporting limit values and estimated (J-flag) values are used, as estimated, for the calculations. Resulting TEQs are compared to the DEQ TCDD equivalent RBC of 0.0000047 mg/Kg (4.7 pg/g). The preliminary summary table lists TEQs for samples analyzed, which include the former dip tank site, both former wood burner sites, and sediments from the pond. Since triplicates were collected at DUs including the dip tank area (DUO1) and wood burner area (DU03), the three resulting TEQs are then used to calculate a 95% upper confidence interval (UCL) and an average for the three values. Dioxin TEQ results are highest for the wood burner samples, with values approximately two orders of magnitude above the DEQ RBC for residential receptors. The dip tank TEQ was one order of magnitude above the RBC. TEQs for pond samples are estimated values, which is the case when there is a large fraction of non -detects (73%) in the sum. Based on these results, it appears that the soils from the area of the former wood burners and dip tank are impacted with dioxins/furans above the level of residential and occupational receptors, although below the RBC for an excavation worker. INTERIM REMEDIAL OPTIONS Sample areas were selected based on knowledge of site operations and historical aerial photographs with mill buildings and visible equipment. Lateral extent of sample areas was selected to be slightly larger than the estimated operational area for each DU to help ensure the entire potentially impacted area was included in the sample. However, since just the top six inches of soil was sampled, the vertical extent of impacts has not been thoroughly delineated. SCS is assisting stakeholders in determining potential disposal options for impacted soils. Given the potential proposed mix of residential, commercial, and/or light industrial uses of the site, as well as heightened community interest, removal of impacted soils to an approved land disposal location is currently the favored alternative. The most contaminated samples have a 95%UCL concentration of 0.0002678 mg/Kg TEQ TCDD and may qualify for land disposal since it is less than the as -generated waste treatment standard for TCDDs of 0.001 mg/Kg2. These soils may also qualify for a DEQ "No Longer Contained -In Determination" since concentrations are so low. Additional soil sampling and analytical testing will be required to delineate and further characterize impacts. 2 USEPA, 2011. Fact Sheet on the Management of Dioxin Contaminated Soils, May 9. MEMORANDUM June 19, 2023 Page 3 Attachment 1 - Summary Tables of Preliminary Data - Groundwater and Soil Attachment 2 - Laboratory Reports Attachment 1 Summary Tables of Preliminary Data Table 1. Preliminary Summary of Groundwater and Surface Water Analytical Results Croman Site, Ashland, OR DEQ RBC DEQ RBC DEQ Chronic DEQ Chronic DU05-SU05- DU05-SU05- Screening Screening Screening Screening Sample ID B02-15GW B03-19GW 230505-Pond01 230505-Pond02 Levels Levels Values Values GW from GW from Area of the Site temporary boring north Pond water Pond water Residential Occupational Residential Commercial boring near of former DS ( ) DS ( ] WI ( ' WI ( ] pump USTs NWTPH- Gx, Dx (N /L) gasoline 501.1 50U 50U 50U 110 120 520 Diesel 230 250 590 600 J"450 00 0 400 1700 Motor Oil 420 720 1100 1100 100 430 400 1700 RCRA 8 Metals dissolved /L) Silver IOU IOU 100 820 NV NV arsenic 15 U 15 U 0.052 0.31 NV NV Barium 57 40 4000 33000 NV NV Cadmium 0.29 J 0.19 J 20 160 NV NV Chromium 1.8 J 1.1 J - - NV NV Lead 9.0 U 9.0 U 9.0 U 9.0 U 15 15 NV NV Selenium 20 U 20 U - I - NV NV PAHs /L 2-Methylnaphthalene 0.065 J 0.03 J 0.1 U 0.11 U - - NITI NITI Acenaphthene 0.081 J 0.032 J 0.0089 J B 0.11 U 510 2500 NITI NITI Acenaphthylene 0.094 U 0.017 J 0.0061 J B 0.11 U - - - - Benzo[a]anthracene 0.094 U 0.098 J 0.033 J B 0.11 U 0.03 0.38 190 2300 Benzo[a]pyrene 0.094 U 0.09 J 0.1 U 0.11 U 0.025 0.47 NV NV Benzo[b]fluoranthene 0.094 U 0.1 0.1 U 0.11 U 0.25 >S NV NV Benzo[g,h,i]perylene 0.094 U 0.1 0.1 U 0.11 U - - - - Benzo[k]fluoranthene 0.094 U 0.096 J 0.025 J 8 0.11 U >S >S NV NV Chrysene 0.094 U 0.1 0.1 U 0.11 U >S >S NV NV Dibenz(a,h)anthrocene 0.094 U 0.094 J 0.1 U 0.11 U 0.025 0.47 NV NV Fluoranthene 0.094 U 0.096 J 0.1 U 0.11 U >S >S NITI, NV NITI, NV Fluorene 0.094 0.034 J 0.1 U 0.11 U 280 1300 NITI NITI Indeno[1,2,3-cd]pyrene 0.094 U 0.097 J 0.1 U 0.11 U >S >S NV NV Naphthalene 0.049 J 0.1 U 0.1 U 0.11 U 0.17 0.72 11 50 Phenanthrene 0.049 J 0.063 J 0.1 U 0.11 U - - - - Pyrene 0.094 U 0.096 J 0.1 U 0.11 U 110 >S NITI NITI Anthracene 0.094 U 0.055 J 0.1 U 0.11 U >S >S NITI NITI 1-Meth Ina hthalene 0.058 J 0.027 J 0.1 U 0.11 U - - NITI NITI VOCs /L Acetone 40 15 U 1 1 J 6.7 J -- --- NITI NITI Toluene 1.0 U 0.33 J 1.4 1.0 U 1 100 6300 36000 150000 Notes: GW = groundwater pg/L = micrograms per liter DS =ingestion or inhalation from tap water. WI = groundwater volatilization to indoor air analyses not performed 230 = above the DEQ RBC for this analyte J = estimated concentration above detection limit but below the method reporting limit U = not detected above the MRL shown. B = analyte detected in the sample and the laboratory blank. NITI = no inhalation toxicity NV = not volatile - = RBC not listed for this analyte >S = The groundwater RBC exceeds the solubility limit. Oregon RBCs from "Risk Based Concentrations for Individual Chemicals, Revision May 2018 and amended June 2023. Volatilization to indoor air screening values from the June 2023 DEQ Table 1. Chronic and Acute Vapor Intrusion Risk -Based Concentrations. SCS n Preriminary Resultsxlsx 6/16/2016/2023 Table 2. Preliminary Summary of Analytical Results from Soil and Sediment Samples Croman Site, Ashland, Oregon Sample ID B02-8 B03.17 DUO1- 230504- 0.5 DUO1- 230504- 0.5 REPI DUO1- 230504- 0.5 REP2 DU02- 230504- 0.5 DU03- 230505- 0.5 230505- 0.5- REPI DU03- 230505- 0.5-REP2 DU04-SUO1- 230504-0.5 DU04-SU02 230504.0.5 DUOS-SUO6- 230505- COMPOI DU05-SUD6 230505- COMPO2 DUO6-SUO3- 230504.0.5 DUO6-SUO4- 230505-0.5 DU07- 230502- FIR DU07- 230502- Native DEQ RBC DEQ RBC screening Screening Level Level DEQ RBC Screening Level Area of the Site Temporary boring NW or to., u57s Temporary boring near pump Wood treatment Dip conk wood treatment Dip conk Wood treatment DiD Took North Wood Burner South Wood Burner South Wood Burner South Wood Burner Veneermill- east Veneer Mill south Pond Sediments Pond Sediments Mdnfenmce Shop - north Maintenance Shop -East North Landfill Area North Landfill Area Residential Occupational )DC) )OC) Excavation Worker (DC) NWTPH- Gx, Dx (mg/Kg) gasoline GRO 5.9 U 66 190 6.2 U 58 U 28 J 15 J 180 16 J 200 15 J 190 12 J 110 35 J 360 27 J 300 35 J 360 56 350 7.1 U 22 J 310 8.4 U 18 J 240 280 2200 62 360 48 U H 41 J H 49 U H 49 U H 1200 1100 1100 20000 14000 14000 > Max > Max > Max Diesel DRO hear oil RRO RCRA 8 Metals (mg/Kg) SilverE Arsenic2.3 Barium51 Cadmium0.038 Total Chromium12 Lead5.2 0.8 U J B 0.71 U 2.3 56 0.035 J 13 B 4.8 13U 0.061 0.73 2.2 53 0.37 U 11 B 4.2 1.3U 0.04 0.76 U 2.9 110 0.058 J 22 B 11 1.4U 0.039 0.68 U 2.2 75 0.047 J 15 B 8.2 1.2U 0.12 0.76 U 2.3 95 0.046 J 18 B 7.5 1.4U 0.089 0.72 U 2.3 98 0.059 J 18 B 8.7 1.3U 0.097 9� J.0_ 0.89 U 1.1 J 44 0.45 U 7.6 4.3 1.6U 0.013 J 0.87 U 1.5 J 57 0.43 U 11 5.9 1.6U 0.014 J 0.72 U 2.2 57 0.13 J 14 B 20 1.3U 0.049 0.67 U 23 49 0.11 J 21 B 20 1.2U 0.043 0.75 U 4.9 2DO 0.045 J 31 B 9.4 13U 0.057 0.73 U 2.3 81 0.37 U 20 B 3.4 - 1.3U 0.019 390 0.43 15,000 78 - 400 - 23 5800 1.9 220,000 1100 - 800 - 1 350 49000 420 >Max 9700 - BOO - 2900 Selenium1.4U Total Mercu0.036 PAHs /K -Meth Ina hthalene 4.4 J 33 U 33 U 33U 5.5 J 9.6 J 33 U 33 U 8.2 J 33 U 7.3 J 33 U 33 U 5.4 J 11 J 33 U 33 U 2.7 J 34 U 34 U 34 U 34U 34 U 34 U 34 U 34 U 34 U 34 U 34 U 34 U 34 U 11 J 34 U 34 U 34 U 1 34 U 330 U 330 U 330 U 36J 90 J 200 J 330 U 330 U 36 J 330 U 330 U 330 U 330 U 330 U 330 U 29 J 330 U 330 U 320 U 320 U 32D U 22J 76 J 170 J 32D U 320 U 320 U 320 U 320 U 320 U 320 U 320 U 320 U 20 J 320 U 320 U 330 U 330 U 330 U 32J 87 J 200 J 330 U 330 U 32 J 330 U 330 U 330 U 330 U 330 U 330 U 25 J 330 U 330 U 1.9 J IOU 1.7 J 10U . 2.6 J 2.9 J 2.7 J IOU 3.2 J IOU 5.8 J IOU 2.2 J 7.5 J 7.7 J 4.7 J IOU 1.3 J 4.8 J 9.7 U 9.7 U 2.8J 9.7 U 4.8 J 2.2 J 9.7 U 5.6 J 9.7 U 6.5 J 2-9 J 9.7 U 20 17 4.2 J 2 J 3.1 J 3.8 J 9.9 U 9.9 U 3.2J 9.9 U 3.7 J 2.3 J 9.9 U 5.6 J 9.9 U 7.7 J 2.4 J 9.9 U 17 15 6.4 J 9.9 U 2.3 J 5.4 J IOU IOU IOU IOU 3.6 J IOU IOU 4.5 J IOU 7.7 J 2.9 J 10 U 22 17 6 J 10 U 3.6 J 16 6.6 J 9.9 U I A 1 9.9 U 9.9 U 9.9 U 9.9 U 3.7 J 9.9 U 14 4.5 J 9.9 U 10 26 8.9 J 9.9 U 7.9 J 3.7 J 35 U 35 U 35U 35 U 35 U 34 J 35 U 9.8 J 35 U 24 J 9.1 J 28 J 8.6 J 22 J 10.1 35 U 1 1.9 J 4.4 J 35 U 35 U 35U 35 U 12 J 40 35 U 35 U 35 U 24 J 3.9 J 29 J 9.9 J 23 J 9.6 J 35 U 1 2.4 J 14 2.8 J 3.3 J 8.5J 8.4 J 15 13 3.5 J 17 IOU 17 10 U 8.9 J 8 J 20 24 8.1 6.6 J 8.2 J 6.3 J 3.3 J 140 160 210 92 76 170 29 180 8.2 J 97 17 78 180 21 I 4 J 1 J 9.9 U 9.9 U 2.7J 2.6 J 4.7 J 2.5 J 9.9 U 4 U 9.9 U 4.5 J 9.9 U 9.9 U 1.8 J 3.4 J 3.9 J 9.9 U 1 0.62 J 10 U 10 U IOU IOU IOU IOU IOU IOU IOU IOU IOU IOU IOU 1.1 J IOU IOU IOU I 10 U - 4,700,000 - - 110 1100 - >Csat >Csat 110 >Csat >Csat 1,100 5,300 - >Csot >Csai 70,ODO,000 - - 2100 21000 >Csat >Csat 2100 >Csat >Csat 21,000 23,ODO - >Csat >Csat 590,000,000 - - 490,000 4,900,000 >Csat >Csat 490,000 >Csat >Csat 4,900,000 >Csat - >Csat >Max cena hthene cena hth lene Benzoaanthracene Benzo[olpvrene Benzo b fluoranthene Benzo[g,h,ilperylene Benzo k fluoranthene Chrysene Dibenz a,h anthracene Fluoranthene Fluorene Indeno 1,2,3-cdl Pvrene Naphthalene Phenanthrene P rene nthrocene 1-Meth Ina hthalene PCBs /K total PCBs 40 J I 92U/64U 1340 U/240 U 040 U/240 91U/64U 1 90U/63U 87U /61U 92U/65U 230 1 590 1 140,000 SVOCs /K Remaining SVOCs ND ND ND Dioxins and Furans / ,3,7,8-TCDD equivalent 23.60 39.97 20.65 146.3 122.2 152.5 24.77 6.82 J 6.91 J 4.7 16 4800 5%UCL 54.27 28.1 267.8 99.8 Average Notes: DC = dermal contact, Inhalation, ingestion DUO1 analyzed for full list of SVOCs, which includes PAHs, by EPA 8270D. Elevated reporting limits due to the method. .analyses not performed J = estimated concentration above detection Omit but below the method reporting Omit. H = ssomple analyzed past holding time; B = onalyte detected in the sample and the laboratory blank. mg/Kg = milligram per kilogram; pg/Kg = microgram per kilogram; pg/g = picogram per gram ND = not detected above the laboratory method detection Omit U = not detected above the MRL shown. MRL = method reporting Omit 160 = above the DEQ RBC for this analyte - = RBC not listed for this anatyte >Csat = This soil RCB exceeds the limit of three-phase equipObrium patritioning. 0 concentrations greater than Csat, then free product is present. >Max = This constituent RBC for this pathwasy is greater than 1,000,000 mg/Kg, therefore is deemed not to pose a risk in this scenario. Oregon RBCs from "Risk Based Concentrations for Individual Chemicals, Revision May 2018 and amended June 2D23. Preliminary Resuli-h, Page I of 2 6/19/2023 Table 2. Preliminary Summary of Analytical Results from Soil and Sediment Samples Croman Site, Ashland, Oregon Sample ID Clean Fill and/or Background Metals (Cascade Range) Area of the Site Clean FIII N WTPH-Gx, Dx rn /K gasoline GRO Diesel DRO heavy oil RRO RCRA B Metals (mg/Kg) Silver 0.17 19 630 0.54 200 34 0.52 0.24 Arsenic Barium Cadmium Total Chromium Lead Selenium Total Mercuryl PAHs /K 2-Meth Ina htholene 110D0 250 120000 730 110 1100 25000 11000 3100 110 10000 3700 1100 77 5500 10000 6800 360 Acena hthene Acena hth lene Benzo a anthracene Benzo aIpyrene Benzo b fluoranthene Benzo[g,h,ilperylene Benzo k fluoranthene Chrysene Dibenz a,h anthrocene Fluoranthene Fluorene Indeno[1,2,3-cdlpyrene Naphthalene Phenanthrene P rene nthracene 1-Meth Ina hthalene PCBs /K total PCBs 23D SVOCa /K Remaining SVOCs Dioxins and Furans / 2,3,7,8-TCDD equivalent 0.29 95`oUCL vera e SCS Engineers Preliminary ResWts.xk>< Attachment 2 Laboratory Reports tiff eurofins Environment Testing I ANALYTICAL REPORT PREPARED FOR Attn: Ms. Barbara Lary SCS Engineers 15940 SW 72nd Avenue Portland, Oregon 97224 Generated 6/1/2023 2:20:11 PM JOB DESCRIPTION Croman Mill Site, Ashland, Oregon JOB NUMBER 280-176200-1 This report may not be reproduced except in full, and with written approval from the laboratory. The results relate only to the samples tested. For questions please contact the Project Manager at the e-mail address or telephone number listed on this page. The test results in this report relate only to the samples as received by the laboratory and will meet all requirements of the methodology, with any exceptions noted. This report shall not be reproduced except in full, without the express written approval of the laboratory. All questions should be directed to the Eurofins TestAmerica Project Manager. �- Generated 6/1/20232:20:11 PM Authorized for release by Matthew Gardner, Project Manager I Matthew.Gardner�et.eurofinsus.comet.eurofinsus.com (303)736-0100 Eurofins Denver is a laboratory within TestAmerica Laboratories, Inc., a company within Eurofins Environment Testing Group of Companies Page 2 of 160 6/1/2023 Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Laboratory Job ID: 280-176200-1 Table of Contents Cover Page .............................................. 1 Table of Contents ......................................... 3 Definitions ............................................... 4 Case Narrative ........................................... 6 Detection Summary ........................................ 11 Method Summary ......................................... 19 Sample Summary ......................................... 20 Client Sample Results ...................................... 21 Surrogate Summary ....................................... 61 QC Sample Results ........................................ 66 QC Association ........................................... 121 Chronicle ................................................ 133 Certification Summary ...................................... 142 Chain of Custody .......................................... 143 Receipt Checklists ......................................... 152 Field Data Sheets ......................................... 155 1�1 Eurofins Denver Page 3 of 160 6/1/2023 Definitions/Glossary Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon Qualifiers GC/MS VOA Qualifier Qualifier Description F1 MS and/or MSD recovery exceeds control limits. F2 MS/MSD RPD exceeds control limits J Result is less than the RL but greater than or equal to the MDL and the concentration is an approximate value. GC/MS Semi VOA Qualifier Qualifier Description LCS and/or LCSD is outside acceptance limits, low biased. '+ LCS and/or LCSD is outside acceptance limits, high biased. B Compound was found in the blank and sample. F1 MS and/or MSD recovery exceeds control limits. F2 MS/MSD RPD exceeds control limits J Result is less than the RL but greater than or equal to the MDL and the concentration is an approximate value. Si- Surrogate recovery exceeds control limits, low biased. GC Semi VOA Qualifier Qualifier Description F1 MS and/or MSD recovery exceeds control limits. F3 Duplicate RPD exceeds the control limit H Sample was prepped or analyzed beyond the specified holding time. This does not meet regulatory requirements. J Result is less than the RL but greater than or equal to the MDL and the concentration is an approximate value. Metals Qualifier Qualifier Description B Compound was found in the blank and sample. J Result is less than the RL but greater than or equal to the MDL and the concentration is an approximate value. Glossary Abbreviation These commonly used abbreviations may or may not be present in this report. o Listed under the "D" column to designate that the result is reported on a dry weight basis %R Percent Recovery CFL Contains Free Liquid CFU Colony Forming Unit CNF Contains No Free Liquid DER Duplicate Error Ratio (normalized absolute difference) Dil Fac Dilution Factor DL Detection Limit (DoD/DOE) DL, RA, RE, IN Indicates a Dilution, Re -analysis, Re -extraction, or additional Initial metals/anion analysis of the sample DLC Decision Level Concentration (Radiochemistry) EDL Estimated Detection Limit (Dioxin) LOD Limit of Detection (DoD/DOE) LOQ Limit of Quantitation (DoD/DOE) MCL EPA recommended "Maximum Contaminant Lever' MDA Minimum Detectable Activity (Radiochemistry) MDC Minimum Detectable Concentration (Radiochemistry) MDL Method Detection Limit ML Minimum Level (Dioxin) MPN Most Probable Number MQL Method Quantitation Limit NC Not Calculated ND Not Detected at the reporting limit (or MDL or EDL if shown) NEG Negative / Absent POS Positive / Present PQL Practical Quantitation Limit PRES Presumptive Eurofins Denver Page 4 of 160 6/1/2023 F 13 Definitions/Glossary Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Glossary (Continued) Abbreviation These commonly used abbreviations may or may not be present in this report. QC Quality Control RER Relative Error Ratio (Radiochemistry) RL Reporting Limit or Requested Limit (Radiochemistry) RPD Relative Percent Difference, a measure of the relative difference between two points TEF Toxicity Equivalent Factor (Dioxin) TEQ Toxicity Equivalent Quotient (Dioxin) TNTC Too Numerous To Count Job ID: 280-176200-1 03� Eurofins Denver Page 5 of 160 6/1/2023 Case Narrative Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Job ID: 280-176200-1 Job ID: 280-176200-1 --- _ --- _ - Laboratory: Eurofins Denver Narrative Job Narrative 280-176200-1 Comments No additional comments. Receipt The samples were received on 5/9/2023 9:15 AM. Unless otherwise noted below, the samples arrived in good condition, and where required, properly preserved and on ice. The temperatures of the 2 coolers at receipt time were 0.80 C and 1.40 C. Receipt Exceptions The following samples were received outside of holding time: B03-17 (280-176200-7) and B02-8 (280-176200-8). The DI Terracores were received outside the 48 hour freezing time. Per client request, method 8260 in which these containers were for, were cancelled for these samples. The Terracores for the following samples were received with client labels on them: DU05-SU06-230505-COMP01 (280-176200-3), DU05-SU06-230505-COMP02 (280-176200-4), B03-17 (280-176200-7) and B02-8 (280-176200-8). GC/MS VOA Method 8260D: The continuing calibration verification (CCV) associated with batch 280-612584 recovered outside the control limit of 20%D for Dichlorodifluoromethane (-29.2%D). This analyte is a poor performer. The LCS/LCSD recovered within control limits therefore the data were reported. Method 8260D: The matrix spike duplicate (MSD) recoveries for analytical batch 280-612584 were outside control limits for one or more analytes. See QC Sample Results for detail. Sample matrix interference and/or non -homogeneity are suspected because the associated laboratory control sample (LCS) recovery is within acceptance limits. Method 8260D: The following compounds were outside control limits in the continuing calibration verification (CCV) associated with batch 280-612565: 1,4-dioxane (-22%D, limit 20%D), and 1,2,3-trichlorobenzene (-25%D, limit 20%D). This is considered a poor performer and is within control limits in the LCS and LCSD. Method 8260D: The method requirement for no headspace was not met. The following volatile sample was analyzed with headspace in the sample container: B03-19GW (280-176200-5). Method 8260D: The continuing calibration verification (CCV) associated with batch 280-612891 recovered outside the control limit 20%D for Bromomethane(-23.1 %D) and Dichlorodifluoromethane (-21.8%D). These analytes are considered poor performing compounds. The LCS/LCSD recovered within control limits therefore the data were qualified and reported. Method 8260D: For Method 8260, the matrix spike / matrix spike duplicate / sample duplicate (MS/MSD/DUP) precision for analytical batch 280-612868 was outside control limits for 1,2,3-Trichlorobenzene. Sample matrix interference and/or non -homogeneity are suspected because the associated laboratory control sample / laboratory control sample duplicate (LCS/LCSD) precision was within acceptance limits. Method NWTPH-Gx: The following sample was collected in a properly preserved vial; however, the pH was outside the required criteria when verified by the laboratory. The sample was analyzed outside the 7-day holding time specified for unpreserved samples but within the 14-day holding time specified for preserved samples: B02-15GW (280-176200-6). No additional analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page. GC/MS Semi VOA Method 8270D SIM: The matrix spike / matrix spike duplicate (MS/MSD) recoveries for preparation batch 280-611929 and analytical batch 280-612138 were outside control limits for one or more analytes. See QC Sample Results for detail. Sample matrix interference and/or non -homogeneity are suspected because the associated laboratory control sample (LCS) recovery is within acceptance limits. Method 8270D SIM: The matrix spike (MS) recoveries for preparation batch 280-612087 and analytical batch 280-612216 were outside Eurofins Denver Page 6 of 160 6/1/2023 Case Narrative Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon Job ID: 280-176200-1 (Continued) Laboratory: Eurofins Denver (Continued) acontrol limits forAcenaphthylene and Indeno[1,2,3-cd]pyrene. Sample matrix interference is suspected because the associated laboratory control sample (LCS) recovery was within acceptance limits. Method 8270D SIM: The matrix spike / matrix spike duplicate (MS/MSD) precision for preparation batch 280-612087 and analytical batch 280-612216 was outside control limits for Fluoranthene and Pyrene . Sample matrix interference is suspected. Method 8270D SIM: The method blank for preparation batch 280-612087 contained several analytes above one-half the reporting limit (RL). None of the samples associated with this method blank contained the target compound at a level greater than the RL; therefore, re -extraction and/or re -analysis of samples were not performed. Method 8270D SIM: The matrix spike / matrix spike duplicate (MS/MSD) recoveries for preparation batch 280-612097 and analytical batch 280-612600 were outside control limits for several analytes. See QC Sample Results for detail. Sample matrix interference and/or non -homogeneity are suspected because the associated laboratory control sample (LCS) recovery is within acceptance limits. Method 8270D SIM: The matrix spike / matrix spike duplicate (MS/MSD) precision for preparation batch 280-612097 and analytical batch 280-612600 was outside control limits. Sample matrix interference and/or non -homogeneity are suspected. Method 8270D SIM: Surrogate Terphenyl-d14 recovery for the following sample was outside control limits with a recovery of 45% and a lower control limit of 46%: DU07-230502-Fill (280-176200-11). Evidence of matrix interference is present; therefore, re -extraction and/or re -analysis was not performed. Method 8270D: The laboratory control sample (LCS) for preparation batch 280-611987 and 280-612492 and analytical batch 280-612910 recovered outside control limits for the following analytes: Bis(2-ethylhexyl) phthalate @ 120% UCL is 115%, 2,4-Dinitrophenol @ 117% UCL is 111 %, Bis(2-chloroethyl)ether @ 140% UCL is 110%, Di-n-butyl phthalate @ 120% UCL is 111 %, Butyl benzyl phthalate @ 121 % UCL is 116%, 4-Chloro-3-methylphenol @ 114% UCL is 113%, Hexachlorocyclopentadiene @ 108% UCL is 102%, Benzo[a]anthracene @ 118% UCL is 114%, N-Nitrosodiphenylamine @ 105% UCL is 102%, Bis(2-chloroethoxy)methane @ 107% UCL is 106% and Dibenz(a,h)anthracene @ 111 % UCL is 108%. These analytes were biased high in the LCS and were not detected in the associated samples; therefore, the data have been reported. DU01-230504-0.5 (280-176200-15), DU01-230504-0.5-Rep1 (280-176200-16), DU01-230504-0.5-Rep2 (280-176200-17) and (LCS 280-612492/2-A) Method 8270D: The following analytes recovered outside control limits for the LCS associated with preparation batch 280-611987 and 280-612492 and analytical batch 280-612910: Benzo[b]fluoranthene @ 117% UCL is 114% MEUCL is 122% and Benzo[k]fluoranthene @ 120% UCL is 119% MEUCL is 128%. This is not indicative of a systematic control problem because these were random marginal exceedances. Qualified results have been reported. DU01-230504-0.5 (280-176200-15), DU01-230504-0.5-Rep1 (280-176200-16), DU01-230504-0.5-Rep2 (280-176200-17) and (LCS 280-612492/2-A) Method 8270D: The laboratory control sample (LCS) for preparation batch 280-611987 and 280-612492 and analytical batch 280-612910 recovered outside control limits for the following analytes: 3,3'-Dimethylbenzidine @ 8% LCL is 10%, Benzoic acid @ 24% LCL is 43%, Aniline @ 10% LCL is 24% and Pyridine @ 24% LCL is 32%, These have been identified as a poor performing analyte when analyzed using this method; therefore, re-extraction/re-analysis was not performed. These results have been reported and qualified. DU01-230504-0.5 (280-176200-15), DU01-230504-0.5-Rep1 (280-176200-16), DU01-230504-0.5-Rep2 (280-176200-17) and (LCS 280-612492/2-A) Method 8270D: Internal standard (ISTD) response for the following sample was outside of acceptance limits for Perylene-d12, failing low: (MB 280-612492/1-A). The MB was ND for the target compounds associated to the failing ISTD. preparation batch 280-612492 and analytical batch 280-612910 No additional analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page. GC VOA No analytical or quality issues were noted, other than those described in the Definitions/Glossary page. GC Semi VOA Method 8082A: The following samples in preparation batch 280-611987 and 280-612472 and analytical batch 280-612755 required a sulfuric acid clean-up, via EPA Method 3665A, to reduce matrix interferences: DU05-SU06-230505-COMP01 (280-176200-3), Eurofins Denver Page 7 of 160 6/1/2023 Case Narrative Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Job ID: 280-176200-1 (Continued) Job ID: 280-176200-1 Laboratory: Eurofins Denver (Continued) DU05-SU06-230505-COMP02 (280-176200-4), DU07-230502-Native (280-176200-10), DU07-230502-Fill (280-176200-11), DU04-SU02-230504-0.5 (280-176200-12), DU04-SU01-230504-0.5 (280-176200-13), DU06-SU03-230504-0.5 (280-176200-14), DU06-SU04-230505-0.5 (280-176200-20), (LCS 280-612472/2-A), (MB 280-612472/1-A), (280-176200-A-14-L MS) and (280-176200-A-14-M MSD). Method 8082A: The Tetrachloro-m-xylene surrogate recovery for the following samples in preparation batch 280-611987 and 280-612472 and analytical batch 280-612755 was outside acceptance limits (high biased) on the primary column due to matrix interference: DU07-230502-Native (280-176200-10), DU07-230502-Fill (280-176200-11) and DU04-SU02-230504-0.5 (280-176200-12). The recovery is within acceptance limits on the other column, indicating that the extraction process was in control. The sample was non -detects on both columns. Method 8082A: The Tetrachloro-m-xylene surrogate recovery for the following samples in preparation batch 280-611987 and 280-612472 and analytical batch 280-612755 was outside acceptance limits (high biased) on the primary column due to matrix interference: DU04-SU01-230504-0.5 (280-176200-13). The recovery is within acceptance limits on the other column, indicating that the extraction process was in control. The sample results were within 40% RPD between the two columns. Method 8082A: The following sample in preparation batch 280-611987 and 280-612472 and analytical batch 280-612755 appears to contain polychlorinated biphenyls (PCBs); however, due to weathering or other environmental processes, the PCBs in the sample do not closely match any of the laboratory's Aroclor standards used for instrument calibration: DU04-SU01-230504-0.5 (280-176200-13). The sample(s) has been quantified and reported as Aroclor 1254. Due to the poor match with the Aroclor standard(s), there is increased qualitative and quantitative uncertainty associated with this result. Method 8082A: The DCB Decachlorobiphenyl surrogate recovery for the following samples in preparation batch 280-611987 and 280-612472 and analytical batch 280-612755 was outside acceptance limits (low biased) on the primary column due to matrix interference: DU06-SU03-230504-0.5 (280-176200-14), (280-176200-A-14-L MS) and (280-176200-A-14-M MSD). The recovery is within acceptance limits on the other column, indicating that the extraction process was in control. The parent sample was non -detects on both columns. Method 8082A: The Tetrachloro-m-xylene surrogate recovery for the following samples in preparation batch 280-612472 and analytical batch 280-612755 was outside acceptance limits (high biased) on the primary column: (MB 280-612472/1-A). The recovery is within acceptance limits on the other column, indicating that the extraction process was in control. The sample was non -detects on both columns. Method NWTPH-Dx: The sample duplicate (DUP) precision for preparation batch 580-425843 and analytical batch 580-425959 was outside control limits for Motor Oil (>C24-C36). Sample non -homogeneity is suspected. Method NWTPH-Dx: The following samples were prepared outside of preparation holding time due to the laboratory technicians not having a full shift between the date of login review and the hold expiration date: DU07-230502-Native (280-176200-10), DU07-230502-Fill (280-176200-11) and (280-176200-D-10-13 DU). There was an issue in which the initial ISM aliquots sent to Eurofins Seattle were not received within thermal preservation range. In an attempt to re -send new aliquots within thermal preservation range, the two samples tagged were unable to be run within holding time. The client was contacted regarding this issue and authorized the lab to proceed with analysis. No additional analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page. Metals No analytical or quality issues were noted, other than those described in the Definitions/Glossary page. General Chemistry No analytical or quality issues were noted, other than those described in the Definitions/Glossary page. Geotechnical Methods Increment, prep: In analytical batch 280-611993, the following samples were air dried and sieved per the procedure; however, the samples contained material that would not pass through the sieve: DU01-230504-0.5 (280-176200-15), DU01-230504-0.5-Rep1 (280-176200-16), DU01-230504-0.5-Rep2 (280-176200-17), DU02-230504-0.5 (280-176200-18), DU03-230505-0.5 (280-176200-21), Eurofins Page 8 of 160 6/11/2023 Case Narrative Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Job ID: 280-176200-1 (Continued) Job ID: 280-176200-1 Laboratory: Eurofins Denver (Continued) a DU03-230505-0.5-Rep1 (280-176200-22), DU03-230505-0.5-Rep2 (280-176200-23), (280-176200-A-21 MS) and (280-176200-A-21 MSD). This material was removed, was not extracted, and is described in the aliquot spreadsheet. For methods ISM_A_DD_SI_SS/8290. Methods Increment, prep: In analytical batch 280-611989, the following samples were air dried and sieved per the procedure; however, the samples contained material that would not pass through the sieve: DU07-230502-Native (280-176200-10), DU07-230502-Fill (280-176200-11), DU04-SU01-230504-0.5 (280-176200-13), DU06-SU03-230504-0.5 (280-176200-14), DU01-230504-0.5 (280-176200-15), DU01-230504-0.5-Rep1 (280-176200-16), DU01-230504-0.5-Rep2 (280-176200-17), DU02-230504-0.5 (280-176200-18), DU06-SU04-230505-0.5 (280-176200-20), DU03-230505-0.5 (280-176200-21), DU03-230505-0.5-Rep1 (280-176200-22), DU03-230505-0.5-Rep2 (280-176200-23), (280-176200-A-20 MS) and (280-176200-A-20 MSD). This material was removed, was not extracted, and is described in the aliquot spreadsheet. For methods ISM_A_DD_SI_SS/NWTPH. Methods Increment, prep: In preparation batch 280-611987, the following samples were air dried and sieved per the procedure; however, the samples contained material that would not pass through the sieve: DU07-230502-Native (280-176200-10), DU07-230502-Fill (280-176200-11), DU04-SU02-230504-0.5 (280-176200-12), DU04-SU01-230504-0.5 (280-176200-13), DU06-SU03-230504-0.5 (280-176200-14), DU01-230504-0.5 (280-176200-15), DU01-230504-0.5-Rep1 (280-176200-16), DU01-230504-0.5-Rep2 (280-176200-17), DU02-230504-0.5 (280-176200-18), DU06-SU04-230505-0.5 (280-176200-20), DU03-230505-0.5 (280-176200-21), DU03-230505-0.5-Rep1 (280-176200-22), DU03-230505-0.5-Rep2 (280-176200-23), (280-176200-A-10 MS), (280-176200-A-10 MSD), (280-176200-A-13 MS), (280-176200-A-13 MSD), (280-176200-A-14 MS), (280-176200-A-14 MSD), (280-176200-A-15 MS) and (280-176200-A-15 MSD). This material was removed, was not extracted, and is described in the aliquot spreadsheet. For methods ISM_DD_SI_SS/6010D/7471 B/8720_SIM/8082A/8270D. No additional analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page. Organic Prep Method 351OC: The following samples B03-19GW (280-176200-5) and B02-15GW (280-176200-6) were yellow, preparation batch 280-611929 method 8270 SIM LVI. Method 3510C: The following samples B03-19GW (280-176200-5) and B02-15GW (280-176200-6) exhibited mild turbidity, preparation batch 280-611929 method 8270 SIM LVI. Method 3546: Due to the matrix consisting of a wet gritty soil, the initial volumes used for the following samples DU05-SU06-230505-COMP01 (280-176200-3) and DU05-SU06-230505-COMP02 (280-176200-4) in preparation batch 280-612097 deviated from the standard procedure: To protect the microwave and to prevent the samples from venting the samples were ran at five grams instead of the full fifteen grams. The reporting limits (RLs) have been adjusted proportionately. Method 8270D_SIM. Method 351 OC: The following samples: DU05-SU05-230505-Pond01 (280-176200-1) and DU05-SU05-230505-Pond02 (280-176200-2) were yellow in color, preparation batch 280-612087 method: 8270/SIM. Method 3546: Due to the matrix consisting of wet non -homogenous sandy clay with rocks, five grams was used for the initial volume(s) instead of fifteen grams, which deviated from the standard procedure in order to prevent equipment damage: DU05-SU06-230505-COMP01 (280-176200-3) and DU05-SU06-230505-COMP02 (280-176200-4) in preparation batch 280-612472 . The reporting limits (RLs) have been adjusted proportionately. Method 8082A. Method 3546: Due to the matrix consisting of wet -non homogenous rocky, and sandy clay, five grams was used for the initial volume(s) instead of fifteen grams, which deviated from the standard procedure in order to prevent equipment damage: B03-17 (280-176200-7) and B02-8 (280-176200-8) in preparation batch 280-612481 . The reporting limits (RLs) have been adjusted proportionately. Method 8270D_SIM. Method 351 OC: The following sample formed emulsions during the extraction procedure: DU05-SU05-230505-Pond02 (280-176200-2). The emulsions were broken up using additional methylene chloride rinses and sodium sulfate filtration. No additional analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page. VOA Prep Method 5035: The following samples were provided to the laboratory with a significantly different initial weight than that required by the Eurofin Page 9 of 160 6/11/23 Case Narrative Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Job ID: 280-176200-1 (Continued) Job ID: 280-176200-1 Laboratory: Eurofins Denver (Continued) a reference method: DU05-SU06-230505-COMP01 (280-176200-3) and DU05-SU06-230505-COMP02 (280-176200-4). Deviations in the weight by more than 20% may affect reporting limits and potentially method performance. The method specifies 10g. The amount provided was below this range. No additional analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page. Eurofins Denver Page 10 of 160 6/1/2023 Detection Summary Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Client Sample ID: DUOS-SU05-230505-Pond01 Job ID: 280-176200-1 Lab Sample ID: 280-176200-1 Analyte Result Qualifier RL MDL Unit Dill Fac D Method Prep Type Acetone 11 J 15 6.6 ug/L 1 8260D TotaVNA Toluene 1.4 1.0 0.32 ug/L 1 8260D TotaVNA Acenaphthene 0.0089 J B 0.10 0.0042 ug/L 1 8270D SIM Total/NA Acenaphthylene 0.0061 J B 0.10 0.0051 ug/L 1 8270D SIM TotaVNA Benzo[a]anthracene 0.033 J B 0.10 0.029 ug/L 1 8270D SIM Total/NA Benzo[k]fluoranthene 0.025 J B 0.10 0.023 ug/L 1 8270D SIM Total/NA #2 Diesel (C10-C24) 0.59 0.12 0.068 mg/L 1 NWTPH-Dx Total/NA Motor Oil (>C24-C36) 1.1 0.37 0.10 mg/L 1 NWTPH-Dx TotaVNA Barium 57 10 0.82 ug/L 1 6010D Dissolved Cadmium 0.29 J 5.0 0.13 ug/L 1 6010D Dissolved Chromium 1.8 J 10 0.66 ug/L 1 6010D Dissolved Client Sample ID: DU05-SU05-230505-Pond02 Lab Sample ID: 280-176200-2 Anayte Result Qualifier RL MDL Unit Dill Fac D Method Prep Type Acetone 6.7 J 15 6.6 ug/L 1 8260D Total/NA #2 Diesel (C10-C24) 0.60 0.11 0.067 mg/L 1 NWTPH-Dx Total/NA Motor Oil(>C24-C36) 1.1 0.36 0.099 mg/L 1 NWTPH-Dx TotaVNA Barium 40 10 0.82 ug/L 1 6010D Dissolved Cadmium 0.19 J 5.0 0.13 ug/L 1 601OD Dissolved Chromium 1.1 J 10 0.66 ug/L 1 601OD Dissolved Client Sample ID: DU05-SU06-230505-COMP01 Lab Sample ID: 280-176200-3 Ana" Result Qualifier RL MDL Unit Dill Fac D Method Prep Type 2-Methylnaphthalene 3.7 J 35 2.2 ug/Kg 1 * 8270D SIM Total/NA Benzo[g,h,i]perylene 34 J 35 7.7 ug/Kg 1 * 8270D SIM Total/NA Chrysene 9.8 J 35 7.0 ug/Kg 1 * 8270D SIM Total/NA Fluoranthene 24 J 35 7.0 ug/Kg 1 * 8270D SIM Total/NA Fluorene 9.1 J 35 3.3 ug/Kg 1 * 8270D SIM Total/NA Indeno[1,2,3-cd]pyrene 28 J 35 7.7 ug/Kg 1 * 8270D SIM Total/NA Naphthalene 8.6 J 35 2.3 ug/Kg 1 * 8270D SIM Total/NA Phenanthrene 22 J 35 7.7 ug/Kg 1 * 8270D SIM Total/NA Pyrene 10 J 35 7.7 ug/Kg 1 * 8270D SIM Total/NA 1-Methylnaphthalene 1.9 J 35 1.8 ug/Kg 1 * 8270D SIM Total/NA #2 Diesel (C10-C24) 22 J 61 15 mg/Kg 1 * NWrPH-Dx Total/NA Motor Oil (>C24-C36) 310 61 21 mg/Kg 1 * NWrPH-Dx Total/NA Arsenic 1.1 J 1.8 0.59 mg/Kg 1 * 6010D Total/NA Barium 44 0.89 0.26 mg/Kg 1 * 601OD Total/NA Chromium 7.6 1.3 0.11 mg/Kg 1 * 6010D Total/NA Lead 4.3 0.80 0.28 mg/Kg 1 * 6010D Total/NA Mercury 0.013 J 0.021 0.0069 mg/Kg 1 rxx 7471B Total/NA Client Sample ID: DU05-SU06-230505-COMP02 Lab Sample ID: 280-1762004 Ann" Result Qualifier RL MDL Unit Dill Fac D Method Prep Type 2-Methylnaphthalene 4.4 J 35 2.1 ug/Kg 1 -o 8270D SIM Total/NA Benzo[k]fluoranthene 12 J 35 8.3 ug/Kg 1 o 8270D SIM Total/NA Benzo[g,h,i]peryiene 40 35 7.6 ug/Kg 1 * 8270D SIM Total/NA Fluoranthene 24 J 35 6.9 ug/Kg 1 * 8270D SIM Total/NA Fluorene 3.9 J 35 3.2 ug/Kg 1 * 8270D SIM Total/NA Indeno[1,2,3-cd]pyrene 29 J 35 7.6 ug/Kg 1 * 8270D SIM Total/NA This Detection Summary does not include radiochemical test results. Eurofins Denver I� 5 Page 11 of 160 6/1/2023 Detection Summary Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon Client Sample ID: DU05-SU06-230505-COMP02 (Continued) Lab Sample ID: 280-176200-4 Analyte Result Qualifier RL MDL Unit Dil Fac D Method Prep Type Naphthalene 9.9 J 35 2.3 ug/Kg 1 D 8270D SIM Total/NA Phenanthrene 23 J 35 7.6 ug/Kg 1 i:� 8270D SIM Total/NA Pyrene 9.6 J 35 7.6 ug/Kg 1 31 8270D SIM Total/NA 1-Methylnaphthalene 2.4 J 35 1.8 ug/Kg 1 c� 8270D SIM Total/NA #2 Diesel (C10-C24) 18 J 56 14 mg/Kg 1 NWTPH-Dx Total/NA Motor Oil (>C24-C36) 240 56 19 mg/Kg 1 �a NWTPH-Dx Total/NA Arsenic 1.5 J 1.7 0.58 mg/Kg 1 a 601OD Total/NA Barium 57 0.87 0.26 mg/Kg 1 t� 601OD Total/NA Chromium 11 1.3 0.11 mg/Kg 1 o 601OD Total/NA Lead 5.9 0.78 0.27 mg/Kg 1 u 6010D Total/NA Mercury 0.014 J 0.023 0.0074 mg/Kg 1 ia 7471 B Total/NA Client Sample ID: B03-19GW Lab Sample ID: 280-176200-5 Analyte Result Qualifier RL MDL Unit Dil Fac D Method Prep Type Toluene 0.33 J 1.0 0.32 ug/L 1 8260D Total/NA 2-Methylnaphthalene 0.030 J 0.10 0.022 ug/L 1 8270D SIM Total/NA Acenaphthene 0.032 J 0.10 0.0043 ug/L 1 8270D SIM Total/NA Acenaphthylene 0.017 J 0.10 0.0053 ug/L 1 8270D SIM Total/NA Benzo[a]anthracene 0.098 J 0.10 0.029 ug/L 1 8270D SIM Total/NA Benzo[a]pyrene 0.090 J 0.10 0.026 ug/L 1 8270D SIM Total/NA Benzo[b]fluoranthene 0.10 0.10 0.041 ug/L 1 8270D SIM Total/NA Benzo[g,h,i]perylene 0.10 0.10 0.038 ug/L 1 8270D SIM Total/NA Benzo[k]fluoranthene 0.096 J 0.10 0.024 ug/L 1 8270D SIM Total/NA Chrysene 0.10 0.10 0.034 ug/L 1 8270D SIM Total/NA Dibenz(a,h)anthracene 0.094 J 0.10 0.029 ug/L 1 8270D SIM Total/NA Fluoranthene 0.096 J 0.10 0.050 ug/L 1 8270D SIM Total/NA Fluorene 0.034 J 0.10 0.020 ug/L 1 8270D SIM Total/NA Indeno[1,2,3-cd]pyrene 0.097 J 0.10 0.041 ug/L 1 8270D SIM Total/NA Phenanthrene 0.063 J 0.10 0.051 ug/L 1 8270D SIM Total/NA Pyrene 0.096 J 0.10 0.047 ug/L 1 8270D SIM Total/NA Anthracene 0.055 J 0.10 0.032 ug/L 1 8270D SIM Total/NA 1 -Methyl naphthalene 0.027 J 0.10 0.019 ug/L 1 8270D SIM Total/NA #2 Diesel (C10-C24) 0.25 0.11 0.066 mg/L 1 NWTPH-Dx Total/NA Motor Oil (>C24-C36) 0.72 0.36 0.098 mg/L 1 NWTPH-Dx Total/NA Client Sample ID: B02-15GW Lab Sample ID: 280-176200-6 Analyte Result Qualifier RL MDL Unit Dil Fac D Method Prep Type Acetone 40 15 6.6 ug/L 1 8260D Total/NA 2-Methylnaphthalene 0.065 J 0.094 0.020 ug/L 1 8270D SIM Total/NA Acenaphthene 0.081 J 0.094 0.0039 ug/L 1 8270D SIM Total/NA Fluorene 0.094 0.094 0.018 ug/L 1 8270D SIM Total/NA Naphthalene 0.049 J 0.094 0.022 ug/L 1 8270D SIM Total/NA Phenanthrene 0.049 J 0.094 0.046 ug/L 1 8270D SIM Total/NA 1 -Methyl naphthalene 0.058 J 0.094 0.017 ug/L 1 8270D SIM Total/NA #2 Diesel (C10-C24) 2.3 0.11 0.065 mg/L 1 NWTPH-Dx Total/NA Motor Oil (>C24-C36) 4.2 0.35 0.096 mg/L 1 NWTPH-Dx Total/NA This Detection Summary does not include radiochemical test results. Eurofins Denver Page 12 of 160 6/1/2023 Detection Summary Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Client Sample ID: B03-17 Analyte Result Qualifier Naphthalene 11 J Motor Oil (>C24-C36) 28 J Lead 6.9 RL MDL Unit 34 2.2 ug/Kg 58 20 mg/Kg 0.71 0.24 mg/Kg Job ID: 280-176200-1 Lab Sample ID: 280-176200-7 Dil Fac D Method Prep Type 1 t� 8270D SIM Total/NA 1 NWfPH-Dx Total/NA 1 6010D Total/NA Client Sample ID: B02-8 Lab Sample ID: 280-176200-8 Analyte Result Qualifier RL MDL Unit Dil Fac D Method Prep Type 2-Methylnaphthalene 4.4 J 33 2.1 ug/Kg 1 � 8270D SIM Total/NA Benzo[a]pyrene 5.5 J 33 4.9 ug/Kg 1 � 8270D SIM Total/NA Benzo[b]fluoranthene 9.6 J 33 8.0 ug/Kg 1 v 8270D SIM Total/NA Chrysene 8.2 J 33 6.7 ug/Kg 1 c� 8270D SIM Total/NA Fluoranthene 7.3 J 33 6.7 ug/Kg 1 ia 8270D SIM Total/NA Naphthalene 5.4 J 33 2.2 ug/Kg 1 i:� 8270D SIM Total/NA Phenanthrene 11 J 33 7.3 ug/Kg 1 D 8270D SIM Total/NA 1-Methylnaphthalene 2.7 J 33 1.7 ug/Kg 1 ia 8270D SIM Total/NA #2 Diesel (C10-C24) 66 56 14 mg/Kg 1 c� NWTPH-Dx Total/NA Motor Oil (>C24-C36) 190 56 20 mg/Kg 1 o NWTPH-Dx Total/NA Lead 2.9 0.69 0.24 mg/Kg 1 D 6010D Total/NA Client Sample ID: TB-230507-01 Lab Sample ID: 280-176200-9 No Detections. Client Sample ID: DU07-230502-Native Lab Sample ID: 280-176200-10 Analyte Result Qualifier RL MDL Unit Dil Fac D Method Prep Type Naphthalene 1.1 J 10 0.65 ug/Kg 1 8270D SIM Total/NA Arsenic 2.3 1.5 0.49 mg/Kg 1 6010D Total/NA Barium 81 0.73 0.22 mg/Kg 1 6010D Total/NA Chromium 20 B 1.1 0.090 mg/Kg 1 6010D Total/NA Lead 3.4 0.66 0.23 mg/Kg 1 6010D Total/NA Mercury 0.019 0.017 0.0056 mg/Kg 1 7471 B Total/NA Incremented sample generated True NONE 1 Increment, prep Total/NA Client Sample ID: DU07-230502-Fill Lab Sample ID: 280-176200-11 Analyte Result Qualifier RL MDL Unit oil Fac D Method Prep Type 2-Methyl naphthalene 1.0 J 9.9 0.61 ug/Kg 1 8270D SIM Total/NA Benzo[a]anthracene 2.7 J 9.9 1.8 ug/Kg 1 8270D SIM Total/NA Benzo[a]pyrene 2.6 J 9.9 1.5 ug/Kg 1 8270D SIM Total/NA Benzo[b]fluoranthene 4.7 J 9.9 2.4 ug/Kg 1 8270D SIM Total/NA Benzo[g,h,i]perylene 2.5 J 9.9 2.2 ug/Kg 1 8270D SIM Total/NA Chrysene 4.0 J 9.9 2.0 ug/Kg 1 8270D SIM Total/NA Fluoranthene 4.5 J 9.9 2.0 ug/Kg 1 8270D SIM Total/NA Naphthalene 1.8 J 9.9 0.65 ug/Kg 1 8270D SIM Total/NA Phenanthrene 3.4 J 9.9 2.2 ug/Kg 1 8270D SIM Total/NA Pyrene 3.9 J 9.9 2.2 ug/Kg 1 8270D SIM Total/NA 1-Methyl naphthalene 0.62 J 9.9 0.52 ug/Kg 1 8270D SIM Total/NA Motor Oil (>C24-C36) 41 J H 48 17 mg/Kg 1 NWTPH-Dx Total/NA Arsenic 4.9 1.5 0.50 mg/Kg 1 6010D Total/NA Barium 200 0.75 0.22 mg/Kg 1 6010D Total/NA Cadmium 0.045 J 0.37 0.031 mg/Kg 1 6010D Total/NA Chromium 31 B 1.1 0.092 mg/Kg 1 6010D Total/NA This Detection Summary does not include radiochemical test results. Eurofins Denver Page 13 of 160 6/1 /2023 Detection Summary Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Client Sample ID: DU07-230502-Fill (Continued) Analyte Result Qualifier Lead 9.4 Mercury 0.057 Incremented sample generated True Client Sample ID: DU04-SU02-230504-0.5 CAnalyte Result Qualifier Mercury 0.050 Client Sample ID: DU04-SU01-230504-0.5 Analyte Result Qualifier 2-Methylnaphthalene 16 Acenaphthene 6.6 J Benzo[a]anthracene 1.8 J Chrysene 3.7 J Fluoranthene 14 Fluorene 4.5 J Naphthalene 10 Phenanthrene 26 Pyrene 8.9 J 1-Methyl naphtha lene 7.9 J PCB-1254 40 J Polychlorinated biphenyls, Total 40 J #2 Diesel (C10-C24) 56 Motor Oil (>C24-C36) 350 Lead 9.5 LIncremented sample generated True ...... _ _ --- ----- - - Client Sample ID: DU06-SU03-230504-0.5 FAnalyte 2-Methyl naphthalene Acenaphthene Acenaphthylene Benzo[a]anthracene Benzo[a]pyrene Benzo[b]fluoranthene Benzo[g,h,i]perylene Benzo[k]fluoranthene Chrysene Fluoranthene Indeno[1,2,3-cd]pyrene Naphthalene Phenanthrene I Pyrene Anthracene 1-Methylnaphthalene #2 Diesel (C10-C24) Motor Oil (>C24-C36) Arsenic Barium Job ID: 280-176200-1 Lab Sample ID: 280-176200-11 RL MDL Unit Dil Fac D Method Prep Type 0.67 0.23 mg/Kg 1 6010D Total/NA 0.017 0.0055 mg/Kg 1 7471 B Total/NA NONE 1 Increment, prep Total/NA ........ __.___ Lab Sample ID: 280-176200-12 RL MDL Unit 0.017 0.0056 mg/Kg Dil Fac D Method Prep Type 1 7471 B Total/NA Lab Sample ID: 280-176200-13 RL MDL Unit Dil Fac D Method Prep Type 9.9 0.61 ug/Kg 1 8270D SIM Total/NA 9.9 0.91 ug/Kg 1 8270D SIM Total/NA 9.9 1.8 ug/Kg 1 8270D SIM Total/NA 9.9 2.0 ug/Kg 1 8270D SIM Total/NA 9.9 2.0 ug/Kg 1 8270D SIM Total/NA 9.9 0.93 ug/Kg 1 8270D SIM Total/NA 9.9 0.64 ug/Kg 1 8270D SIM Total/NA 9.9 2.2 ug/Kg 1 8270D SIM Total/NA 9.9 2.2 ug/Kg 1 8270D SIM Total/NA 9.9 0.51 ug/Kg 1 8270D SIM Total/NA 65 11 ug/Kg 1 8082A Total/NA 65 2.3 ug/Kg 1 8082A Total/NA 49 12 mg/Kg 1 NWTPH-Dx Total/NA 49 17 mg/Kg 1 NWTPH-Dx Total/NA 0.67 0.23 mg/Kg 1 6010D Total/NA NONE 1 Increment, prep Total/NA Lab Sample ID: 280-176200-14 Result Qualifier RL MDL Unit Dil Fac D Method Prep Type 14 10 0.62 ug/Kg 1 8270D SIM Total/NA 2.8 J 10 0.92 ug/Kg 1 8270D SIM Total/NA 3.3 J 10 0.78 ug/Kg 1 8270D SIM Total/NA 8.5 J 10 1.8 ug/Kg 1 8270D SIM Total/NA 8.4 J 10 1.5 ug/Kg 1 8270D SIM Total/NA 15 10 2.4 ug/Kg 1 8270D SIM Total/NA 13 10 2.2 ug/Kg 1 8270D SIM Total/NA 3.5 J 10 2.0 ug/Kg 1 8270D SIM Total/NA 17 10 2.0 ug/Kg 1 8270D SIM Total/NA 17 10 2.0 ug/Kg 1 8270D SIM Total/NA 8.9 J 10 2.2 ug/Kg 1 8270D SIM Total/NA 8.0 J 10 0.65 ug/Kg 1 8270D SIM Total/NA 20 10 2.2 ug/Kg 1 8270D SIM Total/NA 24 10 2.2 ug/Kg 1 8270D SIM Total/NA 8.0 J 10 1.4 ug/Kg 1 8270D SIM Total/NA 6.6 J 10 0.52 ug/Kg 1 8270D SIM Total/NA 280 47 12 mg/Kg 1 NWTPH-Dx Total/NA 2200 47 16 mg/Kg 1 NWTPH-Dx Total/NA 2.2 1.4 0.48 mg/Kg 1 6010D Total/NA 57 0.72 0.21 mg/Kg 1 6010D Total/NA This Detection Summary does not include radiochemical test results. Eurofins Denver Page 14 of 160 6/1/2023 Detection Summary Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon Client Sample ID: DU06-SU03-230504-0.5 (Continued) Lab Sample ID: 280-176200-14 Analyte Result Qualifier RL MDL Unit Dil Fac D Method Prep Type Cadmium 0.13 J 0.36 0.030 mg/Kg 1 6010D Total/NA Chromium 14 B 1.1 0.089 mg/Kg 1 6010D Total/NA Lead 20 0.65 0.22 mg/Kg 1 6010D Total/NA Mercury 0.049 0.018 0.0058 mg/Kg 1 7471 B Total/NA Incremented sample generated True NONE 1 Increment, prep Total/NA Client Sample ID: DU01-230504-0 5 Lab Sample ID: 280-176200-15 Analyte Result Qualifier RL MDL Unit Dil Fac D Method Prep Type Benzo[a]anthracene 36 J F1 *+ 330 20 ug/Kg 1 8270D Total/NA Benzo[b]fluoranthene 200 J *+ 330 26 ug/Kg 1 8270D Total/NA Benzo[a]pyrene 90 J 330 20 ug/Kg 1 8270D Total/NA Chrysene 36 J 330 27 ug/Kg 1 8270D Total/NA Pyrene 29 J 330 12 ug/Kg 1 8270D Total/NA #2 Diesel (C10-C24) 15 J 49 12 mg/Kg 1 NWTPH-Dx Total/NA Motor Oil (>C24-C36) 180 49 17 mg/Kg 1 NWTPH-Dx Total/NA Arsenic 2.3 1.6 0.53 mg/Kg 1 601OD Total/NA Barium 51 0.80 0.24 mg/Kg 1 601OD Total/NA Cadmium 0.038 J 0.40 0.033 mg/Kg 1 601OD Total/NA Chromium 12 B 1.2 0.099 mg/Kg 1 601OD Total/NA Lead 5.2 0.72 0.25 mg/Kg 1 601OD Total/NA Mercury 0.036 0.017 0.0055 mg/Kg 1 7471 B Total/NA Incremented sample generated True NONE 1 Increment, prep Total/NA Client Sample ID: DU01-230504-0.5-Rep1 Lab Sample ID: 280-176200-16 Analyte Result Qualifier RL MDL Unit Dil Fac D Method Prep Type Benzo[a]anthracene 22 J *+ 320 19 ug/Kg 1 8270D Total/NA Benzo[b]fluoranthene 170 J *+ 320 25 ug/Kg 1 8270D Total/NA Benzo[a]pyrene 76 J 320 19 ug/Kg 1 8270D Total/NA Pyrene 20 J 320 12 ug/Kg 1 8270D Total/NA #2 Diesel (C10-C24) 16 J 49 12 mg/Kg 1 NWTPH-Dx Total/NA Motor Oil (>C24-C36) 200 49 17 mg/Kg 1 NWTPH-Dx Total/NA Arsenic 2.3 1.4 0.47 mg/Kg 1 6010D Total/NA Barium 56 0.71 0.21 mg/Kg 1 6010D Total/NA Cadmium 0.035 J 0.35 0.029 mg/Kg 1 6010D Total/NA Chromium 13 B 1.1 0.087 mg/Kg 1 6010D Total/NA Lead 4.8 0.64 0.22 mg/Kg 1 6010D Total/NA Mercury 0.061 0.017 0.0056 mg/Kg 1 7471 B Total/NA Incremented sample generated True NONE 1 Increment, prep Total/NA Client Sample ID: DU01-230504-0.5-Rep2 Lab Sample ID: 280-176200-17 Analyte Result Qualifier RL MDL Unit Dil Fac D Method Prep Type Benzo[a]anthracene 32 J *+ 330 20 ug/Kg 1 8270D Total/NA Benzo[b]fluoranthene 200 J *+ 330 26 ug/Kg 1 8270D Total/NA Benzo[a]pyrene 87 J 330 20 ug/Kg 1 8270D Total/NA Chrysene 32 J 330 27 ug/Kg 1 8270D Total/NA Pyrene 25 J 330 12 ug/Kg 1 8270D Total/NA #2 Diesel (C10-C24) 15 J 49 12 mg/Kg 1 NWTPH-Dx Total/NA Motor Oil (>C24-C36) 190 49 17 mg/Kg 1 NWTPH-Dx Total/NA Arsenic 2.2 1.5 0.49 mg/Kg 1 6010D Total/NA This Detection Summary does not include radiochemical test results. Eurofins Denver Page 15 of 160 6/1/2023 Detection Summary Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon Client Sample ID: DU01-230504-0.5-Rep2 (Continued) Lab Sample ID: 280-176200-17 Analyte Result Qualifier RL MDL Unit Dil Fac D Method Prep Type Barium 53 0.73 0.22 mg/Kg 1 6010D Total/NA Chromium 11 B 1.1 0.090 mg/Kg 1 6010D Total/NA Lead 4.2 0.66 0.23 mg/Kg 1 601OD Total/NA Mercury 0.040 0.019 0.0060 mg/Kg 1 7471 B Total/NA Incremented sample generated True NONE 1 Increment, prep Total/NA Client Sample ID: DU02-230504-0.5 Lab Sample ID: 280-176200-18 Analyte Result Qualifier RL MDL Unit Dil Fac D Method Prep Type 2-Methylnaphthalene 1.9 J 10 0.62 ug/Kg 1 8270D SIM Total/NA Acenaphthylene 1.7 J 10 0.78 ug/Kg 1 8270D SIM Total/NA Benzo[a]pyrene 2.6 J 10 1.5 ug/Kg 1 8270D SIM Total/NA Benzo[b]fluoranthene 2.9 J 10 2.4 ug/Kg 1 8270D SIM Total/NA Benzo[g,h,i]perylene 2.7 J 10 2.2 ug/Kg 1 8270D SIM Total/NA Chrysene 3.2 J 10 2.0 ug/Kg 1 8270D SIM Total/NA Indeno[1,2,3-cd]pyrene 2.2 J 10 2.2 ug/Kg 1 8270D SIM Total/NA Naphthalene 7.5 J 10 0.65 ug/Kg 1 8270D SIM Total/NA 1 -Methyl naphthalene 1.3 J 10 0.52 ug/Kg 1 8270D SIM Total/NA Fluoranthene - DL 5.8 J 20 4.0 ug/Kg 2 8270D SIM Total/NA Phenanthrene - DL 7.7 J 20 4.4 ug/Kg 2 8270D SIM Total/NA Pyrene - DL 4.7 J 20 4.4 ug/Kg 2 8270D SIM Total/NA #2 Diesel (C10-C24) 12 J 49 12 mg/Kg 1 NWTPH-Dx Total/NA Motor Oil (>C24-C36) 110 49 17 mg/Kg 1 NWTPH-Dx Total/NA Arsenic 2.9 1.5 0.51 mg/Kg 1 6010D Total/NA Barium 110 0.76 0.23 mg/Kg 1 6010D Total/NA Cadmium 0.058 J 0.38 0.031 mg/Kg 1 6010D Total/NA Chromium 22 B 1.1 0.094 mg/Kg 1 6010D Total/NA Lead 11 0.69 0.24 mg/Kg 1 6010D Total/NA Mercury 0.039 0.019 0.0061 mg/Kg 1 7471 B Total/NA Incremented sample generated True NONE 1 Increment, prep Total/NA - - Client Sample Sample ID: TB-230507-02 - - - _ - - -- -_ - -- - _ - --- Lab Sample ID: 280-176200-19 L No Detections. Client Sample ID: DU06-SU04-230505-0.5 Lab Sample ID: 280-176200-20 Analyte Result Qualifier RL MDL Unit Dil Fac D Method Prep Type 2-Methylnaphthalene 8.2 J 9.7 0.60 ug/Kg 1 8270D SIM Total/NA Acenaphthene 6.3 J 9.7 0.90 ug/Kg 1 8270D SIM Total/NA Acenaphthylene 3.3 J 9.7 0.75 ug/Kg 1 8270D SIM Total/NA Benzo[a]anthracene 140 9.7 1.8 ug/Kg 1 8270D SIM Total/NA Benzo[a]pyrene 160 9.7 1.4 ug/Kg 1 8270D SIM Total/NA Benzo[b]fluoranthene 210 9.7 2.3 ug/Kg 1 8270D SIM Total/NA Benzo[g,h,i]perylene 92 9.7 2.1 ug/Kg 1 8270D SIM Total/NA Benzo[k]fluoranthene 76 9.7 1.9 ug/Kg 1 8270D SIM Total/NA Chrysene 170 9.7 1.9 ug/Kg 1 8270D SIM Total/NA Dibenz(a,h)anth racene 29 9.7 2.5 ug/Kg 1 8270D SIM Total/NA Fluoranthene 180 9.7 1.9 ug/Kg 1 8270D SIM Total/NA Fluorene 8.2 J 9.7 0.92 ug/Kg 1 8270D SIM Total/NA Indeno[1,2,3-cd]pyrene 97 9.7 2.1 ug/Kg 1 8270D SIM Total/NA Naphthalene 17 9.7 0.64 ug/Kg 1 8270D SIM Total/NA Phenanthrene 78 9.7 2.1 ug/Kg 1 8270D SIM Total/NA This Detection Summary does not include radiochemical test results. Eurofins Denver Page 16 of 160 6/1/2023 Detection Summary Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon Client Sample ID: DU06-SU04-230505-0.5 (Continued) Lab Sample ID: 280-176200-20 Analyte Result Qualifier RL MDL Unit Dil Fac D Method Prep Type Pyrene 180 9.7 2.1 ug/Kg 1 8270D SIM Total/NA Anthracene 21 9.7 1.4 ug/Kg 1 8270D SIM Total/NA 1-Methylnaphthalene 4.0 J 9.7 0.51 ug/Kg 1 8270D SIM Total/NA #2 Diesel (C10-C24) 62 46 11 mg/Kg 1 NWTPH-Dx Total/NA Motor Oil (>C24-C36) 360 46 16 mg/Kg 1 NWTPH-Dx Total/NA Arsenic 2.3 1.3 0.44 mg/Kg 1 6010D Total/NA Barium 49 0.67 0.20 mg/Kg 1 6010D Total/NA Cadmium 0.11 J 0.33 0.027 mg/Kg 1 6010D Total/NA Chromium 21 B 1.0 0.082 mg/Kg 1 6010D Total/NA Lead 20 0.60 0.21 mg/Kg 1 6010D Total/NA Mercury 0.043 0.020 0.0064 mg/Kg 1 7471 B Total/NA Incremented sample generated True NONE 1 Increment, prep Total/NA Client Sample ID: DU03-230505-0.5 Lab Sample ID: 280-176200-21 FAnalyte Result Qualifier RL MDL Unit Dil Fac D Method Prep Type 2-Methylnaphthalene 4.8 J 9.7 0.60 ug/Kg 1 8270D SIM Total/NA Benzo[a]anthrace ne 2.8 J 9.7 1.7 ug/Kg 1 8270D SIM Total/NA Benzo[b]fluoranthene 4.8 J 9.7 2.3 ug/Kg 1 8270D SIM Total/NA Benzo[g,h,i]perylene 2.2 J 9.7 2.1 ug/Kg 1 8270D SIM Total/NA Chrysene 5.6 J 9.7 1.9 ug/Kg 1 8270D SIM Total/NA Fluoranthene 6.5 J 9.7 1.9 ug/Kg 1 8270D SIM Total/NA Fluorene 2.9 J 9.7 0.91 ug/Kg 1 8270D SIM Total/NA Naphthalene 20 9.7 0.63 ug/Kg 1 8270D SIM Total/NA Phenanthrene 17 9.7 2.1 ug/Kg 1 8270D SIM Total/NA Pyrene 4.2 J 9.7 2.1 ug/Kg 1 8270D SIM Total/NA Anthracene 2.0 J 9.7 1.4 ug/Kg 1 8270D SIM Total/NA 1-Methylnaphthalene 3.1 J 9.7 0.50 ug/Kg 1 8270D SIM Total/NA #2 Diesel (C10-C24) 35 J 47 12 mg/Kg 1 NWTPH-Dx Total/NA Motor Oil (>C24-C36) 360 47 17 mg/Kg 1 NWTPH-Dx Total/NA Arsenic 2.2 1.4 0.46 mg/Kg 1 6010D Total/NA Barium 75 0.68 0.20 mg/Kg 1 6010D Total/NA Cadmium 0.047 J 0.34 0.028 mg/Kg 1 6010D Total/NA Chromium 15 B 1.0 0.084 mg/Kg 1 6010D Total/NA Lead 8.2 0.62 0.21 mg/Kg 1 6010D Total/NA Mercury 0.12 0.017 0.0056 mg/Kg 1 7471 B Total/NA Incremented sample generated True NONE 1 Increment, prep Total/NA Client Sample ID: DU03-230505-0.5-Rep1 Lab Sample ID: 280-176200-22 Analyte Result Qualifier RL MDL Unit Dil Fac D Method Prep Type 2-Methylnaphthalene 3.8 J 9.9 0.61 ug/Kg 1 8270D SIM Total/NA Benzo[a]anthracene 3.2 J 9.9 1.8 ug/Kg 1 8270D SIM Total/NA Benzo[b]fluoranthene 3.7 J 9.9 2.4 ug/Kg 1 8270D SIM Total/NA Benzo[g,h,i]perylene 2.3 J 9.9 2.2 ug/Kg 1 8270D SIM Total/NA Chrysene 5.6 J 9.9 2.0 ug/Kg 1 8270D SIM Total/NA Fluoranthene 7.7 J 9.9 2.0 ug/Kg 1 8270D SIM Total/NA Fluorene 2.4 J 9.9 0.93 ug/Kg 1 8270D SIM Total/NA Naphthalene 17 9.9 0.64 ug/Kg 1 8270D SIM Total/NA Phenanthrene 15 9.9 2.2 ug/Kg 1 8270D SIM Total/NA Pyrene 6.4 J 9.9 2.2 ug/Kg 1 8270D SIM Total/NA 1-Methylnaphthalene 2.3 J 9.9 0.51 ug/Kg 1 8270D SIM Total/NA This Detection Summary does not include radiochemical test results. Eurofins Denver Page 17 of 160 6/1/2023 Detection Summary Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon Client Sample ID: DU03-230505-0.5-Rep1 (Continued) Lab Sample ID: 280-176200-22 Analyte Result Qualifier RL MDL Unit Dil Fac D Method Prep Type #2 Diesel (C10-C24) 27 J 50 12 mg/Kg 1 NWTPH-Dx Total/NA Motor Oil (>C24-C36) 300 50 18 mg/Kg 1 NWTPH-Dx Total/NA Arsenic 2.3 1.5 0.50 mg/Kg 1 601OD Total/NA Barium 95 0.76 0.22 mg/Kg 1 601OD Total/NA Cadmium 0.046 J 0.38 0.031 mg/Kg 1 601OD Total/NA Chromium 18 B 1.1 0.093 mg/Kg 1 601OD Total/NA Lead 7.5 0.68 0.24 mg/Kg 1 6010D Total/NA Mercury 0.089 0.019 0.0063 mg/Kg 1 7471 B Total/NA Incremented sample generated True NONE 1 Increment, prep Total/NA Client Sample ID: DU03-230505-0.5-Rep2 Lab Sample ID: 280-176200-23 Analyte Result Qualifier RL MDL Unit Dil Fac D Method Prep Type 2-Methylnaphthalene 5.4 J 10 0.62 ug/Kg 1 8270D SIM Total/NA Benzo[b]fluoranthene 3.6 J 10 2.4 ug/Kg 1 8270D SIM Total/NA Chrysene 4.5 J 10 2.0 ug/Kg 1 8270D SIM Total/NA Fluoranthene 7.7 J 10 2.0 ug/Kg 1 8270D SIM Total/NA Fluorene 2.9 J 10 0.94 ug/Kg 1 8270D SIM Total/NA Naphthalene 22 10 0.65 ug/Kg 1 8270D SIM Total/NA Phenanthrene 17 10 2.2 ug/Kg 1 8270D SIM Total/NA Pyrene 6.0 J 10 2.2 ug/Kg 1 8270D SIM Total/NA 1-Methylnaphthalene 3.6 J 10 0.52 ug/Kg 1 8270D SIM Total/NA #2 Diesel (C10-C24) 35 J 49 12 mg/Kg 1 NWTPH-Dx Total/NA Motor Oil (>C24-C36) 360 49 17 mg/Kg 1 NWTPH-Dx Total/NA Arsenic 2.3 1.4 0.48 mg/Kg 1 6010D Total/NA Barium 98 0.72 0.21 mg/Kg 1 6010D Total/NA Cadmium 0.059 J 0.36 0.030 mg/Kg 1 6010D Total/NA Chromium 18 B 1.1 0.089 mg/Kg 1 601OD Total/NA Lead 8.7 0.65 0.22 mg/Kg 1 601OD Total/NA Mercury 0.097 0.018 0.0057 mg/Kg 1 7471 B Total/NA Incremented sample generated True NONE 1 Increment, prep Total/NA This Detection Summary does not include radiochemical test results. Eurofins Denver Page 18 of 160 6/1/2023 Method Summary Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Method Method Description Protocol Job ID: 280-176200-1 Laboratory 8260D Volatile Organic Compounds by GC/MS SW846 EET DEN NWTPH-Gx Northwest - Volatile Petroleum Products (GC/MS) NWTPH EET SEA 8270D Semivolatile Organic Compounds (GC/MS) SW846 EET DEN 8270D SIM Semivolatile Organic Compounds (GC/MS SIM) SW846 EET DEN 8082A Polychlorinated Biphenyls (PCBs) by Gas Chromatography SW846 EET DEN NWTPH-Dx Northwest - Semi -Volatile Petroleum Products (GC) NWTPH EET SEA 601 OD Metals (ICP) SW846 EET DEN 7470A Mercury (CVAA) SW846 EET DEN 7471 B Mercury (CVAA) SW846 EET DEN D 2216 Percent Moisture ASTM EET DEN Increment, prep ISM - Dry, Disaggregate, Sieve, 2 D Slabcake Subsample EPA EET DEN 3005A Preparation, Total Recoverable or Dissolved Metals SW846 EET DEN 3050B Preparation, Metals SW846 EET DEN 3050E MOD Preparation, Metals SW846 EET DEN 3510C Liquid -Liquid Extraction (Separatory Funnel) SW846 EET DEN 3510C Liquid -Liquid Extraction (Separatory Funnel) SW846 EET SEA 3546 Microwave Extraction SW846 EET DEN 3546 Microwave Extraction SW846 EET SEA 3550C Ultrasonic Extraction SW846 EET DEN 5030B Purge and Trap SW846 EET SEA 5030C Purge and Trap SW846 EET DEN 5035 Closed System Purge and Trap SW846 EET SEA 7470A Preparation, Mercury SW846 EET DEN 7471 B Preparation, Mercury SW846 EET DEN Increment, prep ISM - Dry, Disaggregate, Sieve, 2 D Slabcake Subsample EPA EET DEN Protocol References: ASTM = ASTM International EPA = US Environmental Protection Agency NWTPH = Northwest Total Petroleum Hydrocarbon SW846 ='Test Methods For Evaluating Solid Waste, Physical/Chemical Methods", Third Edition, November 1986 And Its Updates. Laboratory References: EET DEN = Eurofins Denver, 4955 Yarrow Street, Arvada, CO 80002, TEL (303)736-0100 EET SEA = Eurofins Seattle, 5755 8th Street East, Tacoma, WA 98424, TEL (253)922-2310 Eurofins Denver Page 19 of 160 6/1/2023 Sample Summary Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Lab Sample ID Client Sample ID Matrix 280-176200-1 DU05-SU05-230505-Pond01 Water 280-176200-2 DU05-SU05-230505-Pond02 Water 280-176200-3 DU05-SU06-230505-COMP01 Solid 280-176200-4 DU05-SU06-230505-COMP02 Solid 280-176200-5 B03-19GW Water 280-176200-6 B02-15GW Water 280-176200-7 B03-17 Solid 280-176200-8 B02-8 Solid 280-176200-9 TB-230507-01 Water 280-176200-10 DU07-230502-Native Solid 280-176200-11 DU07-230502-Fill Solid 280-176200-12 DU04-SU02-230504-0.5 Solid 280-176200-13 DU04-SU01-230504-0.5 Solid 280-176200-14 DU06-SU03-230504-0.5 Solid 280-176200-15 DU01-230504-0.5 Solid 280-176200-16 DU01-230504-0.5-Rep1 Solid 280-176200-17 DU01-230504-0.5-Rep2 Solid 280-176200-18 DU02-230504-0.5 Solid 280-176200-19 TB-230507-02 Water 280-176200-20 DU06-SU04-230505-0.5 Solid 280-176200-21 DU03-230505-0.5 Solid 280-176200-22 DU03-230505-0.5-Rep1 Solid 280-176200-23 DU03-230505-0.5-Rep2 Solid Collected Received 05/05/23 10:00 05/09/23 09:15 05/05/23 10:05 05/09/23 09:15 05/05/23 10:20 05/09/23 09:15 05/05/23 10:25 05/09/23 09:15 05/03/23 14:00 05/09/23 09:15 05/03/23 15:00 05/09/23 09:15 05/03/23 13:15 05/09/23 09:15 05/03/23 13:30 05/09/23 09:15 05/07/23 11:00 05/09/23 09:15 05/02/23 18:30 05/09/23 09:15 05/02/23 18:45 05/09/23 09:15 05/04/23 14:00 05/09/23 09:15 05/04/23 14:45 05/09/23 09:15 05/04/23 15:30 05/09/23 09:15 05/04/23 16:15 05/09/23 09:15 05/04/23 16:25 05/09/23 09:15 05/04/23 16:35 05/09/23 09:15 05/04/23 17:00 05/09/23 09:15 05/07/23 12:00 05/09/23 09:15 05/05/23 10:45 05/09/23 09:15 05/05/23 11:15 05/09/23 09:15 05/05/23 11:20 05/09/23 09:15 05/05/23 11:25 05/09/23 09:15 Job ID: 280-176200-1 17 Page 20 of 160 Eurofins(P¢/pM3 Client Sample Results Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Method: SW846 8260D - Volatile Organic Compounds by GC/MS Client Sample ID: DU05-SU05-230505-Pond01 Date Collected: 05/05/23 10:00 Date Received: 05/09/23 09:15 Analyte Result Qualifier Acetone 11 J 2-Butanone (MEK) ND Benzene ND Chlorobenzene ND Carbon disulfide ND Carbon tetrachloride ND Cyclohexane ND 1,2-Dibromo-3-Chloropropane ND Bromomethane ND Bromoform ND Chloroethane ND Chloroform ND Chlorobromomethane ND Dichlorobromomethane ND Chlorodibromomethane ND Isopropylbenzene ND 2-Hexanone ND Chloromethane ND Dichlorodifluoromethane ND trans-1,2-Dichloroethene ND trans-1,3-Dichloropropene ND Methylene Chloride ND Methyl acetate ND Methyl tert-butyl ether ND 4-Methyl-2-pentanone (MIBK) ND Methylcyclohexane ND Styrene ND 1,1,2,2-Tetrachloroethane ND 1,2,3-Trichlorobenzene ND 1,2,4-Trichlorobe nzene ND Toluene 1.4 1,1,1-Trichloroethane ND 1,1,2-Trichloroethane ND Trichloroethene ND 1,1,2-Trichloro-1,2,2-tdfluoroethane ND Vinyl chloride ND m-Xylene & p-Xylene ND o-Xylene ND Tetrachloroethene ND 1,2-Dichlorobenzene ND 1,3-Dichlorobenzene ND 1,4-Dichlorobenzene ND cis- 1,2-Dichloroethene ND cis-1,3-Dichloropropene ND 1,1-Dichloroethane ND 1,1-Dichloroethene ND 1,2-Dichloroethane ND 1,2-Dichloropropane ND 1,4-Dioxane ND Job ID: 280-176200-1 Lab Sample ID: 280-176200-1 Matrix: Water RL MDL Unit D Prepared Analyzed Dil Fac 15 6.6 ug/L 05/18/23 01:M 1 15 6.0 ug/L 05/18/23 01:26 1 1.0 0.31 ug/L 05/18/23 01:26 1 1.0 0.42 ug/L 05/18/23 01:26 1 2.0 0.63 ug/L 05/18/23 01:26 1 1.0 0.57 ug/L 05/18/23 01:26 1 1.0 0.44 ug/L 05/18/23 01:26 1 5.0 1.8 ug/L 05/18/23 01:26 1 5.0 2.4 ug/L 05/18/23 01:26 1 2.0 1.2 ug/L 05/18/23 01:26 1 4.0 1.4 ug/L 05/18/23 01:26 1 1.0 0.36 ug/L 05/18/23 01:26 1 1.0 0.40 ug/L 05/18/23 01:26 1 1.0 0.39 ug/L 05/18/23 01:26 1 2.0 0.62 ug/L 05/18/23 01:26 1 1.0 0.36 ug/L 05/18/23 01:26 1 5.0 1.7 ug/L 05/18/23 01:26 1 2.0 0.75 ug/L 05/18/23 01:26 1 3.0 0.96 ug/L 05/18/23 01:26 1 1.0 0.37 ug/L 05/18/23 01:26 1 2.0 0.65 ug/L 05/18/23 01:26 1 2.0 0.94 ug/L 05/18/23 01:26 1 5.0 1.6 ug/L 05/18/23 01:26 1 5.0 0.25 ug/L 05/18/23 01:26 1 5.0 0.98 ug/L 05/18/23 01:26 1 1.0 0.31 ug/L 05/18/23 01:26 1 1.0 0.36 ug/L 05/18/23 01:26 1 1.0 0.21 ug/L 05/18/23 01:26 1 2.0 0.70 ug/L 05/18/23 01:26 1 1.0 0.58 ug/L 05/18/23 01:26 1 1.0 0.32 ug/L 05/18/23 01:26 1 1.0 0.39 ug/L 05/18/23 01:26 1 1.0 0.27 ug/L 05/18/23 01:26 1 1.0 0.30 ug/L 05/18/23 01:26 1 3.0 0.73 ug/L 05/18/23 01:26 1 2.0 0.51 ug/L 05/18/23 01:26 1 2.0 0.36 ug/L 05/18/23 01:26 1 1.0 0.33 ug/L 05/18/23 01:26 1 1.0 0.40 ug/L 05/18/23 01:26 1 1.0 0.37 ug/L 05/18/23 01:26 1 1.0 0.33 ug/L 05/18/23 01:26 1 1.0 0.39 ug/L 05/18/23 01:26 1 1.0 0.32 ug/L 05/18/23 01:26 1 2.0 0.63 ug/L 05/18/23 01:26 1 1.0 0.22 ug/L 05/18/23 01:26 1 1.0 0.23 ug/L 05/18/23 01:26 1 1.0 0.54 ug/L 05/18/23 01:26 1 1.0 0.52 ug/L 05/18/23 01:26 1 150 19 ug/L 05/18/23 01:26 1 Eurofins Denver Page 21 of 160 6/1 /2023 Client Sample Results Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon Method: SW846 8260D - Volatile Orqanic Compounds by GC/MS (Continued) Client Sample ID: DU05-SU05-230505-Pond01 Lab Sample ID: 280-176200-1 Date Collected: 05/05/23 10:00 Matrix: Water Date Received: 05/09/23 09:15 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Ethylbenzene ND 1.0 0.30 ug/L 05/18/23 01:26 1 Ethylene Dibromide ND 1.0 0.40 ug/L 05/18/23 01:26 1 Trichlorofluoromethane ND 2.0 0.57 ug/L 05/18/23 01:26 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 1,2-Dichloroethane-d4 (Surr) 100 70- 127 05/18/23 01:26 1 Toluene-d8 (Surr) 103 80-125 05/18/23 01:26 1 4-Bromofluorobenzene (Surr) 101 78-120 05/18/23 01:26 1 LDibromofluoromethane (Surr) 98 77-120 05118123 01:26 1 Client Sample ID: DU05-SU05-230505-Pond02 Date Collected: 05/05/23 10:05 Date Received: 05/09/23 09:15 Analyte Result Qualifier Acetone 6.7 J 2-Butanone (MEK) ND Benzene ND Chlorobenzene ND Carbon disulfide ND Carbon tetrachloride ND Cyclohexane ND 1,2-Dibromo-3-Chloropropane ND Bromomethane ND Bromoform ND Chloroethane ND Chloroform ND Chlorobromomethane ND Dichlorobromomethane ND Chlorodibromomethane ND Isopropylbenzene ND 2-Hexanone ND Chloromethane ND Dichlorodifluoromethane ND trans-1,2-Dichloroethene ND trans-1,3-Dichloropropene ND Methylene Chloride ND Methyl acetate ND Methyl tert-butyl ether ND 4-Methyl-2-pentanone (MIBK) ND Methylcyclohexane ND Styrene ND 1,1,2,2-Tetrachloroethane ND 1,2,3-Trichlorobenzene ND 1,2,4-Trichlorobenzene ND Toluene ND 1,1,1-Trichloroethane ND 1,1,2-Trichloroethane ND Trichloroethene ND 1,1,2-Trichloro-1,2,2-thfluoroethane ND Vinyl chloride ND Lab Sample ID: 280-176200-2 Matrix: Water RL MDL Unit D Prepared Analyzed Dil Fac 15 6.6 ug/L 05/18/23 01:46 1 15 6.0 ug/L 05/18/23 01:46 1 1.0 0.31 ug/L 05/18/23 01:46 1 1.0 0.42 ug/L 05/18/23 01:46 1 2.0 0.63 ug/L 05/18/23 01:46 1 1.0 0.57 ug/L 05/18/23 01:46 1 1.0 0.44 ug/L 05/18/23 01:46 1 5.0 1.8 ug/L 05/18/23 01:46 1 5.0 2.4 ug/L 05/18/23 01:46 1 2.0 1.2 ug/L 05/18/23 01:46 1 4.0 1.4 ug/L 05/18/23 01:46 1 1.0 0.36 ug/L 05/18/23 01:46 1 1.0 0.40 ug/L 05/18/23 01:46 1 1.0 0.39 ug/L 05/18/23 01:46 1 2.0 0.62 ug/L 05/18/23 01:46 1 1.0 0.36 ug/L 05/18/23 01:46 1 5.0 1.7 ug/L 05/18/23 01:46 1 2.0 0.75 ug/L 05/18/23 01:46 1 3.0 0.96 ug/L 05/18/23 01:46 1 1.0 0.37 ug/L 05/18/23 01:46 1 2.0 0.65 ug/L 05/18/23 01:46 1 2.0 0.94 ug/L 05/18/23 01:46 1 5.0 1.6 ug/L 05/18/23 01:46 1 5.0 0.25 ug/L 05/18/23 01:46 1 5.0 0.98 ug/L 05/18/23 01:46 1 1.0 0.31 ug/L 05/18/23 01:46 1 1.0 0.36 ug/L 05/18/23 01:46 1 1.0 0.21 ug/L 05/18/23 01:46 1 2.0 0.70 ug/L 05/18/23 01:46 1 1.0 0.58 ug/L 05/18/23 01:46 1 1.0 0.32 ug/L 05/18/23 01:46 1 1.0 0.39 ug/L 05/18/23 01:46 1 1.0 0.27 ug/L 05/18/23 01:46 1 1.0 0.30 ug/L 05/18/23 01:46 1 3.0 0.73 ug/L 05/18/23 01:46 1 2.0 0.51 ug/L 05/18/23 01:46 1 Eurofins Denver Page 22 of 160 6/1 /2023 Client Sample Results Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Method: SW846 8260D - Volatile Organic Compounds by GUMS (Continued) Job ID: 280-176200-1 Client Sample ID: DU05-SU05-230505-Pond02 Lab Sample ID: 280-176200-2 Date Collected: 05/05/23 10:05 Matrix: Water Date Received: 05/09/23 09:15 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac m-Xylene & p-Xylene ND 2.0 0.36 ug/L 05/18/23 01:46 1 o-Xylene ND 1.0 0.33 ug/L 05/18/23 01:46 1 Tetrachloroethene ND 1.0 0.40 ug/L 05/18/23 01:46 1 1,2-Dichlorobenzene ND 1.0 0.37 ug/L 05/18/23 01:46 1 1,3-Dichlorobenzene ND 1.0 0.33 ug/L 05/18/23 01:46 1 1,4-Dichlorobenzene ND 1.0 0.39 ug/L 05/18/23 01:46 1 cis-1,2-Dichloroethene ND 1.0 0.32 ug/L 05/18/23 01:46 1 cisA,3-Dichloropropene ND 2.0 0.63 ug/L 05/18/23 01:46 1 1,1-Dichloroethane ND 1.0 0.22 ug/L 05/18/23 01:46 1 1,1-Dichloroethene ND 1.0 0.23 ug/L 05/18/23 01:46 1 1,2-Dichloroethane ND 1.0 0.54 ug/L 05/18/23 01:46 1 1,2-Dichloropropane ND 1.0 0.52 ug/L 05/18/23 01:46 1 1,4-Dioxane ND 150 19 ug/L 05/18/23 01:46 1 Ethylbenzene ND 1.0 0.30 ug/L 05/18/23 01:46 1 Ethylene Dibromide ND 1.0 0.40 ug/L 05/18/23 01:46 1 Trichlorofluoromethane ND 2.0 0.57 ug/L 05/18/23 01:46 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 1,2-Dichloroethane-d4 (Surr) 100 70-127 05118123 01.46 1 Toluene-d8 (Surr) 103 80 -125 05118123 01.46 1 4-Bromofluorobenzene (Surr) 102 78 -120 05118123 01:46 1 Dibromofluoromethane (Surr) 97 77-120 05118123 01:46 1 Client Sample ID: B03-19GW Date Collected: 05/03/23 14:00 Date Received: 05/09/23 09:15 Analyte Result Qualifier RL MDL Unit Lab Sample ID: 280-176200-5 Matrix: Water D Prepared Analyzed Dil Fac Acetone ND 15 6.6 ug/L 05/16/23 04:28 1 2-Butanone (MEK) ND 15 6.0 ug/L 05/16/23 04:28 1 Benzene ND 1.0 0.31 ug/L 05/16/23 04:28 1 Chlorobenzene ND 1.0 0.42 ug/L 05/16/23 04:28 1 Carbon disulfide ND 2.0 0.63 ug/L 05/16/23 04:28 1 Carbon tetrachloride ND 1.0 0.57 ug/L 05/16/23 04:28 1 Cyclohexane ND 1.0 0.44 ug/L 05/16/23 04:28 1 1,2-Dibromo-3-Chloropropane ND 5.0 1.8 ug/L 05/16/23 04:28 1 Bromomethane ND 5.0 2.4 ug/L 05/16/23 04:28 1 Bromoform ND 2.0 1.2 ug/L 05/16/23 04:28 1 Chloroethane ND 4.0 1.4 ug/L 05/16/23 04:28 1 Chloroform ND 1.0 0.36 ug/L 05/16/23 04:28 1 Chlorobromomethane ND 1.0 0.40 ug/L 05/16/23 04:28 1 Dichlorobromomethane ND 1.0 0.39 ug/L 05/16/23 04:28 1 Chlorodibromomethane ND 2.0 0.62 ug/L 05/16/23 04:28 1 Isopropylbenzene ND 1.0 0.36 ug/L 05/16/23 04:28 1 2-Hexanone ND 5.0 1.7 ug/L 05/16/23 04:28 1 Chloromethane ND 2.0 0.75 ug/L 05/16/23 04:28 1 Dichlorodifluoromethane ND 3.0 0.96 ug/L 05/16/23 04:28 1 trans-1,2-Dichloroethene ND 1.0 0.37 ug/L 05/16/23 04:28 1 trans-1,3-Dichloropropene ND 2.0 0.65 ug/L 05/16/23 04:28 1 Methylene Chloride ND 2.0 0.94 ug/L 05/16/23 04:28 1 Methyl acetate ND 5.0 1.6 ug/L 05/16/23 04:28 1 Eurofins Denver Page 23 of 160 6/1/2023 Client Sample Results Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Job ID: 280-176200-1 Method: SW846 8260D - Volatile Organic Compounds by GC/MS (Continued) Client Sample ID: B03-19GW Lab Sample ID: 280-176200-5 Date Collected: 05/03/23 14:00 Matrix: Water Date Received: 05/09/23 09:15 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Methyl tert-butyl ether ND 5.0 0.25 ug/L 05/16/23 04:28 1 4-Methyl-2-pentanone (MIBK) ND 5.0 0.98 ug/L 05/16/23 04:28 1 Methylcyclohexane ND 1.0 0.31 ug/L 05/16/23 04:28 1 Styrene ND 1.0 0.36 ug/L 05/16/23 04:28 1 1,1,2,2-Tetrachloroethane ND 1.0 0.21 ug/L 05/16/23 04:28 1 1,2,3-Trichlorobenzene ND 2.0 0.70 ug/L 05/16/23 04:28 1 1,2,4-Trichlorobenzene ND 1.0 0.58 ug/L 05/16/23 04:28 1 Toluene 0.33 J 1.0 0.32 ug/L 05/16/23 04:28 1 1,1,1-Trichloroethane ND 1.0 0.39 ug/L 05/16/23 04:28 1 1,1,2-Trichloroethane ND 1.0 0.27 ug/L 05/16/23 04:28 1 Trichloroethene ND 1.0 0.30 ug/L 05/16/23 04:28 1 1,1,2-Trichloro-1,2,2-tdfluoroethane ND 3.0 0.73 ug/L 05/16/23 04:28 1 Vinyl chloride ND 2.0 0.51 ug/L 05/16/23 04:28 1 m-Xylene & p-Xylene ND 2.0 0.36 ug/L 05/16/23 04:28 1 o-Xylene ND 1.0 0.33 ug/L 05/16/23 04:28 1 Tetrachloroethene ND 1.0 0.40 ug/L 05/16/23 04:28 1 1,2-Dichlorobenzene ND 1.0 0.37 ug/L 05/16/23 04:28 1 1,3-Dichlorobenzene ND 1.0 0.33 ug/L 05/16/23 04:28 1 1,4-Dichlorobenzene ND 1.0 0.39 ug/L 05/16/23 04:28 1 cis-1,2-Dichloroethene ND 1.0 0.32 ug/L 05/16/23 04:28 1 cis- 1,3-Dichloropropene ND 2.0 0.63 ug/L 05/16/23 04:28 1 1,1-Dichloroethane ND 1.0 0.22 ug/L 05/16/23 04:28 1 1,1-Dichloroethene ND 1.0 0.23 ug/L 05/16/23 04:28 1 1,2-Dichloroethane ND 1.0 0.54 ug/L 05/16/23 04:28 1 1,2-Dichloropropane ND 1.0 0.52 ug/L 05/16/23 04:28 1 1,4-Dioxane ND 150 19 ug/L 05/16/23 04:28 1 Ethylbenzene ND 1.0 0.30 ug/L 05/16/23 04:28 1 Ethylene Dibromide ND 1.0 0.40 ug/L 05/16/23 04:28 1 Trichlorofluoromethane ND 2.0 0.57 ug/L 05/16/23 04:28 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 1,2-Dichloroethane-d4 (Surr) 98 70-127 05/16/23 04.28 1 Toluene-d8 (Surr) 100 80 -125 05/16/23 04:28 1 4-Bromoi7uorobenzene (Surr) 100 78-120 05/16/23 04:28 1 Dibromofluoromethane (Surr) 98 77-120 05/16/23 04:28 1 Client Sample ID: B02-15GW Lab Sample ID: 280-176200-6 Date Collected: 05/03/23 15:00 Matrix: Water Date Received: 05/09/23 09:15 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Acetone 40 15 6.6 ug/L 05/16/23 01:11 1 2-Butanone (MEK) ND 15 6.0 ug/L 05/16/23 01:11 1 Benzene ND 1.0 0.31 ug/L 05/16/23 01:11 1 Chlorobenzene ND 1.0 0.42 ug/L 05/16/23 01:11 1 Carbon disulfide ND 2.0 0.63 ug/L 05/16/23 01:11 1 Carbon tetrachloride ND 1.0 0.57 ug/L 05/16/23 01:11 1 Cyclohexane ND 1.0 0.44 ug/L 05/16/23 01:11 1 1,2-Dibromo-3-Chloropropane ND 5.0 1.8 ug/L 05/16/23 01:11 1 Bromomethane ND 5.0 2.4 ug/L 05/16/23 01:11 1 Bromoform ND 2.0 1.2 ug/L 05/16/23 01:11 1 Eurofins Denver Page 24 of 160 6/1/2023 Client Sample Results Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon Method: SW846 8260D - Volatile Organic Compounds by GC/MS (Continued) Client Sample ID: B02-15GW Lab Sample ID: 280-176200-6 Date Collected: 05/03/23 15:00 Matrix: Water Date Received: 05/09/23 09:15 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Chloroethane ND 4.0 1.4 ug/L 05/16/23 01:11 1 Chloroform ND 1.0 0.36 ug/L 05/16/23 01:11 1 Chlorobromomethane ND 1.0 0.40 ug/L 05/16/23 01:11 1 Dichlorobromomethane ND 1.0 0.39 ug/L 05/16/23 01:11 1 Chlorodibromomethane ND 2.0 0.62 ug/L 05/16/23 01:11 1 Isopropylbenzene ND 1.0 0.36 ug/L 05/16/23 01:11 1 2-Hexanone ND 5.0 1.7 ug/L 05/16/23 01:11 1 Chloromethane ND 2.0 0.75 ug/L 05/16/23 01:11 1 Dichlorodifluoromethane ND 3.0 0.96 ug/L 05/16/23 01:11 1 trans-1,2-Dichloroethene ND 1.0 0.37 ug/L 05/16/23 01:11 1 trans-1,3-Dichloropropene ND 2.0 0.65 ug/L 05/16/23 01:11 1 Methylene Chloride ND 2.0 0.94 ug/L 05/16/23 01:11 1 Methyl acetate ND 5.0 1.6 ug/L 05/16/23 01:11 1 Methyl tert-butyl ether ND 5.0 0.25 ug/L 05/16/23 01:11 1 4-Methyl-2-pentanone (MIBK) ND 5.0 0.98 ug/L 05/16/23 01:11 1 Methylcyclohexane ND 1.0 0.31 ug/L 05/16/23 01:11 1 Styrene ND 1.0 0.36 ug/L 05/16/23 01:11 1 1,1,2,2-Tetrachloroethane ND 1.0 0.21 ug/L 05/16/23 01:11 1 1,2,3-Trichlorobenzene ND 2.0 0.70 ug/L 05/16/23 01:11 1 1,2,4-Trichlorobenzene ND 1.0 0.58 ug/L 05/16/23 01:11 1 Toluene ND 1.0 0.32 ug/L 05/16/23 01:11 1 1,1,1-Trichloroethane ND 1.0 0.39 ug/L 05/16/23 01:11 1 1,1,2-Trichloroethane ND 1.0 0.27 ug/L 05/16/23 01:11 1 Trichloroethene ND 1.0 0.30 ug/L 05/16/23 01:11 1 1,1,2-Trichloro-1,2,2-tdfluoroethane ND 3.0 0.73 ug/L 05/16/23 01:11 1 Vinyl chloride ND 2.0 0.51 ug/L 05/16/23 01:11 1 m-Xylene & p-Xylene ND 2.0 0.36 ug/L 05/16/23 01:11 1 o-Xylene ND 1.0 0.33 ug/L 05/16/23 01:11 1 Tetrachloroethene ND 1.0 0.40 ug/L 05/16/23 01:11 1 1,2-Dichlorobenzene ND 1.0 0.37 ug/L 05/16/23 01:11 1 1,3-Dichlorobenzene ND 1.0 0.33 ug/L 05/16/23 01:11 1 1,4-Dichlorobenzene ND 1.0 0.39 ug/L 05/16/23 01:11 1 cis-1,2-Dichloroethene ND 1.0 0.32 ug/L 05/16/23 01:11 1 cis- 1,3-Dichloropropene ND 2.0 0.63 ug/L 05/16/23 01:11 1 1,1-Dichloroethane ND 1.0 0.22 ug/L 05/16/23 01:11 1 1,1-Dichloroethene ND 1.0 0.23 ug/L 05/16/23 01:11 1 1,2-Dichloroethane ND 1.0 0.54 ug/L 05/16/23 01:11 1 1,2-Dichloropropane ND 1.0 0.52 ug/L 05/16/23 01:11 1 1,4-Dioxane ND 150 19 ug/L 05/16/23 01:11 1 Ethylbenzene ND 1.0 0.30 ug/L 05/16/23 01:11 1 Ethylene Dibromide ND 1.0 0.40 ug/L 05/16/23 01:11 1 Trichlorofluoromethane ND 2.0 0.57 ug/L 05/16/23 01:11 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 1,2-Dichloroethane-d4 (Surr) 103 70-127 05116123 01:11 1 Toluene-d8 (Surr) 96 80 -125 05/16/23 01:11 1 4-Bromofluorobenzene (Surr) 102 78-120 05/16/23 01:11 1 Dibromofluoromethane (Surr) 107 77- 120 05116123 01:11 1 Eurofins Denver Page 25 of 160 6/1/2023 Client Sample Results Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Method: SW846 8260D - Volatile Organic Compounds by GC/MS Job ID: 280-176200-1 Client Sample ID: TB-230507-01 Lab Sample ID: 280-176200-9 Date Collected: 05/07/23 11:00 Matrix: Water Date Received: 05/09/23 09:15 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Acetone ND 15 6.6 ug/L 05/18/23 01:00 1 2-Butanone (MEK) ND 15 6.0 ug/L 05/18/23 01:00 1 Benzene ND 1.0 0.31 ug/L 05/18/23 01:00 1 Chlorobenzene ND 1.0 0.42 ug/L 05/18/23 01:00 1 Carbon disulfide ND 2.0 0.63 ug/L 05/18/23 01:00 1 Carbon tetrachloride ND 1.0 0.57 ug/L 05/18/23 01:00 1 Cyclohexane ND 1.0 0.44 ug/L 05/18/23 01:00 1 1,2-Dibromo-3-Chloropropane ND 5.0 1.8 ug/L 05/18/23 01:00 1 Bromomethane ND 5.0 2.4 ug/L 05/18/23 01:00 1 Bromoform ND 2.0 1.2 ug/L 05/18/23 01:00 1 Chloroethane ND 4.0 1.4 ug/L 05/18/23 01:00 1 Chloroform ND 1.0 0.36 ug/L 05/18/23 01:00 1 Chlorobromomethane ND 1.0 0.40 ug/L 05/18/23 01:00 1 Dichlorobromomethane ND 1.0 0.39 ug/L 05/18/23 01:00 1 Chlorodibromomethane ND 2.0 0.62 ug/L 05/18/23 01:00 1 Isopropylbenzene ND 1.0 0.36 ug/L 05/18/23 01:00 1 2-Hexanone ND 5.0 1.7 ug/L 05/18/23 01:00 1 Chloromethane ND 2.0 0.75 ug/L 05/18/23 01:00 1 Dichlorodifluoromethane ND 3.0 0.96 ug/L 05/18/23 01:00 1 trans-1,2-Dichloroethene ND 1.0 0.37 ug/L 05/18/23 01:00 1 trans-1,3-Dichloropropene ND 2.0 0.65 ug/L 05/18/23 01:00 1 Methylene Chloride ND 2.0 0.94 ug/L 05/18/23 01:00 1 Methyl acetate ND 5.0 1.6 ug/L 05/18/23 01:00 1 Methyl tert-butyl ether ND 5.0 0.25 ug/L 05/18/23 01:00 1 4-Methyl-2-pentanone (MIBK) ND 5.0 0.98 ug/L 05/18/23 01:00 1 Methylcyclohexane ND 1.0 0.31 ug/L 05/18/23 01:00 1 Styrene ND 1.0 0.36 ug/L 05/18/23 01:00 1 1,1,2,2-Tetrachloroethane ND 1.0 0.21 ug/L 05/18/23 01:00 1 1,2,3-Trichlorobenzene ND 2.0 0.70 ug/L 05/18/23 01:00 1 1,2,4-Trichlorobenzene ND 1.0 0.58 ug/L 05/18/23 01:00 1 Toluene ND 1.0 0.32 ug/L 05/18/23 01:00 1 1,1,1-Trichloroethane ND 1.0 0.39 ug/L 05/18/23 01:00 1 1,1,2-Trichloroethane ND 1.0 0.27 ug/L 05/18/23 01:00 1 Trichloroethene ND 1.0 0.30 ug/L 05/18/23 01:00 1 1,1,2-Trichloro-1,2,2-tdfluoroethane ND 3.0 0.73 ug/L 05/18/23 01:00 1 Vinyl chloride ND 2.0 0.51 ug/L 05/18/23 01:00 1 m-Xylene & p-Xylene ND 2.0 0.36 ug/L 05/18/23 01:00 1 o-Xylene ND 1.0 0.33 ug/L 05/18/23 01:00 1 Tetrachloroethene ND 1.0 0.40 ug/L 05/18/23 01:00 1 1,2-Dichlorobenzene ND 1.0 0.37 ug/L 05/18/23 01:00 1 1,3-Dichlorobenzene ND 1.0 0.33 ug/L 05/18/23 01:00 1 1,4-Dichlorobenzene ND 1.0 0.39 ug/L 05/18/23 01:00 1 cis- 1,2-Dichloroethene ND 1.0 0.32 ug/L 05/18/23 01:00 1 cis- 1,3-Dichloropropene ND 2.0 0.63 ug/L 05/18/23 01:00 1 1,1-Dichloroethane ND 1.0 0.22 ug/L 05/18/23 01:00 1 1,1-Dichloroethene ND 1.0 0.23 ug/L 05/18/23 01:00 1 1,2-Dichloroethane ND 1.0 0.54 ug/L 05/18/23 01:00 1 1,2-Dichloropropane ND 1.0 0.52 ug/L 05/18/23 01:00 1 1,4-Dioxane ND 150 19 ug/L 05/18/23 01:00 1 Eurofins Denver L�] 73 Page 26 of 160 6/1/2023 Client Sample Results Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon - 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Method: SW846 8260D - Volatile Orqanic Compounds by GC/MS (Continued) Client Sample ID: TB-230507-01 Lab Sample ID: 280-176200-9 Date Collected: 05/07/23 11:00 Matrix: Water Date Received: 05/09/23 09:15 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Ethylbenzene ND 1.0 0.30 ug/L 05/18/23 01:00 1 Ethylene Dibromide ND 1.0 0.40 ug/L 05/18/23 01:00 1 Trichlorofluoromethane ND 2.0 0.57 ug/L 05/18/23 01:00 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 1,2-Dichloroethane-d4 (Surr) 94 70-127 05/18/23 01:00 1 Toluene-d8 (Surr) 104 80 -125 05118123 01:00 1 4-Bromofluorobenzene (Surr) 104 78-120 05118123 01:00 1 Dibromofluoromethane (Surr) 96 77-120 05/18/23 01:00 1 Client Sample ID: TB-230507-02 Lab Sample ID: 280-176200-19 Date Collected: 05/07/23 12:00 Matrix: Water Date Received: 05/09/23 09:15 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Acetone ND 15 6.6 ug/L 05/18/23 01:22 1 2-Butanone (MEK) ND 15 6.0 ug/L 05/18/23 01:22 1 Benzene ND 1.0 0.31 ug/L 05/18/23 01:22 1 Chlorobenzene ND 1.0 0.42 ug/L 05/18/23 01:22 1 Carbon disulfide ND 2.0 0.63 ug/L 05/18/23 01:22 1 Carbon tetrachloride ND 1.0 0.57 ug/L 05/18/23 01:22 1 Cyclohexane ND 1.0 0.44 ug/L 05/18/23 01:22 1 1,2-Dibromo-3-Chloropropane ND 5.0 1.8 ug/L 05/18/23 01:22 1 Bromomethane ND 5.0 2.4 ug/L 05/18/23 01:22 1 Bromoform ND 2.0 1.2 ug/L 05/18/23 01:22 1 Chloroethane ND 4.0 1.4 ug/L 05/18/23 01:22 1 Chloroform ND 1.0 0.36 ug/L 05/18/23 01:22 1 Chlorobromomethane ND 1.0 0.40 ug/L 05/18/23 01:22 1 Dichlorobromomethane ND 1.0 0.39 ug/L 05/18/23 01:22 1 Chlorodibromomethane ND 2.0 0.62 ug/L 05/18/23 01:22 1 Isopropylbenzene ND 1.0 0.36 ug/L 05/18/23 01:22 1 2-Hexanone ND 5.0 1.7 ug/L 05/18/23 01:22 1 Chloromethane ND 2.0 0.75 ug/L 05/18/23 01:22 1 Dichlorodifluoromethane ND 3.0 0.96 ug/L 05/18/23 01:22 1 trans-1,2-Dichloroethene ND 1.0 0.37 ug/L 05/18/23 01:22 1 trans-1,3-Dichloropropene ND 2.0 0.65 ug/L 05/18/23 01:22 1 Methylene Chloride ND 2.0 0.94 ug/L 05/18/23 01:22 1 Methyl acetate ND 5.0 1.6 ug/L 05/18/23 01:22 1 Methyl tert-butyl ether ND 5.0 0.25 ug/L 05/18/23 01:22 1 4-Methyl-2-pentanone (MIBK) ND 5.0 0.98 ug/L 05/18/23 01:22 1 Methylcyclohexane ND 1.0 0.31 ug/L 05/18/23 01:22 1 Styrene ND 1.0 0.36 ug/L 05/18/23 01:22 1 1,1,2,2-Tetrachloroethane ND 1.0 0.21 ug/L 05/18/23 01:22 1 1,2,3-Trichlorobenzene ND 2.0 0.70 ug/L 05/18/23 01:22 1 1,2,4-Trichlorobenzene ND 1.0 0.58 ug/L 05/18/23 01:22 1 Toluene ND 1.0 0.32 ug/L 05/18/23 01:22 1 1,1,1-Trichloroethane ND 1.0 0.39 ug/L 05/18/23 01:22 1 1,1,2-Trichloroethane ND 1.0 0.27 ug/L 05/18/23 01:22 1 Trichloroethene ND 1.0 0.30 ug/L 05/18/23 01:22 1 1,1,2-Trichloro-1,2,2-trifluoroethane ND 3.0 0.73 ug/L 05/18/23 01:22 1 Vinyl chloride ND 2.0 0.51 ug/L 05/18/23 01:22 1 Eurofins Denver Page 27 of 160 6/1/2023 Client Sample Results Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Method: SW846 8260D - Volatile Organic Compounds Client Sample ID: TB-230507-02 Date Collected: 05/07/23 12:00 Date Received: 05/09/23 09:15 Analyte Result Qualifier RL m-Xylene & p-Xylene ND 2.0 o-Xylene ND 1.0 Tetrachloroethene ND 1.0 1,2-Dichlorobenzene ND 1.0 1,3-Dichlorobenzene ND 1.0 1,4-Dichlorobenzene ND 1.0 cis- 1,2-Dichloroethene ND 1.0 cis- 1,3-Dichloropropene ND 2.0 1,1-Dichloroethane ND 1.0 1,1-Dichloroethene ND 1.0 1,2-Dichloroethane ND 1.0 1,2-Dichloropropane ND 1.0 1,4-Dioxane ND 150 Ethylbenzene ND 1.0 Ethylene Dibromide ND 1.0 Trichlorofluoromethane ND 2.0 Job ID: 280-176200-1 GC/MS (Continued) Lab Sample ID: 280-176200-19 Matrix: Water MDL Unit 0.36 ug/L 0.33 ug/L 0.40 ug/L 0.37 ug/L 0.33 ug/L 0.39 ug/L 0.32 ug/L 0.63 ug/L 0.22 ug/L 0.23 ug/L 0.54 ug/L 0.52 ug/L 19 ug/L 0.30 ug/L 0.40 ug/L 0.57 ug/L Surrogate %Recovery Qualifier Limits 1,2-Dichloroethane-d4 (Surr) 94 70-127 Toluene -dB (Surr) 104 80-125 4-Bromofluorobenzene (Surr) 102 78 -120 Dibromofluoromethane (Surr) 96 77-120 Method: NWTPH-Gx - Northwest - Volatile Petroleum Products (GI Client Sample ID: DU05-SU05-230505-Pond01 Date Collected: 05/05/23 10:00 Date Received: 05/09/23 09:15 Analyte Result Qualifier RL MDL Unit Gasoline ND 0.050 0.014 mg/L Surrogate %Recovery Qualifier Limits 4-Bromofluorobenzene (Surr) 88 77-123 Client Sample ID: DU05-SU05-230505-Pond02 Date Collected: 05/05/23 10:05 Date Received: 05/09/23 09:15 Analyte Result Qualifier RL MDL Unit Gasoline ND 0.050 0.014 mg/L Surrogate %Recovery Qualifier Limits 4-Bromofluorobenzene (Surr) 92 77-123 Client Sample ID: DU05-SU06-230505-COMP01 Date Collected: 05/05/23 10:20 Date Received: 05/09/23 09:15 Analyte Result Qualifier RL MDL Unit Gasoline ND 7.1 1.0 mg/Kg Surrogate %Recovery Qualifier Limits 4-Bromofluorobenzene (Surr) 100 66-125 S D Prepared Prepared Analyzed 05/18/23 01:22 05/18/23 01:22 05/18/23 01:22 05/18/23 01:22 05/18/23 01:22 05/18/23 01:22 05/18/23 01:22 05/18/23 01:22 05/18/23 01:22 05/18/23 01:22 05/18/23 01:22 05/18/23 01:22 05/18/23 01:22 05/18/23 01:22 05/18/23 01:22 05/18/23 01:22 Analyzed 05118123 01:22 05/18/23 01:22 05118123 01:22 05118123 01:22 Dil Fac 1 1 1 1 1 1 1 � 1 1 1 1 1 1 1 1 1 Dil Fac 1 1 1 1 Lab Sample ID: 280-176200-1 Matrix: Water D Prepared Analyzed Dil Fac 05/12/23 20:38 1 Prepared Analyzed Dil Fac 05/12/23 20:38 1 Lab Sample ID: 280-176200-2 Matrix: Water D Prepared Analyzed Dil Fac 05/12/23 21:02 1 Prepared Analyzed Dil Fac 05/12/23 21:02 1 Lab Sample ID: 280-176200-3 Matrix: Solid Percent Solids: 82.7 D Prepared Analyzed Dil Fac 05/15/2313:26 05/15/2315:00 1 Prepared Analyzed Dil Fac 0511512313:26 05/15/2315:00 1 Eurofins Denver Page 28 of 160 6/1/2023 Client Sample Results Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon Method: NWTPH-Gx - Northwest - Volatile Petroleum Products (GC/MS) Client Sample ID: DU05-SU06-230505-COMP02 Lab Sample ID: 280-176200-4 Date Collected: 05/05/23 10:25 Matrix: Solid Date Received: 05/09/23 09:15 Percent Solids: 83.5 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Gasoline ND 8.4 1.2 mg/Kg 05/15/2313:26 05/15/2315:24 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 4-Bromofluorobenzene (Surr) 100 66-125 05/15/23 13:26 05115123 15:24 1 Client Sample ID: B03-19GW Lab Sample ID: 280-176200-5 Date Collected: 05/03/23 14:00 Matrix: Water Date Received: 05/09/23 09:15 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Gasoline ND 0.050 0.014 mg/L 05/12/23 21:26 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 4-Bromofluorobenzene (Surr) 83 77-123 05/12/23 21:26 1 Client Sample ID: B02-15GW Lab Sample ID: 280-176200-6 Date Collected: 05/03/23 15:00 Matrix: Water Date Received: 05/09/23 09:15 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac PAW Gasoline ND 0.050 0.014 mg/L 05/12/23 21:50 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 4-Bromofluorobenzene (Surr) 88 77- 123 05/12/23 21:50 1 Client Sample ID: B03-17 Lab Sample ID: 280-176200-7 Date Collected: 05/03/23 13:15 Matrix: Solid Date Received: 05/09/23 09:15 Percent Solids: 86.0 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Gasoline ND 6.2 0.88 mg/Kg � 05/15/2313:26 05/15/2315:48 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 4-Bromofluorobenzene (Surr) 102 66 -125 05115123 13:26 05/15/23 15:48 1 Client Sample ID: B02-8 Lab Sample ID: 280-176200-8 Date Collected: 05/03/23 13:30 Matrix: Solid Date Received: 05/09/23 09:15 Percent Solids: 88.3 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Gasoline ND 5.9 0.84 mg/Kg ia 05/15/2313:26 05/15/2316:12 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 4-Bromofluorobenzene (Surr) 103 66 - 125 05115123 13:26 05/15/23 16:12 1 Method: SW846 8270D SIM - Semivolatile Organic Compounds (GC/MS SIM) Client Sample ID: DU05-SU05-230505-Pond01 Lab Sample ID: 280-176200-1 Date Collected: 05/05/23 10:00 Matrix: Water Date Received: 05/09/23 09:15 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 2-Methyl naphthalene ND 0.10 0.022 ug/L 05/11/23 13:50 05/12/23 14:12 1 Acenaphthene 0.0089 J B 0.10 0.0042 ug/L 05/11/23 13:50 05/12/23 14:12 1 Acenaphthylene 0.0061 J B 0.10 0.0051 ug/L 05/11/23 13:50 05/12/23 14:12 1 Benzo[a]anthracene 0.033 J B 0.10 0.029 ug/L 05/11/23 13:50 05/12/23 14:12 1 Benzo[a]pyrene ND 0.10 0.025 ug/L 05/11/23 13:50 05/12/23 14:12 1 Eurofins Denver Page 29 of 160 6/1/2023 Client Sample Results Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon Method: SW846 8270D SIM - Semivolatile Organic Compounds (GC/MS SIM) (Continued) Client Sample ID: DU05-SU05-230505-Pond01 Lab Sample ID: 280-176200-1 Date Collected: 05/05/23 10:00 Matrix: Water Date Received: 05/09/23 09:15 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Benzo[b]fluoranthene ND 0.10 0.040 ug/L 05/11/23 13:50 05/12/23 14:12 1 Benzo[g,h,i]perylene ND 0.10 0.038 ug/L 05/11/23 13:50 05/12/23 14:12 1 Benzo[k]fluoranthene 0.025 J B 0.10 0.023 ug/L 05/11/23 13:50 05/12/23 14:12 1 Chrysene ND 0.10 0.033 ug/L 05/11/23 13:50 05/12/23 14:12 1 Dibenz(a,h)anthracene ND 0.10 0.028 ug/L 05/11/23 13:50 05/12/23 14:12 1 Fluoranthene ND 0.10 0.049 ug/L 05/11/23 13:50 05/12/23 14:12 1 Fluorene ND 0.10 0.019 ug/L 05/11/23 13:50 05/12/23 14:12 1 Indeno[1,2,3-cd]pyrene ND 0.10 0.040 ug/L 05/11/23 13:50 05/12/23 14:12 1 Naphthalene ND 0.10 0.023 ug/L 05/11/23 13:50 05/12/23 14:12 1 Phenanthrene ND 0.10 0.050 ug/L 05/11/23 13:50 05/12/23 14:12 1 Pyrene ND 0.10 0.045 ug/L 05/11/23 13:50 05/12/23 14:12 1 Anthracene ND 0.10 0.031 ug/L 05/11/2313.50 05/12/23 14:12 1 1-Methylnaphthalene ND 0.10 0.018 ug/L 05/11/23 13:50 05/12/23 14:12 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 2-Fluorobiphenyl 37 26-114 05111123 13:50 05/12/23 14:12 1 Nitrobenzene-d5 39 18-126 05111123 13:50 05112123 14:12 1 Terphenyl-d14 47 36-131 05111123 13.50 05/12/23 14:12 1 Client Sample ID: DU05-SU05-230505-Pond02 Lab Sample ID: 280-176200-2 Date Collected: 05/05/23 10:05 Matrix: Water Date Received: 05/09/23 09:15 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 2-Methylnaphthalene ND 0.11 0.023 ug/L 05/11/23 13:50 05/12/23 13:47 1 Acenaphthene ND 0.11 0.0045 ug/L 05/11/23 13:50 05/12/23 13:47 1 Acenaphthylene ND 0.11 0.0054 ug/L 05/11/23 13:50 05/12/23 13:47 1 Benzo[a]anthrace ne ND 0.11 0.030 ug/L 05/11/23 13:50 05/12/23 13:47 1 Benzo[a]pyrene ND 0.11 0.026 ug/L 05/11/23 13:50 05/12/23 13:47 1 Benzo[b]fluoranthene ND 0.11 0.042 ug/L 05/11/23 13:50 05/12/23 13:47 1 Benzo[g,h,i]perylene ND 0.11 0.040 ug/L 05/11/23 13:50 05/12/23 13:47 1 Benzo[k]fluoranthene ND 0.11 0.024 ug/L 05/11/23 13:50 05/12/23 13:47 1 Chrysene ND 0.11 0.035 ug/L 05/11/23 13:50 05/12/23 13:47 1 Dibenz(a,h)anthracene ND 0.11 0.030 ug/L 05/11/23 13:50 05/12/23 13:47 1 Fluoranthene ND 0.11 0.052 ug/L 05/11/23 13:50 05/12/23 13:47 1 Fluorene ND 0.11 0.020 ug/L 05/11/23 13:50 05/12/23 13:47 1 Indeno[1,2,3-cd]pyrene ND 0.11 0.042 ug/L 05/11/23 13:50 05/12/23 13:47 1 Naphthalene ND 0.11 0.025 ug/L 05/11/23 13:50 05/12/23 13:47 1 Phenanthrene ND 0.11 0.053 ug/L 05/11/23 13:50 05/12/23 13:47 1 Pyrene ND 0.11 0.048 ug/L 05/11/23 13:50 05112/2313:47 1 Anthracene ND 0.11 0.033 ug/L 05111/2313:50 05/12/23 13:47 1 1-Methylnaphthalene ND 0.11 0.020 ug/L 05/11/23 13:50 05/12/23 13:47 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 2-Fluorobiphenyl 42 26-114 05/11/23 13:50 05112123 13:47 1 Nitrobenzene-d5 42 18-126 05/11/23 13:50 05/12/23 13:47 1 Terphenyl-d14 69 36-131 05111123 13:50 05/12/23 13:47 1 Eurofins Denver Page 30 of 160 6/1/2023 Client Sample Results Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Method: SW846 8270D SIM - Semivolatile Organic Compounds (GC/MS SIM) Job ID: 280-176200-1 Client Sample ID: DU05-SU06-230505-COMP01 Lab Sample ID: 280-176200-3 Date Collected: 05/05/23 10:20 Matrix: Solid Date Received: 05/09/23 09:15 Percent Solids: 82.7 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 2-Methyl naphthalene 3.7 J 35 2.2 ug/Kg 05/11/23 12:12 05/16/2313:02 1 Acenaphthene ND 35 3.2 ug/Kg 05/11/23 12:12 05/16/2313:02 1 Acenaphthylene ND 35 2.7 ug/Kg 05/11/23 12:12 05/16/2313:02 1 Benzo[a]anthracene ND 35 6.3 ug/Kg 05/11/23 12:12 05/16/2313:02 1 Benzo[a]pyrene ND 35 5.2 ug/Kg 05/11/23 12:12 05/16/2313:02 1 Benzo[b]fluoranthene ND 35 8.4 ug/Kg 05/11/23 12:12 05/16/2313:02 1 Benzo[g,h,i]perylene 34 J 35 7.7 ug/Kg 05/11/23 12:12 05/16/2313:02 1 Benzo[k]fluoranthene ND 35 7.0 ug/Kg c 05/11/23 12:12 05/16/2313:02 1 Chrysene 9.8 J 35 7.0 ug/Kg a 05/1112312:12 05/16/2313:02 1 Dibenz(a,h)anthracene ND 35 9.1 ug/Kg 05/11/23 12:12 05/16/2313:02 1 Fluoranthene 24 J 35 7.0 ug/Kg o 05111/2312:12 05/16/2313:02 1 Fluorene 9.1 J 35 3.3 ug/Kg 05/11/23 12:12 05/16/2313:02 1 Indeno[1,2,3-cd]pyrene 28 J 35 7.7 ug/Kg 3 05/11/23 12:12 05/16/2313:02 1 Naphthalene 8.6 J 35 2.3 ug/Kg 05/11/23 12:12 05/16/2313:02 1 Phenanthrene 22 J 35 7.7 ug/Kg o 05/11/23 12:12 05/16/2313:02 1 Pyrene 10 J 35 7.7 ug/Kg 05/11/23 12:12 05/16/2313:02 1 Anthracene ND 35 5.0 ug/Kg 05/11/23 12:12 05/16/2313:02 1 1-Methylnaphthalene 1.9 J 35 1.8 ug/Kg 05/11/23 12:12 05/16/2313:02 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 2-Fluorobiphenyl 71 42-104 05/11/23 12:12 05116123 13:02 1 Nitrobenzene-d5 74 14 -139 05/11/23 12:12 05116123 13:02 1 Terphenyl-d14 106 46-125 05/11/23 12:12 05116123 13:02 1 Client Sample ID: DU05-SU06-230505-COMP02 Lab Sample ID: 280-176200-4 Date Collected: 05/05/23 10:25 Matrix: Solid Date Received: 05/09/23 09:15 Percent Solids: 83.5 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 2-Methylnaphthalene 4.4 J 35 2.1 ug/Kg 05/11/23 12:12 05/16/2313:27 1 Acenaphthene ND 35 3.2 ug/Kg 05/11/23 12:12 05/16/2313:27 1 Acenaphthylene ND 35 2.7 ug/Kg 05/11/23 12:12 05/1612313:27 1 Benzo[a]anthracene ND 35 6.2 ug/Kg o 05/11/23 12:12 05/16/2313:27 1 Benzo[a]pyrene ND 35 5.1 ug/Kg o 05/11/23 12:12 05/16/2313:27 1 Benzo[b]fluoranthene 12 J 35 8.3 ug/Kg 05/11/23 12:12 05/16/2313:27 1 Benzo[g,hJ]perylene 40 35 7.6 ug/Kg o 05/11/23 12:12 05/16/2313:27 1 Benzo[k]fluoranthene ND 35 6.9 ug/Kg o 05/11/23 12:12 05/16/2313:27 1 Chrysene ND 35 6.9 ug/Kg 05/11/23 12:12 05/16/2313:27 1 Dibenz(a,h)anthracene ND 35 9.0 ug/Kg } 05/11/23 12:12 05/16/2313:27 1 Fluoranthene 24 J 35 6.9 ug/Kg 05/11/23 12:12 05/16/2313:27 1 Fluorene 3.9 J 35 3.2 ug/Kg 05/11/23 12:12 05/16/2313:27 1 Indeno[1,2,3-cd]pyrene 29 J 35 7.6 ug/Kg 05/11/23 12:12 05/16/2313:27 1 Naphthalene 9.9 J 35 2.3 ug/Kg o 05/11/23 12:12 05/16/2313:27 1 Phenanthrene 23 J 35 7.6 ug/Kg 05/11/23 12:12 05/1612313:27 1 Pyrene 9.6 J 35 7.6 ug/Kg D 05/11/23 12:12 05/16/2313:27 1 Anthracene ND 35 5.0 ug/Kg o 05/11/23 12:12 05/16/2313:27 1 1-Methylnaphthalene 2.4 J 35 1.8 ug/Kg o 05/11/23 12:12 05/16/2313:27 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 2-Fluorobiphenyl 69 42-164 05111123 12.12 05/16/23 13:27 1 Nitrobenzene-d5 76 14 -139 05111123 12:12 05/16/23 13:27 1 Eurofins Denver Page 31 of 160 6/1/2023 Client Sample Results Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon Method: SW846 8270D SIM - Semivolatile Organic Compounds (GC/MS SIM) (Continued) Client Sample ID: DU05-SU06-230505-COMP02 Lab Sample ID: 280-176200-4 Date Collected: 05/05/23 10:25 Matrix: Solid Date Received: 05/09/23 09:15 Percent Solids: 83.5 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac Terphenyl-d14 101 46-125 05/11/23 12:12 05116123 13:27 1 Client Sample ID: B03-19GW Lab Sample ID: 280-176200-5 Date Collected: 05/03/23 14:00 Matrix: Water Date Received: 05/09/23 09:15 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 2-Methylnaphthalene 0.030 J 0.10 0.022 ug/L 05/10/23 10:33 05/11/23 22:47 1 Acenaphthene 0.032 J 0.10 0.0043 ug/L 05/10/23 10:33 05/11/23 22:47 1 Acenaphthylene 0.017 J 0.10 0.0053 ug/L 05/10/23 10:33 05/11/23 22:47 1 Benzo[a]anthracene 0.098 J 0.10 0.029 ug/L 05/10/23 10:33 05/11/23 22:47 1 Benzo[a]pyrene 0.090 J 0.10 0.026 ug/L 05/10/23 10:33 05/11/23 22:47 1 Benzo[b]fluoranthene 0.10 0.10 0.041 ug/L 05/10/23 10:33 05/11/23 22:47 1 Benzo[g,h,i]perylene 0.10 0.10 0.038 ug/L 05/10/23 10:33 05/11/23 22:47 1 Benzo[k]fluoranthene 0.096 J 0.10 0.024 ug/L 05/10/23 10:33 05/11/23 22:47 1 Chrysene 0.10 0.10 0.034 ug/L 05/10/23 10:33 05/11/23 22:47 1 Dibenz(a,h)anthracene 0.094 J 0.10 0.029 ug/L 05/10/23 10:33 05/11/23 22:47 1 Fluoranthene 0.096 J 0.10 0.050 ug/L 05/10/23 10:33 05/11/23 22:47 1 Fluorene 0.034 J 0.10 0.020 ug/L 05/10/23 10:33 05/11/23 22:47 1 Indeno[1,2,3-cd]pyrene 0.097 J 0.10 0.041 ug/L 05/10/23 10:33 05/11/23 22:47 1 !, Naphthalene ND 0.10 0.024 ug/L 05/10/23 10:33 05/11/23 22:47 1 Phenanthrene 0.063 J 0.10 0.051 ug/L 05/10/23 10:33 05/11/23 22:47 1 Pyrene 0.096 J 0.10 0.047 ug/L 05/10/23 10:33 05/11/23 22:47 1 Anthracene 0.055 J 0.10 0.032 ug/L 05/10/23 10:33 05/11/23 22:47 1 1-Methylnaphthalene 0.027 J 0.10 0.019 ug/L 05/10/23 10:33 05/11/23 22:47 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 2-Fluorobiphenyl 60 26-114 05/10/23 10:33 05111123 22:47 1 Nitrobenzene-d5 57 18-126 05/10/23 10:33 05111123 22:47 1 Terphenyl-d14 76 36-131 05/10/23 10.33 05111123 22:47 1 Client Sample ID: B02-15GW Lab Sample ID: 280-176200-6 Date Collected: 05/03/23 15:00 Matrix: Water Date Received: 05/09/23 09:15 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 2-Methylnaphthalene 0.065 J 0.094 0.020 ug/L 05/10/23 10:33 05/11/23 23:12 1 Acenaphthene 0.081 J 0.094 0.0039 ug/L 05/10/23 10:33 05/11/23 23:12 1 Acenaphthylene ND 0.094 0.0048 ug/L 05/10/23 10:33 05/11/23 23:12 1 Benzo[a]anthracene ND 0.094 0.027 ug/L 05/10/23 10:33 05/11/23 23:12 1 Benzo[a]pyrene ND 0.094 0.023 ug/L 05/10/23 10:33 05/11/23 23:12 1 Benzo[b]fluoranthene ND 0.094 0.037 ug/L 05/10/23 10:33 05/11/23 23:12 1 Benzo[g,h,i]perylene ND 0.094 0.035 ug/L 05/10/23 10:33 05/11/23 23:12 1 Benzo[k]fluoranthene ND 0.094 0.021 ug/L 05/10/23 10:33 05111/2323:12 1 Chrysene ND 0.094 0.031 ug/L 05/10/23 10:33 05/11/23 23:12 1 Dibenz(a,h)anthracene ND 0.094 0.026 ug/L 05/10/23 10:33 05/11/23 23:12 1 Fluoranthene ND 0.094 0.046 ug/L 05/10/23 10:33 05/11/23 23:12 1 Fluorene 0.094 0.094 0.018 ug/L 05/10/23 10:33 05/11/23 23:12 1 Indeno[1,2,3-cd]pyrene ND 0.094 0.037 ug/L 05/10/23 10:33 05/11/23 23:12 1 Naphthalene 0.049 J 0.094 0.022 ug/L 05/10/23 10:33 05/11/23 23:12 1 Phenanthrene 0.049 J 0.094 0.046 ug/L 05/10/23 10:33 05/11/23 23:12 1 Pyrene ND 0.094 0.042 ug/L 05/10/23 10:33 05/11/23 23:12 1 Eurofins Denver Page 32 of 160 6/1/2023 Client Sample Results Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon - - -- ----- - --- - .. ....... -- - --- Method: SW846 8270D SIM - Semivolatile Organic Compounds (GC/MS SIM) (Continued) Client Sample ID: B02-15GW Lab Sample ID: 280-176200-6 Date Collected: 05/03/23 15:00 Matrix: Water Date Received: 05/09/23 09:15 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Anthracene ND 0.094 0.029 ug/L 05/10/23 10:33 05/11/23 23:12 1 1-Methylnaphthalene 0.058 J 0.094 0.017 ug/L 05/10/23 10:33 05/11/23 23:12 1 Surrogate %Recovery Qualffier Limits Prepared Analyzed Dil Fac 2-Fluorobiphenyl 57 26-114 05110123 10:33 05111123 23:12 1 Nitrobenzene-d5 57 18 -126 05110123 10.33 05111123 23:12 1 Terphen yl-d 14 69 36 -131 05110123 10:33 05111123 23:12 1 Client Sample ID: B03-17 Lab Sample ID: 280-176200-7 Date Collected: 05/03/23 13:15 Matrix: Solid Date Received: 05/09/23 09:15 Percent Solids: 86.0 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 2-Methylnaphthalene ND 34 2.1 ug/Kg a 05/15/2314:28 05/16/2311:49 1 Acenaphthene ND 34 3.1 ug/Kg o 05/15/2314:28 05/16/2311:49 1 Acenaphthylene ND 34 2.6 ug/Kg 05/15/2314:28 05/16/2311:49 1 Benzo[a]anthracene ND 34 6.0 ug/Kg 05/15/2314:28 05/16/2311:49 1 Benzo[a]pyrene ND 34 5.0 ug/Kg 05/15/2314:28 05/16/2311:49 1 Benzo[b]fluoranthene ND 34 8.0 ug/Kg 05/15/2314:28 05/16/2311:49 1 Benzo[g,h,i]perylene ND 34 7.4 ug/Kg 05/15/2314:28 05/16/2311:49 1 Benzo[k]fluoranthene ND 34 6.7 ug/Kg � 05/15/2314:28 05/16/2311:49 1 Chrysene ND 34 6.7 ug/Kg ff 05/15/2314:28 05/16/2311:49 1 Dibenz(a,h)anthracene ND 34 8.7 ug/Kg 05/15/2314:28 05/16/2311:49 1 Fluoranthene ND 34 6.7 ug/Kg 05/15/2314:28 05/16/2311:49 1 Fluorene ND 34 3.2 ug/Kg 05/15/2314:28 05/16/2311:49 1 Indeno[1,2,3-cd]pyrene ND 34 7.4 ug/Kg 05/15/2314:28 05/16/2311:49 1 Naphthalene 11 J 34 2.2 ug/Kg 05/15/2314:28 05/16/2311:49 1 Phenanthrene ND 34 7.4 ug/Kg <� 05/15/2314:28 05/16/2311:49 1 Pyrene ND 34 7.4 ug/Kg 05/15/2314:28 05/16/2311:49 1 Anthracene ND 34 4.8 ug/Kg 05/15/2314:28 05/16/2311:49 1 1-Methylnaphthalene ND 34 1.7 ug/Kg 05/15/2314:28 05/16/2311:49 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 2-Fluorobiphenyl 57 42-104 0511512314.28 0511612311:49 1 Nitrobenzene-d5 42 14 - 139 05/15/23 14:28 05/16/23 11:49 1 Terphenyl-d14 88 46-125 0511512314.28 0511612311:49 1 Client Sample ID: B02-8 Lab Sample ID: 280-176200-8 Date Collected: 05/03/23 13:30 Matrix: Solid Date Received: 05/09/23 09:15 Percent Solids: 88.3 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 2-Methylnaphthalene 4.4 J 33 2.1 ug/Kg } 05/15/2314:28 05/16/2312:11 1 Acenaphthene ND 33 3.1 ug/Kg 05/15/2314:28 05/16/2312:11 1 Acenaphthylene ND 33 2.6 ug/Kg 05/15/2314:28 05/16/2312:11 1 Benzo[a]anthracene ND 33 6.0 ug/Kg 05/15/2314:28 05/1612312:11 1 Benzo[a]pyrene 5.5 J 33 4.9 ug/Kg 05/15/2314:28 05/16/2312:11 1 Benzo[b]fluoranthene 9.6 J 33 8.0 ug/Kg 4a 05/15/2314:28 05/16/2312:11 1 Benzo[g,h,i]perylene ND 33 7.3 ug/Kg o 05/15/2314:28 05/16/2312:11 1 Benzo[k]fluoranthene ND 33 6.7 ug/Kg a 05/15/2314:28 05/16/2312:11 1 Chrysene 8.2 J 33 6.7 ug/Kg 05/15/2314:28 05/16/2312:11 1 Dibenz(a,h)anthracene ND 33 8.7 ug/Kg 05/15/2314:28 05/16/2312:11 1 Eurofins Denver Page 33 of 160 6/1/2023 Client Sample Results Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon Method: SW846 8270D SIM - Semivolatile Organic Compounds (GC/MS SIM) (Continued) Client Sample ID: B02-8 Lab Sample ID: 280-176200-8 Date Collected: 05/03/23 13:30 Matrix: Solid Date Received: 05/09/23 09:15 Percent Solids: 88.3 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Fluoranthene 7.3 J 33 6.7 ug/Kg <� 05/15/2314:28 05/16/2312:11 1 Fluorene ND 33 3.1 ug/Kg 3:� 05/15/2314:28 05/16/2312:11 1 Indeno[1,2,3-cd]pyrene ND 33 7.3 ug/Kg 05/15/2314:28 05/16/2312:11 1 Naphthalene 5.4 J 33 2.2 ug/Kg 05/15/2314:28 05/16/2312:11 1 Phenanthrene 11 J 33 7.3 ug/Kg 05/15/2314:28 05/16/2312:11 1 Pyrene ND 33 7.3 ug/Kg <� 05/15/2314:28 05/16/2312:11 1 Anthracene ND 33 4.8 ug/Kg 05/15/2314:28 05/16/2312:11 1 1-Methylnaphthalene 2.7 J 33 1.7 ug/Kg 05/15/2314:28 05/16/2312:11 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 2-Fluorobiphenyl 59 42-104 05115123 14:28 0511612312.11 1 Nitrobenzene-d5 40 14 -139 05/15/23 14:28 05/16/23 12:11 1 Terphenyl-d14 80 46-125 05115123 14:28 05116123 12:11 1 Client Sample ID: DU07-230502-Native Lab Sample ID: 280-176200-10 Date Collected: 05/02/23 18:30 Matrix: Solid Date Received: 05/09/23 09:15 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac j 2-Methyl naphthalene ND 10 0.62 ug/Kg 05/15/2314:28 05/16/2312:33 1 Acenaphthene ND 10 0.92 ug/Kg 05/15/2314:28 05/16/2312:33 1 Acenaphthylene ND 10 0.78 ug/Kg 05/15/2314:28 05/16/2312:33 1 Benzo[a]anthrace ne ND 10 1.8 ug/Kg 05/15/2314:28 05/16/2312:33 1 Benzo[a]pyrene ND 10 1.5 ug/Kg 05/15/2314:28 05/16/2312:33 1 Benzo[b]fluoranthene ND 10 2.4 ug/Kg 05/15/2314:28 05/16/2312:33 1 Benzo[g,h,i]perylene ND 10 2.2 ug/Kg 05/15/2314:28 05/16/2312:33 1 Benzo[k]fluoranthene ND 10 2.0 ug/Kg 05/15/2314:28 05/16/2312:33 1 Chrysene ND 10 2.0 ug/Kg 05/15/2314:28 05/16/2312:33 1 Dibenz(a,h)anthracene ND 10 2.6 ug/Kg 05/15/2314:28 05/16/2312:33 1 Fluoranthene ND 10 2.0 ug/Kg 05/15/2314:28 05/16/2312:33 1 Fluorene ND 10 0.94 ug/Kg 05/15/2314:28 05/16/2312:33 1 Indeno[1,2,3-cd]pyrene ND 10 2.2 ug/Kg 05/15/2314:28 05/16/2312:33 1 Naphthalene 1.1 J 10 0.65 ug/Kg 05/15/2314:28 05/16/2312:33 1 Phenanthrene ND 10 2.2 ug/Kg 05/15/2314:28 05/16/2312:33 1 Pyrene ND 10 2.2 ug/Kg 05/15/2314:28 05/16/2312:33 1 Anthracene ND 10 1.4 ug/Kg 05/15/2314:28 05/16/2312:33 1 1 -Methyl naphthalene ND 10 0.52 ug/Kg 05/15/2314:28 05/16/2312:33 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 2-Fluorobiphenyl 46 42-104 05115123 14:28 05116123 12:33 1 Nitrobenzene-d5 45 14 -139 05115123 14:28 05116123 12:33 1 Terphenyl-d14 55 46-125 05115123 14:28 05/16/23 12:33 1 r Client Sample ID: DU07-230502-Fill Lab Sample ID: 280-176200-11 Date Collected: 05/02/23 18:45 Matrix: Solid Date Received: 05/09/23 09:15 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 2-Methylnaphthalene 1.0 J 9.9 0.61 ug/Kg 05/15/2314:28 05/16/2312:56 1 Acenaphthene ND 9.9 0.92 ug/Kg 05/15/2314:28 05/16/2312:56 1 Acenaphthylene ND 9.9 0.77 ug/Kg 05/15/2314:28 05/16/2312:56 1 Benzo[a]anthrace ne 2.7 J 9.9 1.8 ug/Kg 05/15/2314:28 05/16/2312:56 1 Eurofins Denver Page 34 of 160 6/1/2023 Client Sample Results Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon Method: SW846 8270D SIM - Semivolatile Organic Compounds (GC/MS SIM) (Continued) Client Sample ID: DU07-230502-Fill Lab Sample ID: 280-176200-11 Date Collected: 05/02/23 18:45 Matrix: Solid Date Received: 05/09/23 09:15 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Benzo[a]pyrene 2.6 J 9.9 1.5 ug/Kg 05/15/2314:28 05/16/2312:56 1 Benzo[b]fluoranthene 4.7 J 9.9 2.4 ug/Kg 05/15/2314:28 05/16/2312:56 1 Benzo[g,h,i]perylene 2.5 J 9.9 2.2 ug/Kg 05/15/2314:28 05/16/2312:56 1 Benzo[k]fluoranthene ND 9.9 2.0 ug/Kg 05/15/2314:28 05/16/2312:56 1 Chrysene 4.0 J 9.9 2.0 ug/Kg 05/15/2314:28 05/16/2312:56 1 Dibenz(a,h)anthracene ND 9.9 2.6 ug/Kg 05/15/2314:28 05/1612312:56 1 Fluoranthene 4.5 J 9.9 2.0 ug/Kg 05/15/2314:28 05/16/2312:56 1 Fluorene ND 9.9 0.93 ug/Kg 05/15/2314:28 05/16/2312:56 1 Indeno[1,2,3-cd]pyrene ND 9.9 2.2 ug/Kg 05/15/2314:28 05/16/2312:56 1 Naphthalene 1.8 J 9.9 0.65 ug/Kg 05/15/2314:28 05/16/2312:56 1 Phenanthrene 3.4 J 9.9 2.2 ug/Kg 05/15/2314:28 05/16/2312:56 1 Pyrene 3.9 J 9.9 2.2 ug/Kg 05/15/2314:28 05/16/2312:56 1 Anthracene ND 9.9 1.4 ug/Kg 05/15/2314:28 05/16/2312:56 1 1-Methylnaphthalene 0.62 J 9.9 0.52 ug/Kg 05/15/2314:28 05/16/2312:56 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 2-Fluorobiphenyl 44 42-104 05115123 14:28 0511612312:56 1 Nitrobenzene-d5 43 14 -139 05115123 14:28 05/16/23 12.56 1 Terphenyl-d14 45 S1- 46-125 0511512314.28 0511612312:56 1 [Client Sample ID: DU04-SU01-230504-0.5 Lab Sample ID: 280-176200-13 Date Collected: 05/04/23 14:45 Matrix: Solid Date Received: 05/09/23 09:15 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 2-Methylnaphthalene 16 9.9 0.61 ug/Kg 05/15/2314:28 05/16/2313:18 1 Acenaphthene 6.6 J 9.9 0.91 ug/Kg 05/15/2314:28 05/16/2313:18 1 Acenaphthylene ND 9.9 0.76 ug/Kg 05/15/2314:28 05/16/2313:18 1 Benzo[a]anthracene 1.8 J 9.9 1.8 ug/Kg 05/15/2314:28 05/16/2313:18 1 Benzo[a]pyrene ND 9.9 1.5 ug/Kg 05/15/2314:28 05/16/2313:18 1 Benzo[b]fluoranthene ND 9.9 2.4 ug/Kg 05/15/2314:28 05/16/2313:18 1 Benzo[g,h,i]perylene ND 9.9 2.2 ug/Kg 05/15/2314:28 05/16/2313:18 1 Benzo[k]fluoranthene ND 9.9 2.0 ug/Kg 05/15/2314:28 05/16/2313:18 1 Chrysene 3.7 J 9.9 2.0 ug/Kg 05/15/2314:28 05/16/2313:18 1 Dibenz(a,h)anthracene ND 9.9 2.6 ug/Kg 05/15/2314:28 05/16/2313:18 1 Fluoranthene 14 9.9 2.0 ug/Kg 05/15/2314:28 05/1612313:18 1 Fluorene 4.5 J 9.9 0.93 ug/Kg 05/15/2314:28 05/16/2313:18 1 Indeno[1,2,3-cd]pyrene ND 9.9 2.2 ug/Kg 05/15/2314:28 05/16/2313:18 1 Naphthalene 10 9.9 0.64 ug/Kg 05/15/2314:28 05/16/2313:18 1 Phenanthrene 26 9.9 2.2 ug/Kg 05/15/2314:28 05/16/2313:18 1 Pyrene 8.9 J 9.9 2.2 ug/Kg 05/15/2314:28 05/16/2313:18 1 Anthracene ND 9.9 1.4 ug/Kg 05/15/2314:28 05/16/2313:18 1 1-Methylnaphthalene 7.9 J 9.9 0.51 ug/Kg 05/15/2314:28 05/16/2313:18 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 2-Fluorobiphenyl 58 42 -104 05115123 14:28 05116123 13:18 1 Nitrobenzene-d5 54 14 -139 05115123 14:28 05116123 13:18 1 Terphenyl-d14 67 46-125 05115123 14:28 05/16/23 13:18 1 Eurofins Denver Page 35 of 160 6/1/2023 Client Sample Results Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon -- - __ Method: SW846 8270D SIM - Semivolatile Organic Compounds (GC/MS SIM) Client Sample ID: DU06-SU03-230504-0.5 Lab Sample ID: 280-176200-14 Date Collected: 05/04/23 15:30 Matrix: Solid Date Received: 05/09/23 09:15 1 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 2-Methylnaphthalene 14 10 0.62 ug/Kg 05/15/23 14:28 05/16/2314:24 1 Acenaphthene 2.8 J 10 0.92 ug/Kg 05/15/23 14:28 05/16/2314:24 1 Acenaphthylene 3.3 J 10 0.78 ug/Kg 05/15/23 14:28 05/16/2314:24 1 Benzo[a]anthrace ne 8.5 J 10 1.8 ug/Kg 05/15/23 14:28 05/16/2314:24 1 Benzo[a]pyrene 8.4 J 10 1.5 ug/Kg 05/15/23 14:28 05/16/2314:24 1 Benzo[b]fluoranthene 15 10 2.4 ug/Kg 05/15/23 14:28 05/16/2314:24 1 Benzo[g,hJ]perylene 13 10 2.2 ug/Kg 05/15/23 14:28 05/16/2314:24 1 Benzo[k]fluoranthene 3.5 J 10 2.0 ug/Kg 05/15/23 14:28 05/16/2314:24 1 Chrysene 17 10 2.0 ug/Kg 05/15/23 14:28 05/16/2314:24 1 Dibenz(a,h)anthracene ND 10 2.6 ug/Kg 05/15/23 14:28 05/16/2314:24 1 Fluoranthene 17 10 2.0 ug/Kg 05/15/23 14:28 05/16/2314:24 1 Fluorene ND 10 0.94 ug/Kg 05/15/23 14:28 05/16/2314:24 1 Indeno[1,2,3-cd]pyrene 8.9 J 10 2.2 ug/Kg 05/15/23 14:28 05/16/2314:24 1 Naphthalene 8.0 J 10 0.65 ug/Kg 05/15/23 14:28 05/16/2314:24 1 Phenanthrene 20 10 2.2 ug/Kg 05/15/23 14:28 05/16/2314:24 1 Pyrene 24 10 2.2 ug/Kg 05/15/23 14:28 05/16/2314:24 1 Anthracene 8.0 J 10 1.4 ug/Kg 05/15/23 14:28 05/16/2314:24 1 1-Methylnaphthalene 6.6 J 10 0.52 ug/Kg 05/15/23 14:28 05/16/2314:24 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 2-Fluorobiphenyl 68 42- 104 05/15/23 14:28 05116123 14:24 1 N6obenzene-d5 64 14 -139 05/15/23 14:28 05/16/23 14:24 1 Terphenyl-d14 70 46-125 05/15/23 14:28 05116123 14:24 1 Client Sample ID: DU02-230504-0.5 Lab Sample ID: 280-176200-18 Date Collected: 05/04/23 17:00 Matrix: Solid Date Received: 05/09/23 09:15 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 2-Methyl naphthalene 1.9 J 10 0.62 ug/Kg 05/15/23 14:28 05/16/2314:46 1 Acenaphthene ND 10 0.92 ug/Kg 05/1512314:28 05/16/2314:46 1 Acenaphthylene 1.7 J 10 0.78 ug/Kg 05/15/23 14:28 05/16/2314:46 1 Benzo[a]anthrace ne ND 10 1.8 ug/Kg 05/15/23 14:28 05/16/2314:46 1 Benzo[a]pyrene 2.6 J 10 1.5 ug/Kg 05/15/23 14:28 05/16/2314:46 1 Benzo[b]fluoranthene 2.9 J 10 2.4 ug/Kg 05/15/23 14:28 05/16/2314:46 1 Benzo[g,h,i]perylene 2.7 J 10 2.2 ug/Kg 05/15/23 14:28 05/16/2314:46 1 Benzo[k]fluoranthene ND 10 2.0 ug/Kg 05/15/23 14:28 05/16/2314:46 1 Chrysene 3.2 J 10 2.0 ug/Kg 05/15/23 14:28 05/16/2314:46 1 Dibenz(a,h)anthracene ND 10 2.6 ug/Kg 05/15/23 14:28 05/16/2314:46 1 Fluorene ND 10 0.94 ug/Kg 05/15/23 14:28 05/16/2314:46 1 Indeno[1,2,3-cd]pyrene 2.2 J 10 2.2 ug/Kg 05/15/23 14:28 05/16/2314:46 1 Naphthalene 7.5 J 10 0.65 ug/Kg 05/15/23 14:28 05/16/2314:46 1 1 -Methyl naphthalene 1.3 J 10 0.52 ug/Kg 05115/2314:28 05/16/2314:46 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 2-Fluorobiphenyl 65 42-104 05115123 14:28 05116123 14:46 1 Nitrobenzene-d5 68 14 -139 05/15/23 14:28 05/16/23 14:46 1 Eurofins Denver Page 36 of 160 6/1/2023 Client Sample Results Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon Method: SW846 8270D - Semivolatile Organic Compounds (GC/MS) (Continued) Client Sample ID: DU01-230504-0.5 Lab Sample ID: 280-176200-15 Date Collected: 05/04/23 16:15 Matrix: Solid Date Received: 05/09/23 09:15 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 2,6-Dichlorophenol ND 336 22 ug/Kg 05/15/23 15:08 05/18/23 16:41 1 2,6-Dinitrotoluene ND 330 28 ug/Kg 05/15/23 15:08 05/18/23 16:41 1 Aniline ND F2 *- 330 130 ug/Kg 05/15/23 15:08 05/18/23 16:41 1 Azobenzene ND 330 22 ug/Kg 05/15/23 15:08 05/18/23 16:41 1 Benzaldehyde ND 330 67 ug/Kg 05/15/23 15:08 05/18/23 16:41 1 Benzidine ND F1 3300 990 ug/Kg 05/15/23 15:08 05/18/23 16:41 1 Caprolactam ND F1 330 110 ug/Kg 05/15/23 15:08 05/18/23 16:41 1 Diphenylamine ND 330 44 ug/Kg 05/15/23 15:08 05/18/23 16:41 1 N-Nitrosodimethylamine ND 330 37 ug/Kg 05/15/23 15:08 05/18/23 16:41 1 Pyridine ND *- 660 40 ug/Kg 05/15/23 15:08 05/18/23 16:41 1 Hexadecane ND 330 13 ug/Kg 05/15/23 15:08 05/18/23 16:41 1 1,2-Diphenylhydrazine(as ND 330 22 ug/Kg 05/15/23 15:08 05/18/23 16:41 1 Azobenzene) 3-Methylphenol ND 330 33 ug/Kg 05/15/23 15:08 05/18/23 16:41 1 4-Methylphenol ND 330 33 ug/Kg 05/15/23 15:08 05/18/23 16:41 1 Benzoic acid ND F2 F1 *- 1600 330 ug/Kg 05/15/23 15:08 05/18/23 16:41 1 Famphur ND F1 660 34 ug/Kg 05/15/23 15:08 05/18/23 16:41 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 2-Fluorobiphenyl 90 33-135 05/15/23 15:08 05/18/23 16:41 1 2-Fluorophenol (Surr) 86 39 - 135 05/15/23 15.08 05118123 16:41 1 2,4,6-Tribromophenol (Surr) 95 24-135 05115123 15:08 05118123 16:41 1 Nitrobenzene-d5 (Surr) 83 32 -135 05115123 15:08 05/18/23 16:41 1 Phenol-d5 (Surr) 91 39 -135 05115123 15:08 05118123 16:41 1 Terphenyl-d14 (Surr) 107 30-135 05/15/23 15:08 05118123 16:41 1 Client Sample ID: DU01-230504-0.5-Rep1 Lab Sample ID: 280-176200-16 Date Collected: 05/04/23 16:25 Matrix: Solid Date Received: 05/09/23 09:15 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 1,2,4-Trichlorobenzene ND 320 27 ug/Kg 05/15/23 15:08 05/18/2317:46 1 1,2-Dichlorobenzene ND 320 21 ug/Kg 05/15/23 15:08 05/18/2317:46 1 1,3-Dichlorobenzene ND 320 12 ug/Kg 05/1512315:08 05/18/2317:46 1 2,2'-oxybis[l-chloropropane] ND 320 22 ug/Kg 05/15/23 15:08 05/18/2317:46 1 2,4,5-Trichlorophenol ND 320 9.6 ug/Kg 05/15/23 15:08 05/18/2317:46 1 2,4,6-Trichlorophenol ND 320 9.6 ug/Kg 05/15/23 15:08 05/18/2317:46 1 2,4-Dimethylphenol ND 320 63 ug/Kg 05/15/23 15:08 05/18/2317:46 1 2,4-Dinitrotoluene ND 320 63 ug/Kg 05/15/23 15:08 05/18/2317:46 1 2,4-Dinitrophenol ND *+ 1500 320 ug/Kg 05/15/23 15:08 05/18/2317:46 1 2,4-Dichlorophenol ND 320 9.6 ug/Kg 05/15/23 15:08 05/18/2317:46 1 2-Chlorophenol ND 320 20 ug/Kg 05/15/23 15:08 05/18/2317:46 1 2-Chloronaphthalene ND 320 9.6 ug/Kg 05/15/23 15:08 05/18/2317:46 1 2-Nitrophenol ND 320 9.6 ug/Kg 05/15/23 15:08 05/18/2317:46 1 2-Methylphenol ND 320 13 ug/Kg 05/15/23 15:08 05/18/2317:46 1 2-Nitroaniline ND 1500 48 ug/Kg 05/15/23 15:08 05/18/2317:46 1 3-Nitroaniline ND 1500 70 ug/Kg 05/15/23 15:08 05/18/2317:46 1 4,6-Dinitro-2-methylphenol ND 1500 320 ug/Kg 05/15/23 15:08 05/18/2317:46 1 4-Bromophenyl phenyl ether ND 320 18 ug/Kg 05/15/23 15:08 05/18/23 17:46 1 4-Chloro-3-methylphenol ND *+ 320 24 ug/Kg 05/15/23 15:08 05/18/2317:46 1 4-Chloroaniline ND 320 79 ug/Kg 05/15/23 15:08 05/18/2317:46 1 Eurofins Denver Page 41 of 160 6/1/2023 Client Sample Results Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon Method: SW846 8270D - Semivolatile Organic Compounds (GC/MS) (Continued) Client Sample ID: DU01-230504-0.5-Rep1 Date Collected: 05/04/23 16:25 Date Received: 05/09/23 09:15 Analyte Result Qualifier 4-Chlorophenyl phenyl ether ND 4-Nitrophenol ND 4-Nitroaniline ND Acenaphthene ND Benzo[k]fluoranthene ND *+ Anthracene ND Acetophenone ND Acenaphthylene ND Benzo[a]anthracene 22 J *+ Benzo[b]fluoranthene 170 J *+ Benzo[g,h,i]perylene ND Benzo[a]pyrene 76 J Benzyl alcohol ND Bis(2-chloroethoxy)methane ND *+ Bis(2-chloroethyl)ether ND *+ Bis(2-ethylhexyl) phthalate ND *+ Butyl benzyl phthalate ND *+ Carbazole ND Chrysene ND Dibenz(a,h)anthracene ND *+ Di-n-butyl phthalate ND *+ Di-n-octyl phthalate ND Dibenzofuran ND Diethyl phthalate ND Dimethyl phthalate ND Fluoranthene ND Fluorene ND Hexachlorobenzene ND Hexachlorobutadiene ND Hexachlorocyclopentadiene ND *+ Hexachloroethane ND Indeno[1,2,3-cd]pyrene ND Isophorone ND N-Nitrosodi-n-propylamine ND N-Nitrosodiphenylamine ND *+ Pentachlorophenol ND Phenanthrene ND Phenol ND Pyrene 20 J 1,4-Dichlorobenzene ND Naphthalene ND 2-Methylnaphthalene ND Nitrobenzene ND 3,3'-Dichlorobenzidine ND 3 & 4 Methylphenol ND 1,1'-Biphenyl ND 1,2,4,5-Tetrachlorobenzene ND 1,3-Dinitrobenzene ND 1 -Methyl naphthalene ND Lab Sample ID: 280-176200-16 Matrix: Solid RL MDL Unit D Prepared Analyzed Dil Fac 320 20 ug/Kg 05/15/2315:08 05/18/2317:46 1 1500 93 ug/Kg 05/15/2315:08 05/18/2317:46 1 1500 70 ug/Kg 05/15/2315:08 05/18/2317:46 1 320 9.9 ug/Kg 05/15/2315:08 05/18/2317:46 1 320 38 ug/Kg 05/15/2315:08 05/18/2317:46 1 320 16 ug/Kg 05/15/2315:08 05/18/2317:46 1 320 19 ug/Kg 05/15/2315:08 05/18/2317:46 1 320 79 ug/Kg 05/15/2315:08 05/18/2317:46 1 320 19 ug/Kg 05/15/2315:08 05/18/2317:46 1 320 25 ug/Kg 05/15/2315:08 05/18/2317:46 1 320 15 ug/Kg 05/15/2315:08 05/18/2317:46 1 320 19 ug/Kg 05/15/2315:08 05/18/2317:46 1 320 9.6 ug/Kg 05/15/2315:08 05/18/2317:46 1 320 22 ug/Kg 05/15/2315:08 05/18/2317:46 1 320 16 ug/Kg 05/1512315:08 05/18/2317:46 1 320 44 ug/Kg 05/15/2315:08 05/18/2317:46 1 320 41 ug/Kg 05/15/2315:08 05/18/2317:46 1 320 35 ug/Kg 05/15/2315:08 05/18/2317:46 1 320 26 ug/Kg 05/15/2315:08 05/18/2317:46 1 320 18 ug/Kg 05/15/2315:08 05/18/2317:46 1 320 28 ug/Kg 05/15/2315:08 05/18/2317:46 1 320 39 ug/Kg 05/15/2315:08 05/18/2317:46 1 320 19 ug/Kg 05/1512315:08 05/18/2317:46 1 630 25 ug/Kg 05/15/2315:08 05/18/2317:46 1 320 22 ug/Kg 05/15/2315:08 05/18/2317:46 1 320 35 ug/Kg 05/15/2315:08 05118/2317:46 1 320 17 ug/Kg 05/15/2315:08 05/18/2317:46 1 320 28 ug/Kg 05/1512315:08 05/18/2317:46 1 320 9.6 ug/Kg 05/15/2315:08 05/18/2317:46 1 1500 110 ug/Kg 05/15/2315:08 05/18/2317:46 1 320 20 ug/Kg 05/15/2315:08 05/18/2317:46 1 320 21 ug/Kg 05/15/2315:08 05/18/2317:46 1 320 16 ug/Kg 05/15/2315:08 05/18/2317:46 1 320 65 ug/Kg 05/15/2315:08 05/18/2317:46 1 320 20 ug/Kg 05/15/2315:08 05/18/2317:46 1 1500 320 ug/Kg 05/15/2315:08 05/18/2317:46 1 320 16 ug/Kg 05/15/2315:08 05/18/2317:46 1 320 17 ug/Kg 05/15/2315:08 05/18/2317:46 1 320 12 ug/Kg 05/15/2315:08 05/18/2317:46 1 320 13 ug/Kg 05/15/2315:08 05/18/2317:46 1 320 30 ug/Kg 05/15/2315:08 05/18/2317:46 1 320 18 ug/Kg 05/15/2315:08 05/18/2317:46 1 320 21 ug/Kg 05/15/2315:08 05/18/2317:46 1 630 87 ug/Kg 05/15/2315:08 05/18/2317:46 1 320 32 ug/Kg 05/15/2315:08 05/18/2317:46 1 320 23 ug/Kg 05/15/2315:08 05/18/2317:46 1 320 47 ug/Kg 05/15/2315:08 05/18/2317:46 1 320 68 ug/Kg 05/15/2315:08 05/18/2317:46 1 320 11 ug/Kg 05/15/2315:08 05/18/2317:46 1 Eurofins Denver Page 42 of 160 6/ 1 /2023 Client Sample Results Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon Method: SW846 8270D - Semivolatile Organic Compounds (GC/MS) (Continued) Client Sample ID: DU01-230504-0.5-Repl Lab Sample ID: 280-176200-16 Date Collected: 05/04/23 16:25 Matrix: Solid Date Received: 05/09/23 09:15 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 2,3,4,6-Tetrachlorophenol ND 1500 130 ug/Kg 05/15/23 15:08 05/18/2317:46 1 2,6-Dichlorophenol ND 320 22 ug/Kg 05/15/23 15:08 05/18/2317:46 1 2,6-Dinitrotoluene ND 320 27 ug/Kg 05/15/23 15:08 05/18/2317:46 1 Aniline ND *- 320 130 ug/Kg 05/15/23 15:08 05/18/2317:46 1 Azobenzene ND 320 21 ug/Kg 05/15/23 15:08 05/18/2317:46 1 Benzaldehyde ND 320 64 ug/Kg 05/15/23 15:08 05/18/2317:46 1 Benzidine ND 3200 950 ug/Kg 05/15/23 15:08 05/18/2317:46 1 Caprolactam ND 320 100 ug/Kg 05/15/23 15:08 05/18/2317:46 1 Diphenylamine ND 320 42 ug/Kg 05/15/23 15:08 05/18/2317:46 1 N-Nitrosodimethylamine ND 320 36 ug/Kg 05/15/23 15:08 05/18/2317:46 1 Pyridine ND *- 630 38 ug/Kg 05/15/23 15:08 05/18/2317:46 1 Hexadecane ND 320 13 ug/Kg 05/15/23 15:08 05/18/2317:46 1 1,2-Diphenylhydrazine(as ND 320 21 ug/Kg 05/15/23 15:08 05/18/2317:46 1 Azobenzene) 3-Methylphenol ND 320 32 ug/Kg 05/15/23 15:08 05/18/2317:46 1 4-Methylphenol ND 320 32 ug/Kg 05/15/23 15:08 05/18/2317:46 1 Benzoic acid ND *- 1500 320 ug/Kg 05/15/23 15:08 05/18/23 17:46 1 Famphur ND 630 33 ug/Kg 05/15/23 15:08 05/18/2317:46 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 2-Fluorobiphenyl 95 33-135 05/15/23 15:08 0511812317.46 1 2-Fluorophenol (Surr) 91 39 -135 05115123 15:08 05/18/23 17:46 1 2, 4, 6-Tribromophenol (Surr) 93 24 -135 05/15/23 15:08 05/18/23 17:46 1 Nitrobenzene-d5 (Surr) 90 32-135 05/15/23 15.08 05/18/23 17.46 1 Phenol-d5 (Surr) 98 39-135 05/15/23 15:08 05118123 17:46 1 Terphenyl-d14 (Surr) 112 30-135 05/15/23 15.08 05/18/23 17:46 1 Client Sample ID: DU01-230504-0.5-Rep2 Date Collected: 05/04/23 16:35 Date Received: 05/09/23 09:15 Analyte Result Qualifier 1,2,4-Trichlorobenzene ND 1,2-Dichlorobenzene ND 1,3-Dichlorobenzene ND 2,2'-oxybis[l-chloropropanel ND 2,4,5-Trichlorophenol ND 2,4,6-Trichlorophenol ND 2,4-Dimethylphenol ND 2,4-Dinitrotoluene ND 2,4-Dinitrophenol ND *+ 2,4-Dichlorophenol ND 2-Chlorophenol ND 2-Chloronaphthalene ND 2-Nitrophenol ND 2-Methylphenol ND 2-Nitroaniline ND 3-Nitroaniline ND 4,6- Din itro-2-methylphenol ND 4-Bromophenyl phenyl ether ND 4-Chloro-3-methylphenol ND *+ Lab Sample ID: 280-176200-17 Matrix: Solid RL MDL Unit D Prepared Analyzed Dil Fac 330 28 ug/Kg 05/15/23 15:08 05/18/2318:07 1 330 22 ug/Kg 05/16/2315:08 05/18/2318:07 1 330 12 ug/Kg 05/15/23 15:08 05/18/2318:07 1 330 23 ug/Kg 05/15/23 15:08 05/18/2318:07 1 330 10 ug/Kg 05/15/23 15:08 05/18/2318:07 1 330 10 ug/Kg 05/15/23 15:08 05/18/2318:07 1 330 66 ug/Kg 05/15/23 15:08 05/18/2318:07 1 330 66 ug/Kg 05/15/23 15:08 05/18/2318:07 1 1600 330 ug/Kg 05/15/23 15:08 05/18/2318:07 1 330 10 ug/Kg 05/15/23 15:08 05/18/2318:07 1 330 21 ug/Kg 05/15/23 15:08 05/18/2318:07 1 330 10 ug/Kg 05/15/2315:08 05/18/2318:07 1 330 10 ug/Kg 05/15/23 15:08 05/18/2318:07 1 330 13 ug/Kg 05/15/23 15:08 05/18/2318:07 1 1600 50 ug/Kg 05/15/23 15:08 05/18/2318:07 1 1600 73 ug/Kg 05/15/23 15:08 05/18/2318:07 1 1600 330 ug/K9 05/15/23 15:08 05/18/2318:07 1 330 19 ug/Kg 05/15/23 15:08 05/18/2318:07 1 330 25 ug/Kg 05/15/23 15:08 05/18/2318:07 1 Eurofins Denver Page 43 of 160 6/ 1 /2023 Client Sample Results Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Method: SW846 8270D - Semivolatile Organic Compounds (GC/MS) (Continued Client Sample ID: DU01-230504-0.5-Rep2 Date Collected: 05/04/23 16:35 Date Received: 05/09/23 09:15 Analyte Result Qualifier 4-Chloroaniline ND 4-Chlorophenyl phenyl ether ND 4-Nitrophenol ND 4-Nitroaniline ND Acenaphthene ND Benzo[k]fluoranthene ND *+ Anthracene ND Acetophenone ND Acenaphthylene ND Benzo[a]anthracene 32 J *+ Benzo[b]fluoranthene 200 J *+ j Benzo[g,h,i]perylene ND Benzo[a]pyrene 87 J Benzyl alcohol ND Bis(2-chloroethoxy)methane ND *+ Bis(2-chloroethyl)ether ND *+ Bis(2-ethylhexyl) phthalate ND *+ Butyl benzyl phthalate ND *+ Carbazole ND Chrysene 32 J Dibenz(a,h)anth race ne ND *+ Di-n-butyl phthalate ND *+ Di-n-octyl phthalate ND Dibenzofuran ND Diethyl phthalate ND Dimethyl phthalate ND Fluoranthene ND Fluorene ND Hexachlorobenzene ND Hexachlorobutadiene ND Hexachlorocyclopentadiene ND *+ Hexachloroethane ND Indeno[1,2,3-cd]pyrene ND Isophorone ND N-Nitrosodi-n-propylamine ND N-Nitrosodiphenylamine ND *+ Pentachlorophenol ND Phenanthrene ND Phenol ND Pyrene 25 J 1,4-Dichlorobenzene ND Naphthalene ND 2-Methylnaphthalene ND Nitrobenzene ND 3,3'-Dichlorobenzidine ND *- 3 & 4 Methylphenol ND 1,1'-Biphenyl ND 1,2,4,5-Tetrachlorobenzene ND 1,3-Dinitrobenzene ND Job ID: 280-176200-1 Lab Sample ID: 280-176200-17 Matrix: Solid RL MDL Unit D Prepared Analyzed Dil Fac 330 82 ug/Kg 05115/2315:08 05/18/2318:07 1 330 21 ug/Kg 05/15/2315:08 05/18/2318:07 1 1600 97 ug/Kg 05/15/2315:08 05/18/2318:07 1 1600 73 ug/Kg 05/15/2315:08 05/18/2318:07 1 330 10 ug/Kg 05/15/2315:08 05/18/2318:07 1 330 40 ug/Kg 05/15/2315:08 05/18/2318:07 1 330 17 ug/Kg 05/15/2315:08 05/18/2318:07 1 330 20 ug/Kg 05/15/2315:08 05/18/2318:07 1 330 82 ug/Kg 05/15/2315:08 05/18/2318:07 1 330 20 ug/Kg 05/15/2315:08 05/18/2318:07 1 330 26 ug/Kg 05/15/2315:08 05/18/2318:07 1 330 16 ug/Kg 05/15/2315:08 05/18/2318:07 1 330 20 ug/Kg 05/15/2315:08 05/18/2318:07 1 330 10 ug/Kg 05/15/2315:08 05/18/2318:07 1 330 23 ug/Kg 05/15/2315:08 05/18/2318:07 1 330 17 ug/Kg 05/15/2315:08 05/18/2318:07 1 330 46 ug/Kg 05/15/2315:08 05/18/2318:07 1 330 43 ug/Kg 05/15/2315:08 05/18/2318:07 1 330 36 ug/Kg 05/15/2315:08 05/18/2318:07 1 330 27 ug/Kg 05/15/2315:08 05/18/2318:07 1 330 19 ug/Kg 05/15/2315:08 05/18/2318:07 1 330 29 ug/Kg 05/15/2315:08 05/18/2318:07 1 330 41 ug/Kg 05/15/2315:08 05/18/2318:07 1 330 20 ug/Kg 05/15/2315:08 05/18/2318:07 1 660 26 ug/Kg 05/15/2315:08 05/18/2318:07 1 330 23 ug/Kg 05/15/2315:08 05/18/2318:07 1 330 36 ug/Kg 05/15/2315:08 05/18/2318:07 1 330 18 ug/Kg 05/15/2315:08 05/18/2318:07 1 330 29 ug/Kg 05/15/2315:08 05/18/2318:07 1 330 10 ug/Kg 05/15/2315:08 05/18/2318:07 1 1600 110 ug/Kg 05/15/2315:08 05/18/2318:07 1 330 21 ug/Kg 05/15/2315:08 05/18/2318:07 1 330 22 ug/Kg 05/15/2315:08 05/18/2318:07 1 330 17 ug/Kg 05/15/2315:08 05/18/2318:07 1 330 68 ug/Kg 05/15/2315:08 05/18/2318:07 1 330 21 ug/Kg 05/15/2315:08 05/18/2318:07 1 1600 330 ug/Kg 05/15/2315:08 05/18/2318:07 1 330 17 ug/Kg 05/15/2315:08 05/18/2318:07 1 330 18 ug/Kg 05/1512315:08 05/18/2318:07 1 330 12 ug/Kg 05/15/2315:08 05/18/2318:07 1 330 14 ug/Kg 05/15/2315:08 05/18/2318:07 1 330 31 ug/Kg 05/15/2315:08 05/18/2318:07 1 330 19 ug/Kg 05/15/2315:08 05/18/2318:07 1 330 22 ug/Kg 05/15/2315:08 05/18/2318:07 1 660 90 ug/Kg 05/15/2315:08 05/18/2318:07 1 330 33 ug/Kg 05/15/2315:08 05/18/2318:07 1 330 24 ug/Kg 05/15/2315:08 05/18/2318:07 1 330 49 ug/Kg 05/15/2315:08 05/1812318:07 1 330 71 ug/Kg 05/15/2315:08 05/18/2318:07 1 Eurofins Denver Page 44 of 160 6/1 /2023 Client Sample Results Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon ---- - - - - - .... ............. Method: SW846 8270D - Semivolatile Organic Compounds (GC/MS) (Continued) Client Sample ID: DU01-230504-0.5-Rep2 Date Collected: 05/04/23 16:35 Date Received: 05/09/23 09:15 Analyte Result Qualifier 1-Methylnaphthalene ND 2,3,4,6-Tetrachlorophenol ND 2,6-Dichlorophenol ND 2,6-Dinitrotoluene ND Aniline ND "- Azobenzene ND Benzaldehyde ND Benzidine ND Caprolactam ND Diphenylamine ND N-Nitrosodimethylamine ND Pyridine ND *- Hexadecane ND 1,2-Diphenylhydrazine(as ND Azobenzene) 3-Methylphenol ND 4-Methylphenol ND Benzoic acid ND '- Famphur ND Lab Sample ID: 280-176200-17 Matrix: Solid RL MDL Unit D Prepared Analyzed Dil Fac 330 11 ug/Kg 05/15/23 15:08 05/18/2318:07 1 1600 140 ug/Kg 05/15/23 15:08 05/18/2318:07 1 330 22 ug/Kg 05/15/23 15:08 05/18/2318:07 1 330 28 ug/Kg 05/15/23 15:08 05/18/2318:07 1 330 130 ug/Kg 05/15/23 15:08 05/18/2318:07 1 330 22 ug/Kg 05/15/23 15:08 05/18/2318:07 1 330 67 ug/Kg 05/15/23 15:08 05/18/2318:07 1 3300 990 ug/Kg 05/15/23 15:08 05/18/2318:07 1 330 110 ug/Kg 05/15/23 15:08 05/18/2318:07 1 330 44 ug/Kg 05/15/23 15:08 05/18/2318:07 1 330 37 ug/Kg 05/15/23 15:08 05/18/2318:07 1 660 40 ug/Kg 05/15/23 15:08 05/18/2318:07 1 330 13 ug/Kg 05/15/23 15:08 05/18/2318:07 1 330 22 ug/Kg 05/15/23 15:08 05/18/2318:07 1 330 33 ug/Kg 05/15/23 15:08 05/18/2318:07 1 330 33 ug/Kg 05/15/23 15:08 05/18/2318:07 1 1600 330 ug/Kg 05/15/23 15:08 05/18/2318:07 1 660 34 ug/Kg 05/15/23 15:08 05/18/2318:07 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 2-Fluorobiphenyl 101 33-135 05/15/23 15:08 05/18/2318:07 1 2-Fluorophenol (Surr) 94 39-135 05/15/23 15:08 05/18/23 18:07 1 2,4, 6-Tribromophenol (Surr) 100 24 -135 05/15/23 15:08 05118123 18:07 1 Nitrobenzene-d5 (Surr) 92 32-135 05115123 15:08 05/18/23 18:07 1 Phenol-d5 (Surr) 105 39-135 05/15/23 15:08 05118123 18:07 1 (Surr) 112 30-135 05115123 15:08 05118123 18:07 1 LTerphenyl-d14 Method: SW846 8082A - Polychlorinated Biphenyls (PCBs) by Gas Chromatography Client Sample ID: DU05-SU06-230505-COMP01 Lab Sample ID: 280-176200-3 Date Collected: 05/05/23 10:20 Matrix: Solid Date Received: 05/09/23 09:15 Percent Solids: 82.7 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac PCB-1221 ND 340 110 ug/Kg a 05/15/23 14:22 05/17/2318:47 1 PCB-1016 ND 240 75 ug/Kg a 05/15/23 14:22 05/17/2318:47 1 PCB-1232 ND 240 37 ug/Kg 05/15/23 14:22 05/17/2318:47 1 PCB-1242 ND 240 66 ug/Kg 05/15/23 14:22 05/17/2318:47 1 PCB-1248 ND 240 58 ug/Kg z 05/15/23 14:22 05/17/2318:47 1 PCB-1254 ND 240 40 ug/Kg 05/15/23 14:22 05/17/2318:47 1 PCB-1260 ND 240 61 ug/Kg 05/15/23 14:22 05/17/2318:47 1 PCB-1262 ND 240 20 ug/Kg 3�i 05/15/23 14:22 05/17/2318:47 1 PCB-1268 ND 240 74 ug/Kg o 05/15/23 14:22 05/17/2318:47 1 Polychlorinated biphenyls, Total ND 240 8.4 ug/Kg o 05/15/23 14:22 05/17/23 18:47 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac Tetrachloro-m-xylene 111 53-128 05115123 14:22 05/17/23 18:47 1 DCB Decachlorobiphenyl 87 59 - 130 05115123 14:22 05117123 18:47 1 Eurofins Denver Page 45 of 160 6/1/2023 Client Sample Results Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon Method: SW846 8082A - Polychlorinated Biphenyls (PCBs) by Gas Chromatography Client Sample ID: DU05-SU06-230505-COMP02 Lab Sample ID: 280-176200-4 Date Collected: 05/05/23 10:25 Matrix: Solid Date Received: 05/09/23 09:15 Percent Solids: 83.5 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac PCB-1221 ND 340 110 ug/Kg c� 05/15/23 14:22 05/17/23 19:06 1 PCB-1016 ND 240 74 ug/Kg r> 05/15/23 14:22 05/17/23 19:06 1 PCB-1232 ND 240 37 ug/Kg 05/15/23 14:22 05/17/23 19:06 1 PCB-1242 ND 240 65 ug/Kg 05/15/23 14:22 05/17/23 19:06 1 PCB-1248 ND 240 57 ug/Kg 05/15/23 14:22 05/17/23 19:06 1 PCB-1254 ND 240 40 ug/Kg a 05/15/23 14:22 05/17/23 19:06 1 PCB-1260 ND 240 61 ug/Kg 05/15/23 14:22 05/17/23 19:06 1 PCB-1262 ND 240 20 ug/Kg 05/15/23 14:22 05/17/23 19:06 1 PCB-1268 ND 240 74 ug/Kg 05/15/23 14:22 05/17/23 19:06 1 Polychlorinated biphenyls, Total ND 240 8.4 ug/Kg c 05/15/23 14:22 05/17/23 19:06 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac Tetrachloro-m-xylene 110 53- 128 05115123 14:22 05/17/23 19:06 1 DCB Decachlorobiphenyl 85 59 - 130 05/15/23 14:22 05/17/23 19:06 1 Client Sample ID: DU07-230502-Native Lab Sample ID: 280-176200-10 Date Collected: 05/02/23 18:30 Matrix: Solid Date Received: 05/09/23 09:15 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac PCB-1221 ND 92 31 ug/Kg 05/15/23 14:22 05/17/23 19:24 1 PCB-1016 ND 65 20 ug/Kg 05/15/23 14:22 05/17/23 19:24 1 PCB-1232 ND 65 10 ug/Kg 05/15/23 14:22 05/17/23 19:24 1 PCB-1242 ND 65 18 ug/Kg 05/15/23 14:22 05/17/23 19:24 1 PCB-1248 ND 65 16 ug/Kg 05/15/23 14:22 05/17/23 19:24 1 PCB-1254 ND 65 11 ug/Kg 05/1512314:22 05/17/23 19:24 1 PCB-1260 ND 65 17 ug/Kg 05/15/23 14:22 05/17/23 19:24 1 PCB-1262 ND 65 5.4 ug/Kg 05/15/23 14:22 05/17/23 19:24 1 PCB-1268 ND 65 20 ug/Kg 05/15/23 14:22 05/17/23 19:24 1 Polychlorinated biphenyls, Total ND 65 2.3 ug/Kg 05/15/23 14:22 05/17/23 19:24 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac Tetrachloro-m-xylene 91 53-128 0511512314:22 0511712319:24 1 DCB Decachlorobiphenyl 101 59- 130 05/15/23 14:22 05117123 19:24 1 Client Sample ID: DU07-230502-Fill Date Collected: 05/02/23 18:45 Date Received: 05/09/23 09:15 Analyte PCB-1221 PCB-1016 PCB-1232 PCB-1242 PCB-1248 PCB-1254 PCB-1260 PCB-1262 PCB-1268 Polychlorinated biphenyls, Total Lab Sample ID: 280-176200-11 Matrix: Solid Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac ND 87 29 ug/Kg 05/15/23 14:22 05/17/2319:43 1 ND 61 19 ug/Kg 05/15/23 14:22 05/17/2319:43 1 ND 61 9.4 ug/Kg 05/15/23 14:22 05/17/2319:43 1 ND 61 17 ug/Kg 05/15/23 14:22 05/17/2319:43 1 ND 61 15 ug/Kg 05/15/23 14:22 05/17/2319:43 1 ND 61 10 ug/Kg 05115/2314:22 05/17/2319:43 1 ND 61 16 ug/Kg 05/15/23 14:22 05/17/2319:43 1 ND 61 5.0 ug/Kg 05/15/23 14:22 05/17/2319:43 1 ND 61 19 ug/Kg 05/15/23 14:22 05/17/2319:43 1 ND 61 2.1 ug/Kg 05/15/23 14:22 05/17/2319:43 1 Surrogate %Recovery Qualifier Limits Tetrachloro-m-xylene 97 53-128 Prepared Analyzed Dil Fac 05/15/23 14:22 0511712319.43 1 Eurofins Denver Page 46 of 160 6/1/2023 Client Sample Results Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Method: NWTPH-Dx - Northwest - Semi -Volatile Petroleum Products (GC) Client Sample ID: DU05-SU06-230505-COMP01 Date Collected: 05/05/23 10:20 Date Received: 05/09/23 09:15 Analyte Result Qualifier RL MDL Unit D #2 Diesel (C10-C24) 22 J 61 15 mg/Kg Motor Oil (>C24-C36) 310 61 21 mg/Kg Surrogate %Recovery Qualifier Limits o-Terphenyl 70 50- 150 Client Sample ID: DU05-SU06-230505-COMP02 Date Collected: 05/05/23 10:25 Date Received: 05/09/23 09:15 Analyte Result Qualifier RL MDL Unit D #2 Diesel (C10-C24) 18 J 56 14 mg/Kg Motor Oil (>C24-C36) 240 56 19 mg/Kg Surrogate %Recovery Qualifier Limits o-Terphenyl 70 50- 150 Client Sample ID: B03-19GW Date Collected: 05/03/23 14:00 Date Received: 05/09/23 09:15 Job ID: 280-176200-1 Lab Sample ID: 280-176200-3 Matrix: Solid Percent Solids: 82.7 Prepared Analyzed oil Fac 05/12/23 13:28 05/15/2317:57 1 05/12/23 13:28 05/15/2317:57 1 Prepared Analyzed Dil Fac 0511212313:28 05/15/2317:57 1 Lab Sample ID: 280-176200-4 Matrix: Solid Percent Solids: 83.5 Prepared Analyzed oil Fac 05/12/23 13:28 05/15/2318:37 1 05/12/23 13:28 05/15/2318:37 1 Prepared Analyzed Dil Fac 0511212313:28 0511512318:37 1 Lab Sample ID: 280-176200-5 Matrix: Water Analyte Result Qualifier RL MDL Unit D Prepared Analyzed oil Fac #2 Diesel (C10-C24) 0.25 0.11 0.066 mg/L 05/11/23 09:43 05/11/23 21:36 1 Motor Oil (>C24-C36) 0.72 0.36 0.098 mg/L 05/11/23 09:43 05/11/23 21:30 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac o-Terphenyl 66 50 - 150 05111123 09:43 05111123 21:30 1 Client Sample ID: B02-15GW Lab Sample ID: 280-176200-6 Date Collected: 05/03/23 15:00 Matrix: Water Date Received: 05/09/23 09:15 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed oil Fac #2 Diesel (C10-C24) 2.3 0.11 0.065 mg/L 05/11/23 09:43 05/11/23 21:11 1 Motor Oil (>C24-C36) 4.2 0.35 0.096 mg/L 05/11/23 09:43 05/11/23 21:11 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac o-Terphenyl 67 50 -150 05111123 09:43 05111123 21:11 1 Client Sample ID: B03-17 Lab Sample ID: 280-176200-7 Date Collected: 05/03/23 13:15 Matrix: Solid Date Received: 05/09/23 09:15 Percent Solids: 86.0 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed oil Fac #2 Diesel (C10-C24) ND 58 14 mg/Kg 05/12/23 13:28 05/15/23 18:57 1 Motor Oil (>C24-C36) 28 J 58 20 mg/Kg 05/12/23 13:28 05/15/23 18:57 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac o-Terphenyl 72 50-150 05/12/23 13:28 05/15/2318:57 1 Client Sample ID: B02-8 Lab Sample ID: 280-176200-8 Date Collected: 05/03/23 13:30 Matrix: Solid Date Received: 05/09/23 09:15 Percent Solids: 88.3 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed oil Fac #2 Diesel (C10-C24) 66 56 14 mg/Kg o 05/12/23 13:28 05/15/23 19:16 1 Motor Oil (>C24-C36) 190 56 20 mg/Kg n 05/12/23 13:28 05/15/23 19:16 1 Eurofins Denver Page 49 of 160 6/1/2023 Client Sample Results Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon Method: NWTPH-Dx - Northwest - Semi -Volatile Petroleum Products (GC) (Continued) LSurrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac o-Terphenyl 73 50-150 05/12/2313:28 0511512319:16 1 Client Sample ID: DU07-230502-Native Lab Sample ID: 280-176200-10 Date Collected: 05/02/23 18:30 Matrix: Solid Date Received: 05/09/23 09:15 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac #2 Diesel (C10-C24) ND H 49 12 mg/Kg 05/18/23 14:28 05/30/23 13:27 1 Motor Oil (>C24-C36) ND H 49 17 mg/Kg 05/18/23 14:28 05/30/23 13:27 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac o-Terphenyl 61 50- 150 05118123 14:28 05/30/23 13:27 1 Client Sample ID: DU07-230502-Fill Lab Sample ID: 280-176200-11 Date Collected: 05/02/23 18:45 Matrix: Solid Date Received: 05/09/23 09:15 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac #2 Diesel (C10-C24) ND H 48 12 mg/Kg 05/18/23 14:28 05/30/23 14:05 1 Motor Oil (>C24-C36) 41 J H 48 17 mg/Kg 05/18/23 14:28 05/30/23 14:05 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac o-Terphenyl 64 50-150 0511812314:28 0513012314:05 1 Client Sample ID: DU04-SU01-230504-0.5 Lab Sample ID: 280-176200-13 Date Collected: 05/04/23 14:45 Matrix: Solid Date Received: 05/09/23 09:15 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac #2 Diesel (C10-C24) 56 49 12 mg/Kg 05/18/23 14:28 05/30/23 14:24 1 Motor Oil (>C24-C36) 350 49 17 mg/Kg 05/18/23 14:28 05/30/23 14:24 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac o-Terphenyl 63 50-150 0&18/23 14:28 05130123 14:24 1 Client Sample ID: DU06-SU03-230504-0.5 Lab Sample ID: 280-176200-14 Date Collected: 05/04/23 15:30 Matrix: Solid Date Received: 05/09/23 09:15 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac #2 Diesel (C10-C24) 280 47 12 mg/Kg 05/18/23 14:28 05/30/23 14:43 1 Motor Oil (>C24-C36) 2200 47 16 mg/Kg 05/18/23 14:28 05/30/23 14:43 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac o-Terphenyl 75 50-150 0511812314:28 0513012314:43 1 Client Sample ID: DU01-230504-0.5 Lab Sample ID: 280-176200-15 Date Collected: 05/04/23 16:15 Matrix: Solid Date Received: 05/09/23 09:15 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac #2 Diesel (C10-C24) 15 J 49 12 mg/Kg 05/18/23 14:28 05/30/23 15:02 1 Motor Oil (>C24-C36) 180 49 17 mg/Kg 05/18/23 14:28 05/30/23 15:02 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac o-Terphenyl 63 50-150 0511812314:28 051301231502 1 Eurofins Denver Page 50 of 160 6/1/2023 Client Sample Results Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon Method: NWTPH-Dx - Northwest - Semi -Volatile Petroleum Products (GC) Client Sample ID: DU01-230504-0.5-Rep1 Lab Sample ID: 280-176200-16 Date Collected: 05/04/23 16:25 Matrix: Solid Date Received: 05/09/23 09:15 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac #2 Diesel (C10-C24) 16 J 49 12 mg/Kg 05/18/23 14:28 05/30/23 15:39 1 Motor Oil (>C24-C36) 200 49 17 mg/Kg 05/18/23 14:28 05/30/23 15:39 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac o-Terphenyl 67 50 -150 05118123 14:28 05130123 15:39 1 Client Sample ID: DU01-230504-0.5-Rep2 Lab Sample ID: 280-176200-17 Date Collected: 05/04/23 16:35 Matrix: Solid Date Received: 05/09/23 09:15 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac #2 Diesel (C10-C24) 15 J 49 12 mg/Kg 05/18/23 14:28 05/30/23 15:58 1 Motor Oil (>C24-C36) 190 49 17 mg/Kg 05/18/23 14:28 05/30/23 15:58 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac o-Terphenyl 66 50-150 05118123 14:28 05130123 15:58 1 Client Sample ID: DU02-230504-0.5 Lab Sample ID: 280-176200-18 Date Collected: 05/04/23 17:00 Matrix: Solid Date Received: 05/09/23 09:15 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac #2 Diesel (C10-C24) 12 J 49 12 mg/Kg 05/18/23 14:28 05/30/23 16:17 1 Motor Oil (>C24-C36) 110 49 17 mg/Kg 05/18/23 14:28 05/30/23 16:17 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac o-Terphenyl 63 50-150 05/18/23 14:28 05/30/23 16:17 1 Client Sample ID: DU06-SU04-230505-0.5 Lab Sample ID: 280-176200-20 Date Collected: 05/05/23 10:45 Matrix: Solid Date Received: 05/09/23 09:15 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac #2 Diesel (C10-C24) 62 46 11 mg/Kg 05/18/23 14:28 05/30/23 16:36 1 Motor Oil (>C24-C36) 360 46 16 mg/Kg 05/18/23 14:28 05/30/23 16:36 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac o-Terphenyl 68 50-150 05118123 14:28 05130123 16:36 1 Client Sample ID: DU03-230505-0.5 Lab Sample ID: 280-176200-21 Date Collected: 05/05/23 11:15 Matrix: Solid Date Received: 05/09/23 09:15 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac #2 Diesel (C10-C24) 35 J 47 12 mg/Kg 05/18/23 14:28 05/30/23 21:03 1 Motor Oil (>C24-C36) 360 47 17 mg/Kg 05/18/23 14:28 05/30/23 21:03 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac o-Terphenyl 64 50 - 150 05118123 14:28 05130123 21:03 1 Client Sample ID: DU03-230505-0.5-Rep1 Lab Sample ID: 280-176200-22 Date Collected: 05/05/23 11:20 Matrix: Solid Date Received: 05/09/23 09:15 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac #2 Diesel (C10-C24) 27 J 50 12 mg/Kg 05/18/23 14:28 05/30/23 21:41 1 Motor Oil (>C24-C36) 300 50 18 mg/Kg 05/18/23 14:28 05/30/23 21:41 1 Eurofins Denver Page 51 of 160 6/1/2023 Client Sample Results Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon Method: NWTPH-Dx - Northwest - Semi -Volatile Petroleum Products (GC) (Continued) Surrogate %Recovery Qualifier Limits o-Terphenyl 65 50-150 Client Sample ID: DU03-230505-0.5-Rep2 Date Collected: 05/05/23 11:25 Date Received: 05/09/23 09:15 Analyte Result Qualifier RL #2 Diesel (C10-C24) 35 J 49 Motor Oil (>C24-C36) 360 49 Surrogate %Recovery Qualifier Limits o-Terphenyl 65 50-150 Method: SW846 60-10D Metals (ICP) Client Sample ID: DU05-SU06-230505-COMP01 Date Collected: 05/05/23 10:20 Date Received: 05/09/23 09:15 Analyte Result Qualifier Silver ND Arsenic 1.1 J Barium 44 Cadmium ND Chromium 7.6 Lead 4.3 Selenium ND Client Sample ID: DU05-SU06-230505-COMP02 Date Collected: 05/05/23 10:25 Date Received: 05/09/23 09:15 Analyte Result Qualifier Silver ND Arsenic 1.5 J Barium 57 Cadmium ND Chromium 11 Lead 5.9 Selenium ND Client Sample ID: B03-17 Date Collected: 05/03/23 13:15 Date Received: 05/09/23 09:15 Analyte Result Qualifier Lead 6.9 Client Sample ID: B02-8 Date Collected: 05/03/23 13:30 Date Received: 05/09/23 09:15 Analyte Result Qualifier i Lead 2.9 Prepared Analyzed Dil Fac 05118123 14:28 05/30/23 21:41 1 Lab Sample ID: 280-176200-23 Matrix: Solid MDL Unit D Prepared Analyzed Dil Fac 12 mg/Kg 05/18/23 14:28 05/30/23 22:00 1 17 mg/Kg 05/18/23 14:28 05/30/23 22.00 1 Prepared Analyzed Dil Fac 05/18/23 14:28 05130123 22:00 1 Lab Sample ID: 280-176200-3 Matrix: Solid Percent Solids: 82.7 RL MDL Unit D Prepared Analyzed Dil Fac 0.89 0.14 mg/Kg 05/11/2314:40 05/15/2313:13 1 1.8 0.59 mg/Kg 05/11/2314:40 05/15/2313:13 1 0.89 0.26 mg/Kg 05/11/2314:40 05/15/2313:13 1 0.45 0.037 mg/Kg 05/11/2314:40 05115/2313:13 1 1.3 0.11 mg/Kg 05/11/2314:40 05/15/2313:13 1 0.80 0.28 mg/Kg 05/11/2314:40 05/15/2313:13 1 1.6 0.77 mg/Kg a 05/11 /23 14:40 05/15/23 13:13 1 Lab Sample ID: 280-176200-4 Matrix: Solid Percent Solids: 83.5 RL MDL Unit D Prepared Analyzed Dil Fac 0.87 0.14 mg/Kg 3:� 05/11/2314:40 05/15/2313:17 1 1.7 0.58 mg/Kg � 05/11/2314:40 05/15/2313:17 1 0.87 0.26 mg/Kg 05/11/2314:40 05/15/2313:17 1 0.43 0.036 mg/Kg o 05/11/2314:40 05/15/2313:17 1 1.3 0.11 mg/Kg # 05/11/2314:40 05/15/2313:17 1 0.78 0.27 mg/Kg ff 05/11/2314:40 05/15/2313:17 1 1.6 0.75 mg/Kg o 05/11/2314:40 05/15/2313:17 1 Lab Sample ID: 280-176200-7 Matrix: Solid Percent Solids: 86.0 RL MDL Unit D Prepared Analyzed Dil Fac 0.71 0.24 mg/Kg � 05/16/23 15:07 05/19/23 05:30 1 Lab Sample ID: 280-176200-8 Matrix: Solid Percent Solids: 88.3 RL MDL Unit D Prepared Analyzed Dil Fac 0.69 0.24 mg/Kg iz 05/16/23 15:07 05/19/23 05:34 1 Eurofins Denver Page 52 of 160 6/1 /2023 Client Sample Results Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Method: SW846 6010D - Metals (ICP) Client Sample ID: DU07-230502-Native Date Collected: 05/02/23 18:30 Date Received: 05/09/23 09:15 Analyte Result Qualifier Silver ND Arsenic 2.3 Barium 81 Cadmium ND Chromium 20 B Lead 3.4 Selenium ND Client Sample ID: DU07-230502-Fill Date Collected: 05/02/23 18:45 Date Received: 05/09/23 09:15 Analyte Result Qualifier Silver ND Arsenic 4.9 Barium 200 Cadmium 0.045 J Chromium 31 B Lead 9.4 Selenium ND Client Sample ID: DU04-SU01-230504-0.5 Date Collected: 05/04/23 14:45 Date Received: 05/09/23 09:15 Analyte Result Qualifier Lead 9.5, Client Sample ID: DU06-SU03-230504-0.5 Date Collected: 05/04/23 15:30 Date Received: 05/09/23 09:15 Analyte Result Qualifier Silver ND Arsenic 2.2 Barium 57 Cadmium 0.13 J Chromium 14 B Lead 20 Selenium ND Client Sample ID: DU01-230504-0.5 Date Collected: 05/04/23 16:15 Date Received: 05/09/23 09:15 Analyte Result Qualifier Silver ND Arsenic 2.3 Barium 51 Cadmium 0.038 J Chromium 12 B Lead 5.2 Selenium ND Job ID: 280-176200-1 Lab Sample ID: 280-176200-10 Matrix: Solid RL MDL Unit D Prepared Analyzed Dil Fac 0.73 0.12 mg/Kg 05/22/23 07:43 05/22/23 21:40 1 1.5 0.49 mg/Kg 05/22/23 07:43 05/22/23 21:40 1 0.73 0.22 mg/Kg 05/22/23 07:43 05/22/23 21:40 1 0.37 0.030 mg/Kg 05/22/23 07:43 05/22/23 21:40 1 1.1 0.090 mg/Kg 05/22/23 07:43 05/22/23 21:40 1 0.66 0.23 mg/Kg 05/22/23 07:43 05/22/23 21:40 1 1.3 0.63 mg/Kg 05/22/23 07:43 05/22/23 21:40 1 Lab Sample ID: 280-176200-11 Matrix: Solid RL MDL Unit D Prepared Analyzed Dil Fac 0.75 0.12 mg/Kg 05/22/23 07:43 05/22/23 22:00 1 1.5 0.50 mg/Kg 05/22/23 07:43 05/22/23 22:00 1 0.75 0.22 mg/Kg 05/22/23 07:43 05/22/23 22:00 1 0.37 0.031 mg/Kg 05/22/23 07:43 05/22/23 22:00 1 1.1 0.092 mg/Kg 05/22/23 07:43 05/22/23 22:00 1 0.67 0.23 mg/Kg 05/22/23 07:43 05/22/23 22:00 1 1.3 0.64 mg/Kg 05/22/23 07:43 05/22/23 22:00 1 Lab Sample ID: 280-176200-13 Matrix: Solid RL MDL Unit D Prepared Analyzed Dil Fac 0.67 0.23 mg/Kg 05/22/23 07:43 05/22/23 22:21 1 Lab Sample ID: 280-176200-14 Matrix: Solid RL MDL Unit D Prepared Analyzed Dil Fac 0.72 0.12 mg/Kg 05/22/23 07:43 05/22/23 22:33 1 1.4 0.48 mg/Kg 05/22/23 07:43 05/22/23 22:33 1 0.72 0.21 mg/Kg 05/22/23 07:43 05/22/23 22:33 1 0.36 0.030 mg/Kg 05/22/23 07:43 05/22/23 22:33 1 1.1 0.089 mg/Kg 05/22/23 07:43 05/22/23 22:33 1 0.65 0.22 mg/Kg 05/22/23 07:43 05/22/23 22:33 1 1.3 0.62 mg/Kg 05/22/23 07:43 05/22/23 22:33 1 Lab Sample ID: 280-176200-15 Matrix: Solid RL MDL Unit D Prepared Analyzed Dil Fac 0.80 0.13 mg/Kg 05/22/23 07:43 05/22/23 22:45 1 1.6 0.53 mg/Kg 05/22/23 07:43 05/22/23 22:45 1 0.80 0.24 mg/Kg 05/22/23 07:43 05/22/23 22:45 1 0.40 0.033 mg/Kg 05/22/23 07:43 05/22/23 22:45 1 1.2 0.099 mg/Kg 05/22/23 07:43 05/22/23 22:45 1 0.72 0.25 mg/Kg 05/22/23 07:43 05/22/23 22:45 1 1.4 0.69 mg/Kg 05/22/23 07:43 05/22/23 22:45 1 Eurofins Denver Page 53 of 160 6/1 /2023 Client Sample Results Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon Method: SW846 601OD -Metals (ICP) Client Sample ID: DU01-230504-0.5-Repl Lab Sample ID: 280-176200-16 Date Collected: 05/04/23 16:25 Matrix: Solid Date Received: 05/09/23 09:15 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Silver ND 0.71 0.11 mg/Kg 05/22/23 07:43 05/22/23 23:13 1 Arsenic 2.3 1.4 0.47 mg/Kg 05/22/23 07:43 05/22/23 23:13 1 Barium 56 0.71 0.21 mg/Kg 05/22/23 07:43 05/22/23 23:13 1 Cadmium 0.035 J 0.35 0.029 mg/Kg 05/22/23 07:43 05/22/23 23:13 1 Chromium 13 B 1.1 0.087 mg/Kg 05/22/23 07:43 05/22/23 23:13 1 Lead 4.8 0.64 0.22 mg/Kg 05/22/23 07:43 05/22/23 23:13 1 Selenium ND 1.3 0.61 mg/Kg 05/22/23 07:43 05/22/23 23:13 1 Client Sample ID: DU01-230504-0.5-Rep2 Lab Sample ID: 280-176200-17 Date Collected: 05/04/23 16:35 Matrix: Solid Date Received: 05/09/23 09:15 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Silver ND 0.73 0.12 mg/Kg 05/22/23 07:43 05/22/23 23:18 1 Arsenic 2.2 1.5 0.49 mg/Kg 05/22/23 07:43 05/22/23 23:18 1 Barium 53 0.73 0.22 mg/Kg 05/22/23 07:43 05/22/23 23:18 1 Cadmium ND 0.37 0.030 mg/Kg 05/22/23 07:43 05/22/23 23:18 1 Chromium 11 B 1.1 0.090 mg/Kg 05/22/23 07:43 05/22/23 23:18 1 Lead 4.2 0.66 0.23 mg/Kg 05/22/23 07:43 05/22/23 23:18 1 Selenium ND 1.3 0.63 mg/Kg 05/22/23 07:43 05/22/23 23:18 1 Client Sample ID: DU02-230504-0.5 Lab Sample ID: 280-176200-18 Date Collected: 05/04/23 17:00 Matrix: Solid Date Received: 05/09/23 09:15 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Silver ND 0.76 0.12 mg/Kg 05/22/23 07:43 05/22/23 23:22 1 Arsenic 2.9 1.5 0.51 mg/Kg 05/22/23 07:43 05/22/23 23:22 1 Barium 110 0.76 0.23 mg/Kg 05/22/23 07:43 05/22/23 23:22 1 Cadmium 0.058 J 0.38 0.031 mg/Kg 05/22/23 07:43 05/22/23 23:22 1 Chromium 22 B 1.1 0.094 mg/Kg 05/22/23 07:43 05/22/23 23:22 1 Lead 11 0.69 0.24 mg/Kg 05/22/23 07:43 05/22/23 23:22 1 Selenium ND 1.4 0.66 mg/Kg 05/22/23 07:43 05/22/23 23:22 1 F_ Client Sample ID: DU06-SU04-230505-0.5 Lab Sample ID: 280-176200-20 Date Collected: 05/05/23 10:45 Matrix: Solid i Date Received: 05/09/23 09:15 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Silver ND 0.67 0.11 mg/Kg 05/22/23 07:43 05/22/23 23:26 1 Arsenic 2.3 1.3 0.44 mg/Kg 05/22/23 07:43 05/22/23 23:26 1 Barium 49 0.67 0.20 mg/Kg 05/22/23 07:43 05/22/23 23:26 1 Cadmium 0.11 J 0.33 0.027 mg/Kg 05/22/23 07:43 05/22/23 23:26 1 Chromium 21 B 1.0 0.082 mg/Kg 05/22/23 07:43 05/22/23 23:26 1 Lead 20 0.60 0.21 mg/Kg 05/22/23 07:43 05/22/23 23:26 1 Selenium ND 1.2 0.58 mg/Kg 05/22/23 07:43 05/22/23 23:26 1 Client Sample ID: DU03-230505-0.5 Date Collected: 05/05/23 11:15 Date Received: 05/09/23 09:15 Analyte Result Qualifier Silver ND Arsenic 2.2 Lab Sample ID: 280-176200-21 Matrix: Solid RL MDL Unit D Prepared Analyzed Dil Fac 0.68 0.11 mg/Kg 05/22/23 07:43 05/22/23 23:30 1 1.4 0.46 mg/Kg 05/22/23 07:43 05/22/23 23:30 1 Eurofins Denver Page 54 of 160 6/1 /2023 Client Sample Results Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Method: SW846 6010D - Metals (ICPI (Continued) Client Sample ID: DU03-230505-0.5 Date Collected: 05/05/23 11:15 Date Received: 05/09/23 09:15 Analyte Barium Cadmium Chromium Lead Selenium Job ID: 280-176200-1 Lab Sample ID: 280-176200-21 Matrix: Solid Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 75 0.68 0.20 mg/Kg 05/22/23 07:43 05/22/23 23:30 1 0.047 J 0.34 0.028 mg/Kg 05/22/23 07:43 05/22/23 23:30 1 15 B 1.0 0.084 mg/Kg 05/22/23 07:43 05/22/23 23:30 1 8.2 0.62 0.21 mg/Kg 05/22/23 07:43 05/22/23 23:30 1 ND 1.2 0.59 mg/Kg 05/22/23 07:43 05/22/23 23:30 1 Client Sample ID: DU03-230505-0.5-Repl Date Collected: 05/05/23 11:20 Date Received: 05/09/23 09:15 Analyte Result Qualifier Silver ND Arsenic 2.3 Barium 95 Cadmium 0.046 J Chromium 18 B Lead 7.5 Selenium ND Client Sample ID: DU03-230505-0.5-Rep2 Date Collected: 05/05/23 11:25 Date Received: 05/09/23 09:15 Analyte Result Qualifier Silver ND Arsenic 2.3 Barium 98 Cadmium 0.059 J Chromium 18 B Lead 8.7 Selenium ND Method: SW846 6010D - Metals (ICP) - Dissolved Client Sample ID: DU05-SU05-230505-Pond01 Date Collected: 05/05/23 10:00 Date Received: 05/09/23 09:15 Analyte Result Qualifier Silver ND Arsenic ND Barium 57 Cadmium 0.29 J Chromium 1.8 J Lead ND Selenium ND Client Sample ID: DU05-SU05-230505-Pond02 Date Collected: 05/05/23 10:05 Date Received: 05/09/23 09:15 Analyte Result Qualifier Silver ND Arsenic ND Barium 40 Lab Sample ID: 280-176200-22 Matrix: Solid RL MDL Unit D Prepared Analyzed Dil Fac 0.76 0.12 mg/Kg 05/22/23 07:43 05/22/23 23:34 1 1.5 0.50 mg/Kg 05/22/23 07:43 05/22/23 23:34 1 0.76 0.22 mg/Kg 05/22/23 07:43 05/22/23 23:34 1 0.38 0.031 mg/Kg 05/22/23 07:43 05/22/23 23:34 1 1.1 0.093 mg/Kg 05/22/23 07:43 05/22/23 23:34 1 0.68 0.24 mg/Kg 05/22/23 07:43 05/22/23 23:34 1 1.4 0.65 mg/Kg 05/22/23 07:43 05/22/23 23:34 1 Lab Sample ID: 280-176200-23 Matrix: Solid RL MDL Unit D Prepared Analyzed Dil Fac 0.72 0.12 mg/Kg 05/22/23 07:43 05/22/23 23:38 1 1.4 0.48 mg/Kg 05/22/23 07:43 05/22/23 23:38 1 0.72 0.21 mg/Kg 05/22/23 07:43 05/22/23 23:38 1 0.36 0.030 mg/Kg 05/22/23 07:43 05/22/23 23:38 1 1.1 0.089 mg/Kg 05/22/23 07:43 05/22/23 23:38 1 0.65 0.22 mg/Kg 05/22/23 07:43 05/22/23 23:38 1 1.3 0.62 mg/Kg 05/22/23 07:43 05/22/23 23:38 1 Lab Sample ID: 280-176200-1 Matrix: Water RL MDL Unit D Prepared Analyzed Dil Fac 10 2.0 ug/L 05/11/23 07:42 05/13/23 01:28 1 15 4.4 ug/L 05/11/23 07:42 05/13/23 01:28 1 10 0.82 ug/L 05/11/23 07:42 05/13/23 01:28 1 5.0 0.13 ug/L 05/11/23 07:42 05/13/23 01:28 1 10 0.66 ug/L 05/11/23 07:42 05/13/23 01:28 1 9.0 2.7 ug/L 05/11/23 07:42 05/13/23 01:28 1 20 6.3 ug/L 05/11/23 07:42 05/13/23 01:28 1 Lab Sample ID: 280-176200-2 Matrix: Water RL MDL Unit D Prepared Analyzed Dil Fac 10 2.0 ug/L 05/11/23 07:42 05/13/23 01:32 1 15 4.4 ug/L 05/11/23 07:42 05/13/23 01:32 1 10 0.82 ug/L 05/11/23 07:42 05/13/23 01:32 1 Eurofins Denver 0 Page 55 of 160 6/1/2023 Client Sample Results Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Method: SW846 6010D - Metals (ICP) - Dissolved (Continued) Client Sample ID: DU05-SU05-230505-Pond02 Date Collected: 05/05/23 10:05 Date Received: 05/09/23 09:15 Analyte Result Qualifier RL MDL Unit Cadmium 0.19 J 5.0 0.13 ug/L Chromium 1.1 J 10 0.66 ug/L Lead ND 9.0 2.7 ug/L Selenium ND 20 6.3 ug/L Client Sample ID: B03-19GW Date Collected: 05/03/23 14:00 Date Received: 05/09/23 09:15 Lab Sample ID: 280-176200-2 Matrix: Water D Prepared Analyzed DII Fac 05/11/23 07:42 05/13/23 01:32 1 05/11/23 07:42 05/13/23 01:32 1 05111 /23 07:42 05/13/23 01:32 1 05/11/23 07:42 05/13/23 01:32 1 Lab Sample ID: 280-176200-5 Matrix: Water Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Lead ND 9.0 2.7 ug/L 05/11/23 07:42 05/13/23 01:36 1 Client Sample ID: B02-15GW Lab Sample ID: 280-176200-6 Date Collected: 05/03/23 15:00 Matrix: Water Date Received: 05/09/23 09:15 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dill Fac Lead ND 9.0 2.7 ug/L 05/11/23 07:42 05/13/23 01:41 1 Method: SW846 7470A - Mercury (CVAA) - Dissolved Client Sample ID: DU05-SU05-230505-Pond01 Lab Sample ID: 280-176200-1 Date Collected: 05/05/23 10:00 Matrix: Water Date Received: 05/09/23 09:15 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Mercury ND 0.20 0.061 ug/L 05/23/23 17:26 05/23/23 23:23 1 Client Sample ID: DU05-SU05-230505-Pond02 Lab Sample ID: 280-176200-2 Date Collected: 05/05/23 10:05 Matrix: Water Date Received: 05/09/23 09:15 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dill Fac Mercury ND 0.20 0.061 ug/L 06/23/23 17:26 05/23/23 23:30 1 Method: SW846 7471 B - Mercury (CVAA) Client Sample ID: DU05-SU06-230505-COMP01 Lab Sample ID: 280-176200-3 Date Collected: 05/05/23 10:20 Matrix: Solid Date Received: 05/09/23 09:15 Percent Solids: 82.7 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dill Fac Mercury 0.013 J 0.021 0.0069 mg/Kg 05/22/23 15:20 05/22/23 21:51 1 Client Sample ID: DU05-SU06-230505-COMP02 Lab Sample ID: 280-176200-4 Date Collected: 05/05/23 10:25 Matrix: Solid Date Received: 05/09/23 09:15 Percent Solids: 83.5 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Mercury 0.014 J 0.023 0.0074 mg/Kg 05/22/23 15:20 05/22/23 21:53 1 Client Sample ID: DU07-230502-Native Lab Sample ID: 280-176200-10 Date Collected: 05/02/23 18:30 Matrix: Solid Date Received: 05/09/23 09:15 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Mercury 0.019 0.017 0.0056 mg/Kg 05/22/23 15:20 05/22/23 23:25 1 Eurofins Denver Page 56 of 160 6/1/2023 Client Sample Results Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon General Chemistry Client Sample ID: DU04-SU01-230504-0.5 Date Collected: 05/04/23 14:45 Date Received: 05/09/23 09:15 Analyte Result Qualifier Incremented sample generated True (EPA Increment, prep) Client Sample ID: DU06-SU03-230504-0.5 Date Collected: 05/04/23 15:30 Date Received: 05/09/23 09:15 Analyte Result Qualifier Incremented sample generated True (EPA Increment, prep) Client Sample ID: DU01-230504-0.5 Date Collected: 05/04/23 16:15 Date Received: 05/09/23 09:15 Analyte Result Qualifier Incremented sample generated True (EPA Increment, prep) Client Sample ID: DU01-230504-0.5-Rep1 Date Collected: 05/04/23 16:25 Date Received: 05/09/23 09:15 Analyte Result Qualifier Incremented sample generated True (EPA Increment, prep) Client Sample ID: DU01-230504-0.5-Rep2 Date Collected: 05/04/23 16:35 Date Received: 05/09/23 09:15 Analyte Result Qualifier Incremented sample generated True (EPA Increment, prep) Client Sample ID: DU02-230504-0.5 Date Collected: 05/04/23 17:00 Date Received: 05/09/23 09:15 Analyte Result Qualifier Incremented sample generated True (EPA Increment, prep) Client Sample ID: DU06-SU04-230505-0.5 Date Collected: 05/05/23 10:45 Date Received: 05/09/23 09:15 Analyte Result Qualifier Incremented sample generated True (EPA Increment, prep) Client Sample ID: DU03-230505-0.5 Date Collected: 05/05/23 11:15 Date Received: 05/09/23 09:15 Analyte Result Qualifier Incremented sample generated True (EPA Increment, prep) RL Job ID: 280-176200-1 Lab Sample ID: 280-176200-13 Matrix: Solid MDL Unit D Prepared Analyzed Dil Fac NONE 05/10/23 14:44 1 Lab Sample ID: 280-176200-14 Matrix: Solid RL MDL Unit D Prepared Analyzed Dill Fac • NONE 05/10/23 14:44 1 Lab Sample ID: 280-176200-15 Matrix: Solid RL MDL Unit D Prepared Ana"d Dil Fac NONE 05/10/23 14:50 1 Lab Sample ID: 280-176200-16 Matrix: Solid RL MDL Unit D Prepared Analyzed Dil Fac NONE 05/10/23 14:50 1 Lab Sample ID: 280-176200-17 Matrix: Solid RL MDL Unit D Prepared Analyzed Dil Fac NONE 05/10/23 14:50 1 Lab Sample ID: 280-176200-18 Matrix: Solid RL MDL Unit D Prepared Analyzed DII Fac NONE 05/10/23 14:50 1 Lab Sample ID: 280-176200-20 Matrix: Solid RL MDL Unit D Prepared Analyzed Dil Fac NONE 05/10/23 14:44 1 Lab Sample ID: 280-176200-21 Matrix: Solid RL MDL Unit D Prepared Analyzed Dil Fac NONE 05/10/23 14:50 1 Eurofins Denver Page 59 of 160 6/1 /2023 Client Sample Results Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon General Chemistry Client Sample ID: DU03-230505-0.5-Rep1 Date Collected: 05/05/23 11:20 Date Received: 05/09/23 09:15 Analyte Result Qualifier Incremented sample generated True (EPA Increment, prep) Client Sample ID: DU03-230505-0.5-Rep2 Date Collected: 05/05/23 11:25 Date Received: 05/09/23 09:15 Analyte Result Qualifier Incremented sample generated True (EPA Increment, prep) if.771�If�:I�airll•��I�31 Lab Sample ID: 280-176200-22 Matrix: Solid RL MDL Unit D Prepared Analyzed Dil Fac NONE 05/10/23 14:50 1 Lab Sample ID: 280-176200-23 Matrix: Solid RL MDL Unit D Prepared Analyzed Dil Fac NONE 05/10/23 14:50 1 Eurofins Denver Page 60 of 160 6/1/2023 Surrogate Summary Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon Method: 8260D - Volatile Organic Compounds by GC/MS Matrix: Water Prep Type: Total/NA Percent Surrogate Recovery (Acceptance Limits) Lab Sample ID Client Sample ID DCA (70-127) TOL (80-125) BFB (78-120) DBFM (77-120) 240-184832-D-31 MS Matrix Spike 97 105 105 97 240-184832-1-31 MSD Matrix Spike Duplicate 97 105 103 97 280-175962-B-4 MS Matrix Spike 103 96 100 101 280-175962-C-4 MSD Matrix Spike Duplicate 104 97 101 101 280-176200-1 DU05-SU05-230505-Pond01 100 103 101 98 280-176200-2 DU05-SU05-230505-Pond02 100 103 102 97 280-176200-5 B03-19GW 98 100 100 98 280-176200-6 B02-15GW 103 96 102 107 280-176200-9 TB-230507-01 94 104 104 96 280-176200-19 TB-230507-02 94 104 102 96 280-176296-W-3 MS Matrix Spike 99 99 99 99 280-176296-W-3 MSD Matrix Spike Duplicate 98 98 100 97 LCS 280-612565/1002 Lab Control Sample 99 99 100 100 LCS 280-612584/1002 Lab Control Sample 99 102 104 100 LCS 280-612868/1002 Lab Control Sample 99 104 101 97 LCS 280-612891/1002 Lab Control Sample 92 102 102 98 LCSD 280-61256514 Lab Control Sample Dup 102 99 99 101 LCSD 280-612584/4 Lab Control Sample Dup 98 100 104 101 LCSD 280-612868/4 Lab Control Sample Dup 99 104 102 98 LCSD 280-612891/4 Lab Control Sample Dup 93 102 103 97 MB 280-612565/7 Method Blank 105 97 102 106 MB 280-612584/7 Method Blank 99 101 101 98 MB 280-61286817 Method Blank 102 103 101 98 MB 280-61289117 Method Blank 93 103 103 97 Surrogate Legend DCA= 1,2-Dichloroethane-d4 (Surr) TOL = Toluene-d8 (Surr) BFB = 4-Bromofluorobenzene (Surr) DBFM = Dibromofluoromethane (Surr) Method: NWTPH-Gx - Northwest - Volatile Petroleum Products (GC/MS) Matrix: Solid BFB Lab Sample ID Client Sample ID (66-125) 280-176200-3 DU05-SU06-230505-COMP01 100 280-176200-4 DU05-SU06-230505-COMP02 100 280-176200-7 B03-17 102 B02-8 103 i280-176200-8 Surrogate Legend L BFB = 4-Bromofluorobenzene (Surr) Prep Type: Total/NA Percent Surrogate Recovery (Acceptance Limits) Eurofins Denver 0 Page 61 of 160 6/1/2023 Surrogate Summary Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon Method: NWTPH-Gx - Northwest - Volatile Petroleum Products (GC/MS) Matrix: Water Prep Type: Total/NA Percent Surrogate Recovery (Acceptance Limits) BFB Lab Sample ID Client Sample ID (77-123) 280-176200-1 DU05-SU05-230505-Pond01 88 280-176200-2 DU05-SU05-230505-Pond02 92 280-176200-5 B03-19GW 83 280-176200-6 B02-15GW 88 LCS 580-425808/9 Lab Control Sample 100 LCSD 580-425808/10 Lab Control Sample Dup 103 MB 580-425808/6 Method Blank 88 Surrogate Legend BFB = 4-Bromofluorobenzene (Surr) Method: 8270D - Semivolatile Organic Compounds (GC/MS) Matrix: Solid Prep Type: Total/NA Percent Surrogate Recovery (Acceptance Limits) FBP 2FP TBP NBZ PHL TPHL Lab Sample ID Client Sample ID (33-135) (39-135) (24-135) (32-135) (39-135) (30-135) 280-176200-15 DU01-230504-0.5 90 86 95 83 91 107 280-176200-15 MS DU01-230504-0.5 98 95 109 93 104 111 280-176200-15 MSD DU01-230504-0.5 99 99 99 97 106 111 280-176200-16 DU01-230504-0.5-Rep1 95 91 93 90 98 112 280-176200-17 DU01-230504-0.5-Rep2 101 94 100 92 105 112 LCS 280-612492/2-A Lab Control Sample 102 100 115 101 110 114 MB 280-612492/1-A Method Blank 101 97 90 98 104 123 Surrogate Legend FBP = 2-Fluorobiphenyl 2FP = 2-Fluorophenol (Surr) TBP = 2,4,6-Tribromophenol (Surr) NBZ = Nitrobenzene-d5 (Surr) PHL = Phenol-d5 (Surr) TPHL = Terphenyl-d14 (Surr) --- -- ---- -- ------------............ .----- ._-......— Method: 8270D SIM - Semivolatile Organic Compounds (GC/MS SIM) ---- -- - -- - - - Matrix: Solid Prep Type: Total/NA Lab Sample ID Client Sample ID FBP (42-104) Percent Surrogate Recovery (Acceptance Limits) NBZ TPHL (14-139) (46-125) 280-176141-6-1-B MS Matrix Spike 66 80 93 280-176141-B-1-C MSD Matrix Spike Duplicate 63 67 90 280-176200-3 DU05-SU06-230505-COMP01 71 74 106 280-176200-4 DU05-SU06-230505-COMP02 69 76 101 280-176200-7 B03-17 57 42 88 280-176200-8 B02-8 59 40 80 280-176200-10 DU07-230502-Native 46 45 55 280-176200-11 DU07-230502-Fill 44 43 45 S1- 280-176200-13 DU04-SU01-230504-0.5 58 54 67 280-176200-13 MS DU04-SU01-230504-0.5 59 67 54 280-176200-13 MSD DU04-SU01-230504-0.5 61 67 58 280-176200-14 DU06-SU03-230504-0.5 68 64 70 280-176200-18 DU02-230504-0.5 65 68 Eurofins Denver Page 62 of 160 6/1 /2023 Surrogate Summary Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon Method: 8270D SIM - Semivolatile Organic Compounds (GC/MS SIM) (Continued) Matrix: Solid Prep Type: Total/NA Percent Surrogate Recovery (Acceptance Limits) FBP NBZ TPHL Lab Sample ID Client Sample ID (42-104) (14-139) (46-125) 280-176200-18 - DL DU02-230504-0.5 67 58 67 280-176200-20 DU06-SU04-230505-0.5 63 55 57 280-176200-21 DU03-230505-0.5 59 65 54 280-176200-22 DU03-230505-0.5-Rep1 60 68 51 280-176200-23 DU03-230505-0.5-Rep2 62 66 54 LCS 280-612097/2-A Lab Control Sample 74 70 91 LCS 280-612481/2-A Lab Control Sample 60 54 75 MB 280-612097/1-A Method Blank 67 62 119 MB 280-612481/1-A Method Blank 65 62 84 Surrogate Legend FBP = 2-Fluorobiphenyl NBZ = Nitrobenzene-d5 TPHL = Terphenyl-d14 Method: 8270D SIM - Semivolatile Organic Compounds (GC/MS SIM) Matrix: Water Prep Type: Total/NA Lab Sample ID Client Sample ID FBP (26-114) Percent Surrogate Recovery (Acceptance Limits) NBZ TPHL (18-126) (36-131) 280-176115-A-2-B MS Matrix Spike 54 51 76 280-176115-A-2-C MSD Matrix Spike Duplicate 55 52 83 280-176200-1 DU05-SU05-230505-Pond01 37 39 47 280-176200-2 DU05-SU05-230505-Pond02 42 42 69 280-176200-5 B03-19GW 60 57 76 280-176200-6 B02-15GW 57 57 69 280-176284-E-4-A MS Matrix Spike 51 51 57 280-176284-E-4-B MSD Matrix Spike Duplicate 54 49 83 LCS 280-611929/2-A Lab Control Sample 56 49 97 LCS 280-612087/2-A Lab Control Sample 57 57 64 LCSD 280-612087/3-A Lab Control Sample Dup 58 61 68 MB 280-611929/1-A Method Blank 77 75 86 MB 280-612087/1-A Method Blank 59 62 68 Surrogate Legend FBP = 2-Fluorobiphenyl NBZ = Nitrobenzene-d5 TPHL = Terphenyl-d14 Method: 8082A - Polychlorinated Biphenyls (PCBs) by Gas Chromatography Matrix Solid Prep Type: Total/NA Percent Surrogate Recovery (Acceptance Limits) Lab Sample ID Client Sample ID TCX2 (53-128) DCBP1 (69-130) 280-176200-10 D1.107-230502-Native 91 101 280-176200-11 DU07-230502-Fill 97 102 280-176200-12 DU04-SU02-230504-0.5 87 87 280-176200-13 DU04-SU01-230504-0.5 90 86 MB 280-612472/1-A Method Blank 100 113 Eurofins Denver Page 63 of 160 6/1/2023 Surrogate Summary Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon Surrogate Legend TCX = Tetrachloro-m-xylene DCBP = DCB Decachlorobiphenyl Method: 8082A - Polychlorinated Biphenyls (PCBs) by Gas Chromatography Matrix: Solid Prep Type: Total/NA Percent Surrogate Recovery (Acceptance Limits) TCX1 DCBP2 Lab Sample ID Client Sample ID (53-128) (59-130) 280-176200-14 DU06-SU03-230504-0.5 105 87 280-176200-14 MS DU06-SU03-230504-0.5 87 84 280-176200-14 MSD DU06-SU03-230504-0.5 74 81 Surrogate Legend TCX = Tetrachloro-m-xylene DCBP = DCB Decachlorobiphenyl Method: 8082A - Polychlorinated Biphenyls (PCBs) by Gas Chromatography Matrix: Solid Prep Type: Total/NA Lab Sample ID Client Sample ID TCX1 (53-128) Percent Surrogate Recovery (Acceptance Limits) DCBP1 (59-130) 280-176200-3 DU05-SU06-230505-COMP01 111 87 280-176200-4 DU05-SU06-230505-COMP02 110 85 280-176200-20 DU06-SU04-230505-0.5 119 77 LCS 280-612472/2-A Lab Control Sample 123 106 Surrogate Legend TCX = Tetrachloro-m-xylene DCBP = DCB Decachlorobiphenyl Method: NWTPH-Dx - Northwest - Semi -Volatile Petroleum Products (GC) Matrix: Solid Prep Type: Total/NA Percent Surrogate Recovery (Acceptance Limits) Lab Sample ID Client Sample ID OTPH (50-150) 280-176200-3 DU05-SU06-230505-COMP01 70 280-176200-3 DU DU05-SU06-230505-COMP01 66 280-176200-4 DU05-SU06-230505-COMP02 70 280-176200-7 B03-17 72 280-176200-8 B02-8 73 280-176200-10 DU07-230502-Native 61 280-176200-10 DU DU07-230502-Native 63 280-176200-11 DU07-230502-Fill 64 280-176200-13 DU04-SU01-230504-0.5 63 280-176200-14 DU06-SU03-230504-0.5 75 280-176200-15 DU01-230504-0.5 63 280-176200-16 DU01-230504-0.5-Rep1 67 280-176200-17 DU01-230504-0.5-Rep2 66 280-176200-18 DU02-230504-0.5 63 280-176200-20 DU06-SU04-230505-0.5 68 280-176200-21 DU03-230505-0.5 64 280-176200-21 DU DU03-230505-0.5 65 280-176200-22 DU03-230505-0.5-Rep1 65 280-176200-23 DU03-230505-0.5-Rep2 65 Eurofins Denver 0 Page 64 of 160 6/1/2023 Surrogate Summary Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Job ID: 280-176200-1 Method: NWTPH-Dx - Northwest - Semi -Volatile Petroleum Products (GC) (Continued) Matrix: Solid Prep Type: TotaliNA Percent Surrogate Recovery (Acceptance Limits) OTPH Lab Sample ID Client Sample ID (50-150) LCS 580-425843/2-A Lab Control Sample 81 LCS 580-426406/2-A Lab Control Sample 84 LCSD 580-425843/3-A Lab Control Sample Dup 78 LCSD 580-426406/3-A Lab Control Sample Dup 85 MB 580-425843/1-A Method Blank 67 MB 580-426406/1-A Method Blank 62 Surrogate Legend OTPH = o-Terphenyl Method: NWTPH-Dx - Northwest - Semi -Volatile Petroleum Products (GC) Matrix: Water Prep Type: Total/NA Percent Surrogate Recovery (Acceptance Limits) OTPH Lab Sample ID Client Sample ID (50-150) 280-176200-1 6U05-SU05-230505-Pond01 63 280-176200-2 DU05-SU05-230505-Pond02 71 280-176200-5 B03-19GW 66 280-176200-6 B02-15GW 67 LCS 580-425673/2-A Lab Control Sample 85 LCSD 580-425673/3-A Lab Control Sample Dup 95 MB 580-425673/1-A Method Blank 66 Surrogate Legend OTPH = o-Terphenyl Eurofins Denver Page 65 of 160 6/1/2023 QC Sample Results Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Method: 8260D - Volatile Organic Compounds by GC/MS Lab Sample ID: MB 280-61256517 Matrix: Water Analysis Batch: 612565 MB MB Analyte Result Qualifier RL MDL Unit Job ID: 280-176200-1 Client Sample ID: Method Blank Prep Type: Total/NA D Prepared Analyzed Dil Fac Acetone ND 15 6.6 ug/L 05/15/23 19:23 1 2-Butanone (MEK) ND 15 6.0 ug/L 05/15/23 19:23 1 Benzene ND 1.0 0.31 ug/L 05/15/23 19:23 1 Chlorobenzene ND 1.0 0.42 ug/L 05/15/23 19:23 1 Carbon disulfide ND 2.0 0.63 ug/L 05/15/23 19:23 1 Carbon tetrachloride ND 1.0 0.57 ug/L 05/15/23 19:23 1 Cyclohexane ND 1.0 0.44 ug/L 05/15/23 19:23 1 1,2-Dibromo-3-Chloropropane ND 5.0 1.8 ug/L 05/15/23 19:23 1 Bromomethane ND 5.0 2.4 ug/L 05/15/23 19:23 1 Bromoform ND 2.0 1.2 ug/L 05/15/23 19:23 1 m Chloroethane ND 4.0 1.4 ug/L 05/15/23 19:23 1 Chloroform ND 1.0 0.36 ug/L 05/15/23 19:23 1 Chlorobromomethane ND 1.0 0.40 ug/L 05/15/23 19:23 1 Dichlorobromomethane ND 1.0 0.39 ug/L 05/1512319:23 1 Chlorodibromomethane ND 2.0 0.62 ug/L 05/15/23 19:23 1 Isop ropylbenzene ND 1.0 0.36 ug/L 05/15/23 19:23 1 2-Hexanone ND 5.0 1.7 ug/L 05/15/23 19:23 1 Chloromethane ND 2.0 0.75 ug/L 05/15/23 19:23 1 Dichlorodifluoromethane ND 3.0 0.96 ug/L 05/15/23 19:23 1 trans-1,2-Dichloroethene ND 1.0 0.37 ug/L 05/15/23 19:23 1 trans-1,3-Dichloropropene ND 2.0 0.65 ug/L 05/15/23 19:23 1 Methylene Chloride ND 2.0 0.94 ug/L 05/15/23 19:23 1 Methyl acetate ND 5.0 1.6 ug/L 05/15/23 19:23 1 Methyl tert-butyl ether ND 5.0 0.25 ug/L 05/15/23 19:23 1 4-Methyl-2-pentanone (MIBK) ND 5.0 0.98 ug/L 05/15/23 19:23 1 Methylcyclohexane ND 1.0 0.31 ug/L 05/15/23 19:23 1 Styrene ND 1.0 0.36 ug/L 05/15/23 19:23 1 1,1,2,2-Tetrachloroethane ND 1.0 0.21 ug/L 05/15/23 19:23 1 1,2,3-Trichlorobenzene ND 2.0 0.70 ug/L 05/15/23 19:23 1 1,2,4-Trichlorobenzene ND 1.0 0.58 ug/L 05/15/23 19:23 1 Toluene ND 1.0 0.32 ug/L 05/15/23 19:23 1 1,1,1-Trichloroethane ND 1.0 0.39 ug/L 05/15/23 19:23 1 1,1,2-Trichloroethane ND 1.0 0.27 ug/L 05/1512319:23 1 Trichloroethene ND 1.0 0.30 ug/L 05/15/23 19:23 1 1,1,2-Trichloro-1,2,2-tdfluoroethane ND 3.0 0.73 ug/L 05/15/23 19:23 1 Vinyl chloride ND 2.0 0.51 ug/L 05/15/23 19:23 1 m-Xylene & p-Xylene ND 2.0 0.36 ug/L 05/15/23 19:23 1 o-Xylene ND 1.0 0.33 ug/L 05/15/23 19:23 1 Tetrachloroethene ND 1.0 0.40 ug/L 05/15/23 19:23 1 1,2-Dichlorobenzene ND 1.0 0.37 ug/L 05/15/23 19:23 1 1,3-Dichlorobenzene ND 1.0 0.33 ug/L 05/15/23 19:23 1 1,4-Dichlorobenzene ND 1.0 0.39 ug/L 05/15/23 19:23 1 cis- 1,2-Dichloroethene ND 1.0 0.32 ug/L 05/15/23 19:23 1 cis-1,3-Dichloropropene ND 2.0 0.63 ug/L 05/15/23 19:23 1 1,1-Dichloroethane ND 1.0 0.22 ug/L 05/15/23 19:23 1 1,1-Dichloroethene ND 1.0 0.23 ug/L 05/15/23 19:23 1 1,2-Dichloroethane ND 1.0 0.54 ug/L 05/15/23 19:23 1 1,2-Dichloropropane ND 1.0 0.52 ug/L 05/15/23 19:23 1 Eurofins Denver Page 66 of 160 6/1/2023 QC Sample Results Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Method: 8260D - Volatile Organic Compounds by GC/MS (Continued) Job ID: 280-176200-1 Lab Sample ID: MB 280-612565/7 Client Sample ID: Method Blank Matrix: Water Prep Type: Total/NA Analysis Batch: 612565 MB MB Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 1,4-Dioxane ND 150 19 ug/L 05/15/2319:23 1 Ethylbenzene ND 1.0 0.30 ug/L 05/15/2319:23 1 Ethylene Dibromide ND 1.0 0.40 ug/L 05/15/23 19:23 1 Trichlorofluoromethane ND 2.0 0.57 ug/L 05/15/2319:23 1 MB MB Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 1,2-Dichloroethane-d4 (Surr) 105 70- 127 65115123 19:23 1 Toluene-d8 (Surr) 97 80 -125 05115123 19:23 1 4-Bromofluorobenzene (Surr) 102 78 -120 05115123 19:23 1 1LDibromofluoromethane (Surr) 106 77- 120 05115123 19:23 1 F Lab Sample ID: LCS 280-612565/1002 Client Sample ID: Lab Control Sample Matrix: Water Prep Type: Total/NA Analysis Batch: 612565 Spike LCS LCS %Rec Analyte Added Result Qualifier Unit D %Rec Limits Acetone 200 174 ug/L 87 50 -137 2-Butanone (MEK) 200 172 ug/L 86 53 -135 Benzene 50.0 47.1 ug/L 94 69-126 Chlorobenzene 50.0 46.2 ug/L 92 78 -118 Carbon disulfide 50.0 45.0 ug/L 90 56 -128 Carbon tetrachloride 50.0 52.8 ug/L 106 60 -133 Cyclohexane 50.0 53.0 ug/L 106 57-134 1,2-Dibromo-3-Chloropropane 50.0 44.7 ug/L 89 58 -122 Bromomethane 50.0 48.0 ug/L 96 25 -163 Bromoform 50.0 51.8 ug/L 104 57-125 Chloroethane 50.0 49.3 ug/L 99 52-144 Chloroform 50.0 48.1 ug/L 96 68 -128 Chlorobromomethane 50.0 54.0 ug/L 108 71 -130 Dichlorobromomethane 50.0 53.4 ug/L 107 67-126 Chlorodibromomethane 50.0 51.8 ug/L 104 71 -122 Isopropylbenzene 50.0 49.3 ug/L 99 70-127 2-Hexanone 200 170 ug/L 85 58-134 Chloromethane 50.0 45.1 ug/L 90 43 -142 Dichlorodifluoromethane 50.0 54.0 ug/L 108 26-152 trans-1,2-Dichloroethene 50.0 45.7 ug/L 91 66-129 trans-1,3-Dichloropropene 50.0 52.0 ug/L 104 66-127 Methylene Chloride 50.0 47.6 ug/L 95 64 -128 Methyl acetate 100 92.7 ug/L 93 59 -133 Methyl tert-butyl ether 50.0 47.6 ug/L 95 70 - 127 4-Methyl-2-pentanone (MIBK) 200 178 ug/L 89 56-135 Methylcyclohexane 50.0 54.9 ug/L 110 58 -136 Styrene 50.0 53.4 ug/L 107 79 -120 1,1,2,2-Tetrachloroethane 50.0 49.4 ug/L 99 72-122 1,2,3-Trichlorobenzene 50.0 37.4 ug/L 75 70-127 1,2,4-Trichlorobenzene 50.0 49.8 ug/L 100 73 -124 j Toluene 50.0 47.7 ug/L 95 68 -127 1,1,1-Trichloroethane 50.0 49.5 ug/L 99 62-132 Eurofins Denver 110 Page 67 of 160 6/1/2023 QC Sample Results Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon Method: 8260D - Volatile Organic Compounds by GC/MS (Continued) Lab Sample ID: LCS 280-612565/1002 Client Sample ID: Lab Control Sample Matrix: Water Prep Type: Total/NA Analysis Batch: 612565 Spike LCS LCS %Rec Analyte Added Result Qualifier Unit D %Rec Limits 1,1,2-Trichloroethane 50.0 52.4 ug/L 105 72-128 Trichloroethene 50.0 47.1 ug/L 94 70 -125 1,1,2-Trichloro-1,2,2-trifluoroetha 50.0 54.9 ug/L 110 60-137 ne Vinyl chloride 50.0 48.6 ug/L 97 53-141 m-Xylene & p-Xylene 50.0 48.0 ug/L 96 76 -122 o-Xylene 50.0 48.3 ug/L 97 77 -120 Tetrachloroethene 50.0 52.3 ug/L 105 72-127 1,2-Dichlorobenzene 50.0 50.6 ug/L 101 77-121 1,3-Dichlorobenzene 50.0 47.5 ug/L 95 76-121 1,4-Dichlorobenzene 50.0 45.6 ug/L 91 76-119 cis- 1,2-Dichloroethene 50.0 47.4 ug/L 95 69 -126 cis-1,3-Dichloropropene 50.0 51.4 ug/L 103 75-120 1,1-Dichloroethane 50.0 46.9 ug/L 94 66-130 1,1-Dichloroethene 50.0 49.0 ug/L 98 62-130 1,2-Dichloroethane 50.0 47.7 ug/L 95 61-130 1,2-Dichloropropane 50.0 49.1 ug/L 98 68-127 1,4-Dioxane 1000 780 ug/L 78 59-134 Ethylbenzene 50.0 48.1 ug/L 96 76 -121 Ethylene Dibromide 50.0 50.9 ug/L 102 81 -118 Trichlorofluoromethane 50.0 56.6 ug/L 113 57 -144 LCS LCS Surrogate %Recovery Qualifier Limits 1,2-Dichloroethane-d4 (Surr) 99 70-127 Toluene-d8 (Surr) 99 80-125 4-Bromofluorobenzene (Surr) 100 78-120 Dibromofluoromethane (Surr) 100 77-120 r-Lab Sample ID: LCSD 280-612565/4 Client Sample ID: Lab Control Sample Dup Matrix: Water Prep Type: Total/NA Analysis Batch: 612565 Spike LCSD LCSD %Rec RPD Analyte Added Result Qualifier Unit D %Rec Limits RPD Limit Acetone 200 168 ug/L 84 50-137 4 21 2-Butanone (MEK) 200 165 ug/L 83 53 -135 4 20 Benzene 50.0 45.6 ug/L 91 69-126 3 20 Chlorobenzene 50.0 44.5 ug/L 89 78 -118 4 20 Carbon disulfide 50.0 42.9 ug/L 86 56 -128 5 20 Carbon tetrachloride 50.0 51.0 ug/L 102 60 -133 3 20 Cyclohexane 50.0 50.9 ug/L 102 57 -134 4 32 1,2-Dibromo-3-Chloropropane 50.0 40.6 ug/L 81 58-122 9 21 Bromomethane 50.0 48.0 ug/L 96 25 -163 0 40 Bromoform 50.0 50.0 ug/L 100 57 -125 4 20 Chloroethane 50.0 49.3 ug/L 99 52-144 0 30 Chloroform 50.0 47.0 ug/L 94 68-128 2 20 Chlorobromomethane 50.0 52.1 ug/L 104 71 -130 4 20 Dichlorobromomethane 50.0 52.3 ug/L 105 67-126 2 20 Chlorodibromomethane 50.0 49.7 ug/L 99 71 -122 4 20 Isopropyl benzene 50.0 46.2 ug/L 92 70-127 7 20 Eurofins Denver 10 Page 68 of 160 6/1/2023 QC Sample Results Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Method: 8260D - Volatile Organic Compounds by GC/MS (Continued Lab Sample ID: LCSD 280-612565/4 Matrix: Water Analysis Batch: 612565 Analyte 2-Hexanone Chloromethane Dichlorodifluoromethane trans-1,2-Dichloroethene trans-1,3-Dichloropropene Methylene Chloride Methyl acetate Methyl tert-butyl ether 4-Methyl-2-pentanone (MIBK) Methylcyclohexane Styrene 1,1,2,2-Tetrachloroethane 1,2,3-Trichlorobenzene 1,2,4-Trichlorobenzene Toluene 1,1,1-Trichloroethane 1,1,2-Trichloroethane Trichloroethene 1,1,2-Trichloro-1,2,2-trifluoroetha ne Vinyl chloride m-Xylene & p-Xylene o-Xylene Tetrachloroethene 1,2-Dichlorobenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene cis-1,2-Dichloroethene cis-1,3-Dichloropropene 1,1-Dichloroethane 1,1-Dichloroethene 1,2-Dichloroethane 1,2-Dichloropropane 1,4-Dioxane Ethylbenzene Ethylene Dibromide Trichlorofluorometha ne LCSD LCSD Surrogate %Recovery Qualifier 1,2-Dichloroethane-d4 (Surr) 102 Toluene-d8 (Surr) 99 4-Bromofluorobenzene (Surr) 99 Dibromofluoromethane (Surr) 101 Job ID: 280-176200-1 Client Sample ID: Lab Control Sample Dup Prep Type: Total/NA Spike LCSD LCSD %Rec RPD Added Result Qualifier Unit D %Rec Limits RPD Limit 200 164 ug/L 82 58 -134 4 21 50.0 44.9 ug/L 90 43 - 142 0 20 50.0 53.2 ug/L 106 26 -152 1 21 50.0 43.9 ug/L 88 66 -129 4 20 50.0 50.7 ug/L 101 66 -127 3 20 50.0 46.3 ug/L 93 64 -128 3 20 100 90.8 ug/L 91 59 -133 2 20 50.0 46.1 ug/L 92 70 -127 3 20 200 170 ug/L 85 56-135 4 20 50.0 53.5 ug/L 107 58 -136 3 21 m 50.0 51.4 ug/L 103 79 -120 4 20 50.0 46.6 ug/L 93 72 -122 6 20 50.0 35.9 ug/L 72 70 -127 4 20 50.0 46.9 ug/L 94 73 -124 6 20 50.0 46.2 ug/L 92 68 -127 3 20 50.0 48.2 ug/L 96 62 -132 3 20 50.0 50.5 ug/L 101 72 -128 4 20 50.0 46.0 ug/L 92 70 -125 2 20 50.0 53.0 ug/L 106 60 -137 4 23 50.0 49.0 ug/L 98 53 -141 1 25 50.0 46.6 ug/L 93 76 -122 3 20 50.0 47.3 ug/L 95 77 -120 2 20 50.0 50.0 ug/L 100 72 -127 4 20 50.0 47.9 ug/L 96 77 -121 6 20 50.0 45.5 ug/L 91 76 -121 4 20 50.0 42.7 ug/L 85 76 -119 7 20 50.0 46.2 ug/L 92 69 -126 3 20 50.0 50.0 ug/L 100 75 -120 3 20 50.0 45.4 ug/L 91 66 -130 3 20 50.0 47.2 ug/L 94 62 - 130 4 21 50.0 46.7 ug/L 93 61 -130 2 20 50.0 47.7 ug/L 95 68 -127 3 20 1000 787 ug/L 79 59 -134 1 24 50.0 46.6 ug/L 93 76 -121 3 20 50.0 49.9 ug/L 100 81 -118 2 20 50.0 55.5 ug/L 111 57 -144 2 28 Limits 70- 127 80 - 125 78 - 120 77- 120 Eurofins Denver Page 69 of 160 6/1 /2023 QC Sample Results Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Job ID: 280-176200-1 Method: 8260D - Volatile Organic Compounds by GC/MS (Continued) Lab Sample ID: 280-175962-B-4 MS Client Sample ID: Matrix Spike Matrix: Water Prep Type: Total/NA Analysis Batch: 612565 Sample Sample Spike MS MS %Rec Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits Acetone ND 200 172 ug/L 86 50-137 2-Butanone (MEK) ND 200 166 ug/L 83 53-135 Benzene ND 50.0 45.1 ug/L 90 69-126 Chlorobenzene ND 50.0 43.6 ug/L 87 78-118 Carbon disulfide ND 50.0 42.1 ug/L 84 56 -128 Carbon tetrachloride ND 50.0 51.2 ug/L 102 60 -133 Cyclohexane ND 50.0 50.6 ug/L 101 57-134 1,2-Dibromo-3-Chloropropane ND 50.0 39.6 ug/L 79 58-122 Bromomethane ND 50.0 27.6 ug/L 55 25-163 Bromoform ND 50.0 51.4 ug/L 103 57 -125 Chloroethane ND 50.0 48.7 ug/L 97 52 -144 Chloroform ND 50.0 46.9 ug/L 94 68 -128 Chlorobromomethane ND 50.0 51.5 ug/L 103 71 -130 Dichlorobromomethane ND 50.0 51.8 ug/L 104 67-126 Chlorodibromomethane ND 50.0 49.7 ug/L 99 71 -122 Isopropylbenzene ND 50.0 45.3 ug/L 91 70-127 2-Hexanone ND 200 167 ug/L 84 58-134 Chloromethane ND 50.0 43.1 ug/L 86 43-142 Dichlorod ifluoromethane ND 50.0 52.6 ug/L 105 26-152 trans-1,2-Dichloroethene ND 50.0 43.9 ug/L 88 66 -129 trans-1,3-Dichloropropene ND 50.0 49.6 ug/L 99 66 -127 Methylene Chloride ND 50.0 46.3 ug/L 93 64 -128 Methyl acetate ND 100 86.7 ug/L 87 59 -133 Methyl tert-butyl ether ND 50.0 46.0 ug/L 92 70 -127 4-Methyl-2-pentanone (MIBK) ND 200 174 ug/L 87 56-135 Methylcyclohexane ND 50.0 51.9 ug/L 104 58-136 Styrene ND 50.0 50.2 ug/L 100 79-120 1,1,2,2-Tetrachloroethane ND 50.0 47.7 ug/L 95 72-122 1,2,3-Trichlorobenzene ND 50.0 35.3 ug/L 71 70-127 1,2,4-Trichlorobenzene ND 50.0 44.4 ug/L 89 73-124 Toluene ND 50.0 45.7 ug/L 91 68-127 1,1,1-Trichloroethane ND 50.0 48.1 ug/L 96 62-132 1,1,2-Trichloroethane ND 50.0 51.0 ug/L 102 72-128 Trichloroethene ND 50.0 44.7 ug/L 89 70-125 1,1,2-Trichloro-1,2,2-trifluoroetha ND 50.0 52.2 ug/L 104 60-137 ne Vinyl chloride ND 50.0 46.5 ug/L 93 53-141 m-Xylene & p-Xylene ND 50.0 44.9 ug/L 90 76 -122 o-Xylene ND 50.0 46.0 ug/L 92 77 -120 Tetrachloroethene ND 50.0 50.1 ug/L 100 72 -127 1,2-Dichlorobenzene ND 50.0 46.8 ug/L 94 77 -121 1,3-Dichlorobenzene ND 50.0 44.2 ug/L 88 76-121 1,4-Dichlorobenzene ND 50.0 42.4 ug/L 85 76 -119 cis-1,2-Dichloroethene ND 50.0 45.4 ug/L 91 69 -126 cis- 1,3-Dichloropropene ND 50.0 46.1 ug/L 92 75 -120 1,1-Dichloroethane ND 50.0 45.5 ug/L 91 66-130 1,1-Dichloroethene ND 50.0 46.0 ug/L 92 62-130 1,2-Dichloroethane ND 50.0 46.5 ug/L 93 61-130 1,2-Dichloropropane ND 50.0 47.7 ug/L 95 68-127 Eurofins Denver Page 70 of 160 6/1/2023 QC Sample Results Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Method: 8260D - Volatile O Lab Sample ID: 280-175962-B-4 MS Matrix: Water Analysis Batch: 612565 is Compounds by GC/MS (Continued) Job ID: 280-176200-1 Client Sample ID: Matrix Spike Prep Type: Total/NA Analyte Sample Sample Result Qualifier Spike Added MS MS Result Qualifier Unit D %Rec %Rec Limits 1,4-Dioxane ND 1000 807 ug/L 81 59-134 Ethylbenzene ND 50.0 45.5 ug/L 91 76-121 Ethylene Dibromide ND 50.0 48.2 ug/L 96 81 -118 Trichlorofluoromethane ND 50.0 54.9 ug/L 110 57-144 MS MS Surrogate %Recovery Qualifier Limits 1,2-Dichloroethane-d4 (Surr) 103 70- 127 Toluene-d8 (Surr) 96 80- 125 4-Bromofluorobenzene (Surr) 100 78- 120 IM Dibromofluoromethane (Surr) 101 77- 120 Lab Sample ID: 280-175962-C-4 MSD Client Sample ID: Matrix Spike Duplicate Matrix: Water Prep Type: Total/NA Analysis Batch: 612565 Sample Sample Spike MSD MSD %Rec RPD Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits RPD Limit Acetone ND 200 175 ug/L 87 50-137 1 21 2-Butanone(MEK) ND 200 171 ug/L 86 53-135 3 20 Benzene ND 50.0 44.8 ug/L 90 69-126 1 20 Chlorobenzene ND 50.0 43.1 ug/L 86 78-118 1 20 Carbon disulfide ND 50.0 42.1 ug/L 84 56 -128 0 20 Carbon tetrachloride ND 50.0 50.2 ug/L 100 60 -133 2 20 Cyclohexane ND 50.0 50.4 ug/L 101 57-134 1 32 1,2-Dibromo-3-Chloropropane ND 50.0 44.0 ug/L 88 58-122 10 21 Bromomethane ND 50.0 30.3 ug/L 61 25 -163 9 40 Bromoform ND 50.0 49.9 ug/L 100 57 -125 3 20 Chloroethane ND 50.0 48.4 ug/L 97 52 -144 1 30 Chloroform ND 50.0 46.5 ug/L 93 68-128 1 20 Chlorobromomethane ND 50.0 51.8 ug/L 104 71 -130 0 20 Dichlorobromomethane ND 50.0 51.6 ug/L 103 67-126 0 20 Chlorodibromomethane ND 50.0 48.1 ug/L 96 71 - 122 3 20 Isopropylbenzene ND 50.0 45.6 ug/L 91 70 -127 1 20 2-Hexanone ND 200 167 ug/L 84 58-134 0 21 Chloromethane ND 50.0 43.3 ug/L 87 43-142 0 20 Dichlorodifluoromethane ND 50.0 52.2 ug/L 104 26-152 1 21 trans- 1,2-Dichloroethene ND 50.0 43.0 ug/L 86 66 -129 2 20 trans-1,3-Dichloropropene ND 50.0 48.7 ug/L 97 66-127 2 20 Methylene Chloride ND 50.0 44.9 ug/L 90 64 -128 3 20 Methyl acetate ND 100 90.8 ug/L 91 59 -133 5 20 Methyl tent -butyl ether ND 50.0 45.9 ug/L 92 70 -127 0 20 4-Methyl-2-pentanone (MIBK) ND 200 175 ug/L 87 56 -135 0 20 Methylcyclohexane ND 50.0 51.7 ug/L 103 58-136 0 21 Styrene ND 50.0 49.5 ug/L 99 79-120 1 20 1,1,2,2-Tetrachloroethane ND 50.0 48.3 ug/L 97 72-122 1 20 1,2,3-Trichlorobenzene ND 50.0 39.4 ug/L 79 70-127 11 20 1,2,4-Trichlorobenzene ND 50.0 46.5 ug/L 93 73- 124 5 20 Toluene ND 50.0 45.2 ug/L 90 68 -127 1 20 1,1,1-Trichloroethane ND 50.0 47.4 ug/L 95 62-132 1 20 Eurofins Denver Page 71 of 160 6/1/2023 QC Sample Results Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon Method: 8260D - Volatile Organic Compounds by GC/MS (Continued) Lab Sample ID: 280-175962-C-4 MSD Client Sample ID: Matrix Spike Duplicate Matrix: Water Prep Type: Total/NA Analysis Batch: 612565 Sample Sample Spike MSD MSD %Rec RPD Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits RPD Limit 1,1,2-Tdchloroethane ND 50.0 49.9 ug/L 100 72-128 2 20 Trichloroethene ND 50.0 44.3 ug/L 89 70-125 1 20 1,1,2-Trichloro-1,2,24rifluoroetha ND 50.0 51.0 ug/L 102 60-137 2 23 ne Vinyl chloride ND 50.0 47.5 ug/L 95 53-141 2 25 m-Xylene & p-Xylene ND 50.0 44.5 ug/L 89 76 -122 1 20 o-Xylene ND 50.0 45.0 ug/L 90 77 -120 2 20 Tetrachloroethene ND 50.0 48.6 ug/L 97 72-127 3 20 1,2-Dichlorobenzene ND 50.0 47.1 ug/L 94 77 -121 1 20 1,3-Dichlorobenzene ND 50.0 44.5 ug/L 89 76-121 1 20 m 1,4-Dichlorobenzene ND 50.0 42.0 ug/L 84 76-119 1 20 cis- 1,2-Dichloroethene ND 50.0 44.7 ug/L 89 69-126 2 20 cis-1,3-Dichloropropene ND 50.0 45.6 ug/L 91 75-120 1 20 1,1-Dichloroethane ND 50.0 44.6 ug/L 89 66-130 2 20 1,1-Dichloroethene ND 50.0 46.2 ug/L 92 62-130 0 21 1,2-Dichloroethane ND 50.0 46.1 ug/L 92 61 -130 1 20 1,2-Dichloropropane ND 50.0 46.9 ug/L 94 68-127 2 20 1,4-Dioxane ND 1000 874 ug/L 87 59-134 8 24 Ethylbenzene ND 50.0 44.7 ug/L 89 76 -121 2 20 Ethylene Dibromide ND 50.0 47.9 ug/L 96 81 -118 1 20 Trichlorofluoromethane ND 50.0 55.9 ug/L 112 57-144 2 28 MSD MSD Surrogate %Recovery Qualifier Limits 1,2-Dichloroethane-d4 (Surr) 104 70- 127 Toluene-d8 (Surr) 97 80- 125 4-Bromofluorobenzene (Surr) 101 78-120 Dibromofluoromethane (Surr) 101 77-120 Lab Sample ID: MB 280-612584/7 Client Sample ID: Method Blank Matrix: Water Prep Type: Total/NA Analysis Batch: 612584 MB MB Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Acetone ND 15 6.6 ug/L 05/15/23 21:23 1 2-Butanone (MEK) ND 15 6.0 ug/L 05/15/23 21:23 1 Benzene ND 1.0 0.31 ug/L 05/15/23 21:23 1 Chlorobenzene ND 1.0 0.42 ug/L 05/15/23 21:23 1 Carbon disulfide ND 2.0 0.63 ug/L 05/15/23 21:23 1 Carbon tetrachloride ND 1.0 0.57 ug/L 05/15/23 21:23 1 Cyclohexane ND 1.0 0.44 ug/L 05/15/23 21:23 1 1,2-Dibromo-3-Chloropropane ND 5.0 1.8 ug/L 05/15/23 21:23 1 Bromomethane ND 5.0 2.4 ug/L 05/15/23 21:23 1 Bromoform ND 2.0 1.2 ug/L 05/15/23 21:23 1 Chloroethane ND 4.0 1.4 ug/L 05/15/23 21:23 1 Chloroform ND 1.0 0.36 ug/L 05/15/23 21:23 1 Chlorobromomethane ND 1.0 0.40 ug/L 05/15/23 21:23 1 Dichlorobromomethane ND 1.0 0.39 ug/L 05/15/23 21:23 1 Chlorodibromomethane ND 2.0 0.62 ug/L 05/15/23 21:23 1 [sop ropylbenzene ND 1.0 0.36 ug/L 05/15/23 21:23 1 Eurofins Denver Page 72 of 160 6/1/2023 QC Sample Results Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon Method: 8260D - Volatile Organic Compounds by GC/MS (Continued) Lab Sample ID: MB 280-612584/7 Client Sample ID: Method Blank Matrix: Water Prep Type: Total/NA Analysis Batch: 612584 MB MB Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 2-Hexanone ND 5.0 1.7 ug/L 05/15/23 21:23 1 Chloromethane ND 2.0 0.75 ug/L 05/15/23 21:23 1 Dichlorodifluoromethane ND 3.0 0.96 ug/L 05/15/23 21:23 1 trans-1,2-Dichloroethene ND 1.0 0.37 ug/L 05/15/23 21:23 1 trans-1,3-Dichloropropene ND 2.0 0.65 ug/L 05/15/23 21:23 1 Methylene Chloride ND 2.0 0.94 ug/L 05/15/23 21:23 1 Methyl acetate ND 5.0 1.6 ug/L 05/15/23 21:23 1 Methyl tert-butyl ether ND 5.0 0.25 ug/L 05/15/23 21:23 1 4-Methyl-2-pentanone (MIBK) ND 5.0 0.98 ug/L 05/15/23 21:23 1 Methylcyclohexane ND 1.0 0.31 ug/L 05/15/23 21:23 1 Styrene ND 1.0 0.36 ug/L 05/15/23 21:23 1 1,1,2,2-Tetrachloroethane ND 1.0 0.21 ug/L 05/15/23 21:23 1 1,2,3-Trichlorobenzene ND 2.0 0.70 ug/L 05/15/23 21:23 1 1,2,4-Trichlorobenzene ND 1.0 0.58 ug/L 05/15/23 21:23 1 Toluene ND 1.0 0.32 ug/L 05/15/23 21:23 1 1,1,1-Trichloroethane ND 1.0 0.39 ug/L 05/15/23 21:23 1 1,1,2-Trichloroethane ND 1.0 0.27 ug/L 05/15/23 21:23 1 Trichloroethene ND 1.0 0.30 ug/L 05/15/23 21:23 1 1,1,2-Trichloro-1,2,2-trifluoroethane ND 3.0 0.73 ug/L 05/15/23 21:23 1 Vinyl chloride ND 2.0 0.51 ug/L 05/15/23 21:23 1 m-Xylene & p-Xylene ND 2.0 0.36 ug/L 05/15/23 21:23 1 o-Xylene ND 1.0 0.33 ug/L 05/15/23 21:23 1 Tetrachloroethene ND 1.0 0.40 ug/L 05/15/23 21:23 1 1,2-Dichlorobenzene ND 1.0 0.37 ug/L 05/15/23 21:23 1 1,3-Dichlorobenzene ND 1.0 0.33 ug/L 05/15/23 21:23 1 1,4-Dichlorobenzene ND 1.0 0.39 ug/L 05/15/23 21:23 1 cis-1,2-Dichloroethene ND 1.0 0.32 ug/L 05/15/23 21:23 1 cis-1,3-Dichloropropene ND 2.0 0.63 ug/L 05/15/23 21:23 1 1,1-Dichloroethane ND 1.0 0.22 ug/L 05/15/23 21:23 1 1,1-Dichloroethene ND 1.0 0.23 ug/L 05/15/23 21:23 1 1,2-Dichloroethane ND 1.0 0.54 ug/L 05/15/23 21:23 1 1,2-Dichloropropane ND 1.0 0.52 ug/L 05/15/23 21:23 1 1,4-Dioxane ND 150 19 ug/L 05/15/23 21:23 1 Ethylbenzene ND 1.0 0.30 ug/L 05/15/23 21:23 1 Ethylene Dibromide ND 1.0 0.40 ug/L 05/15/23 21:23 1 Trichlorofluoromethane ND 2.0 0.57 ug/L 05/15/23 21:23 1 MB MB Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 1, 2-Dichloroethane-d4 (Surr) 99 70 -127 05/15/23 21:23 1 Toluene-d8 (Surr) 101 80 -125 05/15/23 21:23 1 4-Bromofluorobenzene (Surr) 101 78 -120 05115123 21:23 1 Dibromofluoromethane (Surr) 98 77- 120 05115123 21:23 1 Eurofins Denver [13] Page 73 of 160 6/1/2023 QC Sample Results Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon Method: 8260D -Volatile Organic Compounds by GC/MS (Continued) Lab Sample ID: LCS 280-612584/1002 Client Sample ID: Lab Control Sample Matrix: Water Prep Type: Total/NA Analysis Batch: 612584 Spike LCS LCS %Rec Analyte Added Result Qualifier Unit D %Rec Limits Acetone 200 187 ug/L 93 50 -137 2-Butanone (MEK) 200 190 ug/L 95 53-135 Benzene 50.0 47.6 ug/L 95 69 -126 Chlorobenzene 50.0 49.6 ug/L 99 78-118 Carbon disulfide 50.0 46.0 ug/L 92 56 -128 Carbon tetrachloride 50.0 50.5 ug/L 101 60 -133 Cyclohexane 50.0 48.6 ug/L 97 57 -134 1,2-Dibromo-3-Chloropropane 50.0 53.2 ug/L 106 58 -122 Bromomethane 50.0 47.1 ug/L 94 25 -163 Bromoform 50.0 52.7 ug/L 105 57 -125 Chloroethane 50.0 41.3 ug/L 83 52 -144 Chloroform 50.0 48.1 ug/L 96 68 -128 Chlorobromomethane 50.0 46.4 ug/L 93 71 -130 Dichlorobromomethane 50.0 49.3 ug/L 99 67 -126 Chlorodibromomethane 50.0 52.1 ug/L 104 71 -122 Isopropylbenzene 50.0 53.8 ug/L 108 70-127 2-Hexanone 200 212 ug/L 106 58-134 Chloromethane 50.0 41.6 ug/L 83 43 -142 Dichlorodifluoromethane 50.0 35.4 ug/L 71 26-152 trans-1,2-Dichloroethene 50.0 46.0 ug/L 92 66 -129 trans-1,3-Dichloropropene 50.0 50.5 ug/L 101 66 -127 Methylene Chloride 50.0 47.1 ug/L 94 64 -128 Methyl acetate 100 95.1 ug/L 95 59 -133 Methyl tert-butyl ether 50.0 49.0 ug/L 98 70 -127 4-Methyl-2-pentanone (MIBK) 200 206 ug/L 103 56 -135 Methylcyclohexane 50.0 47.9 ug/L 96 58-136 Styrene 50.0 50.7 ug/L 101 79 -120 1,1,2,2-Tetrachloroethane 50.0 50.0 ug/L 100 72-122 1,2,3-Trichlorobenzene 50.0 49.7 ug/L 99 70 -127 1,2,4-Trichlorobenzene 50.0 50.5 ug/L 101 73 -124 Toluene 50.0 47.7 ug/L 95 68 -127 1,1,1-Trichloroethane 50.0 48.9 ug/L 98 62-132 1,1,2-Trichloroethane 50.0 49.6 ug/L 99 72-128 Trichloroethene 50.0 47.0 ug/L 94 70 -125 1,1,2-Trichloro-1,2,2-trifluoroetha 50.0 50.2 ug/L 100 60-137 ne Vinyl chloride 50.0 41.8 ug/L 84 53 -141 m-Xylene & p-Xylene 50.0 51.1 ug/L 102 76 -122 o-Xylene 50.0 50.1 ug/L 100 77 -120 Tetrachloroethene 50.0 49.4 ug/L 99 72 -127 1,2-Dichlorobenzene 50.0 53.9 ug/L 108 77-121 1,3-Dichlorobenzene 50.0 54.5 ug/L 109 76-121 1,4-Dichlorobenzene 50.0 49.8 ug/L 100 76 -119 cis-1,2-Dichloroethene 50.0 48.5 ug/L 97 69 -126 cis-1,3-Dichloropropene 50.0 48.8 ug/L 98 75 -120 1,1-Dichloroethane 50.0 47.8 ug/L 96 66-130 1,1-Dichloroethene 50.0 48.2 ug/L 96 62-130 1,2-Dichloroethane 50.0 45.2 ug/L 90 61 -130 1,2-Dichloropropane 50.0 47.3 ug/L 95 68-127 Eurofins Denver Page 74 of 160 6/1/2023 QC Sample Results Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon Method: 8260D - Volatile Organic Compounds by GC/MS (Continued) Lab Sample ID: LCS 280-612584/1002 Client Sample ID: Lab Control Sample Matrix: Water Prep Type: Total/NA Analysis Batch: 612584 Spike LCS LCS %Rec Analyte Added Result Qualifier Unit D %Rec Limits 1,4-Dioxane 1000 1050 ug/L 105 59 -134 Ethylbenzene 50.0 49.5 ug/L 99 76 -121 Ethylene Dibromide 50.0 48.6 ug/L 97 81 -118 Trichlorofluoromethane 50.0 43.4 ug/L 87 57-144 LCS LCS Surrogate %Recovery Qualifier Limits 1,2-Dichloroethane-d4 (Surr) 99 70- 127 Toluene-d8 (Surr) 102 80- 125 4-Bromofluorobenzene (Surr) 104 78 - 120 m Dibromofluoromethane (Surr) 100 77- 120 Lab Sample ID: LCSD 280-612584/4 Client Sample ID: Lab Control Sample Dup Matrix: Water Prep Type: Total/NA Analysis Batch: 612584 Spike LCSD LCSD %Rec RPD Analyte Added Result Qualifier Unit D %Rec Limits RPD Limit Acetone 200 188 ug/L 94 50 -137 0 21 i 2-Butanone (MEK) 200 189 ug/L 95 53-135 0 20 Benzene 50.0 47.3 ug/L 95 69 -126 1 20 Chlorobenzene 50.0 48.3 ug/L 97 78 -118 3 20 Carbon disulfide 50.0 46.9 ug/L 94 56-128 2 20 Carbon tetrachloride 50.0 51.7 ug/L 103 60 -133 2 20 Cyclohexane 50.0 49.8 ug/L 100 57 -134 3 32 1,2-Dibromo-3-Chloropropane 50.0 54.6 ug/L 109 58 -122 2 21 Bromomethane 50.0 48.1 ug/L 96 25-163 2 40 1 Bromoform 50.0 51.5 ug/L 103 57 -125 2 20 Chloroethane 50.0 42.5 ug/L 85 52 -144 3 30 Chloroform 50.0 48.1 ug/L 96 68-128 0 20 Chlorobromomethane 50.0 46.8 ug/L 94 71 -130 1 20 Dichlorobromomethane 50.0 49.5 ug/L 99 67-126 0 20 Chlorodibromomethane 50.0 51.8 ug/L 104 71 - 122 0 20 Isopropylbenzene 50.0 54.4 ug/L 109 70 - 127 1 20 2-Hexanone 200 209 ug/L 104 58-134 2 21 Chloromethane 50.0 44.0 ug/L 88 43-142 6 20 Dichlorodifluoromethane 50.0 37.9 ug/L 76 26-152 7 21 trans-1,2-Dichloroethene 50.0 46.1 ug/L 92 66-129 0 20 trans-1,3-Dichloropropene 50.0 49.9 ug/L 100 66-127 1 20 Methylene Chloride 50.0 47.8 ug/L 96 64 -128 1 20 Methyl acetate 100 95.7 ug/L 96 59 -133 1 20 Methyl tert-butyl ether 50.0 49.1 ug/L 98 70 -127 0 20 4-Methyl-2-pentanone (MIBK) 200 205 ug/L 102 56 -135 1 20 Methylcyclohexane 50.0 48.1 ug/L 96 58-136 0 21 Styrene 50.0 50.5 ug/L 101 79 -120 1 20 1,1,2,2-Tetrachloroethane 50.0 50.4 ug/L 101 72-122 1 20 1,2,3-Trichlorobenzene 50.0 51.5 ug/L 103 70-127 4 20 1,2,4-Trichlorobenzene 50.0 51.7 ug/L 103 73-124 2 20 Toluene 50.0 47.2 ug/L 94 68 -127 1 20 1,1,1-Trichloroethane 50.0 50.3 ug/L 101 62-132 3 20 Eurofins Denver Page 75 of 160 6/1/2023 QC Sample Results Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Method: 8260D - Volatile Organic Com Lab Sample ID: LCSD 280-612584/4 Matrix: Water Analysis Batch: 612584 Job ID: 280-176200-1 nds by GC/MS (Continued) Client Sample ID: Lab Control Sample Dup Prep Type: Total/NA Spike LCSD LCSD %Rec RPD Analyte Added Result Qualifier Unit D %Rec Limits RPD Limit 1,1,2-Trichloroethane 50.0 49.3 ug/L 99 72-128 1 20 Trichloroethene 50.0 47.0 ug/L 94 70-125 0 20 1,1,2-Trichloro-1,2,2-tdfluoroetha 50.0 50.9 ug/L 102 60-137 1 23 ne Vinyl chloride 50.0 44.1 ug/L 88 53 -141 5 25 m-Xylene & p-Xylene 50.0 50.2 ug/L 100 76 -122 2 20 o-Xylene 50.0 50.4 ug/L 101 77 -120 1 20 Tetrachloroethene 50.0 49.3 ug/L 99 72 -127 0 20 1,2-Dichlorobenzene 50.0 53.4 ug/L 107 77 -121 1 20 1,3-Dichlorobenzene 50.0 54.5 ug/L 109 76-121 0 20 m 1,4-Dichlorobenzene 50.0 48.9 ug/L 98 76 -119 2 20 cis- 1,2-Dichloroethene 50.0 48.7 ug/L 97 69-126 0 20 cis-1,3-Dichloropropene 50.0 48.1 ug/L 96 75 -120 1 20 1,1-Dichloroethane 50.0 47.7 ug/L 95 66-130 0 20 1,1-Dichloroethene 50.0 48.9 ug/L 98 62-130 1 21 1,2-Dichloroethane 50.0 45.0 ug/L 90 61 -130 1 20 1,2-Dichloropropane 50.0 46.7 ug/L 93 68-127 1 20 1,4-Dioxane 1000 1050 ug/L 105 59-134 0 24 Ethylbenzene 50.0 48.7 ug/L 97 76-121 2 20 Ethylene Dibromide 50.0 48.7 ug/L 97 81 -118 0 20 Trichlorofluoromethane 50.0 45.1 ug/L 90 57-144 4 28 LCSD LCSD Surrogate %Recovery Qualifier Limits 1,2-Dichloroethane-d4 (Surr) 98 70-127 Toluene-d8 (Surr) 100 80- 125 4-Bromofluorobenzene (Surr) 104 78-120 Dibromofluoromethane (Surr) 101 77- 120 Lab Sample ID: 280-176296-W-3 MS Matrix: Water Analysis Batch: 612584 Analyte Sample Sample Result Qualifier Acetone ND 2-Butanone (MEK) ND Benzene ND Chlorobenzene ND Carbon disulfide ND Carbon tetrachloride ND Cyclohexane ND 1,2-Dibromo-3-Chloropropane ND Bromomethane ND Bromoform ND Chloroethane ND Chloroform ND Chlorobromomethane ND Dichlorobromomethane ND Chlorodibromomethane ND Isopropylbenzene ND Client Sample ID: Matrix Spike Prep Type: Total/NA Spike Added MS MS Result Qualifier Unit D %Rec %Rec Limits 200 172 ug/L 86 50-137 200 179 ug/L 90 53 -135 50.0 40.7 ug/L 81 69 -126 50.0 41.8 ug/L 84 78 -118 50.0 37.1 ug/L 74 56 -128 50.0 41.5 ug/L 83 60 - 133 50.0 38.6 ug/L 77 57 -134 50.0 52.2 ug/L 104 58 -122 50.0 44.2 ug/L 88 25 -163 50.0 47.2 ug/L 94 57 -125 50.0 45.4 ug/L 91 52 -144 50.0 40.9 ug/L 82 68 -128 50.0 41.2 ug/L 82 71 -130 50.0 41.7 ug/L 83 67 -126 50.0 49.1 ug/L 98 71 -122 50.0 43.5 ug/L 87 70 -127 Eurofins Denver Page 76 of 160 6/1 /2023 QC Sample Results Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Method. 8260D - Volatile Organic Compounds by GC/MS (Contin Lab Sample ID: 280-176296-W-3 MS Matrix: Water Analysis Batch: 612584 Analyte 2-Hexanone Chloromethane Dichlorodifluoromethane trans- 1,2-Dichloroethene trans-1,3-Dichloropropene Methylene Chloride Methyl acetate Methyl tert-butyl ether 4-Methyl-2-pentanone (MIBK) Methylcyclohexane Styrene 1,1,2,2-Tetrachloroethane 1,2,3-Trichlorobenzene 1,2,4-Trichlorobenzene Toluene 1,1,1-Trichloroeth ane 1,1,2-Trichloroethane Trichloroethene 1,1,2-Trichloro-1,2,2-trifluoroetha ne Vinyl chloride m-Xylene & p-Xylene o-Xylene Tetrachloroethene 1,2-Dichlorobenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene cis-1,2-Dichloroethene cis-1,3-Dichloropropene 1,1-Dichloroethane 1,1-Dichloroethene 1,2-Dichloroethane 1,2-Dichloropropane 1,4-Dioxane Ethylbenzene Ethylene Dibromide Trichlorofluoromethane Surrogate 1,2-Dichloroethane-d4 (Surr) Toluene-d8 (Surr) 4-Bromofluorobenzene (Surr) Dibromofluoromethane (Surr) Job ID: 280-176200-1 Client Sample ID: Matrix Spike Prep Type: Total/NA Sample Sample Spike MS MS %Rec Result Qualifier Added Result Qualifier Unit D %Rec Limits ND 200 220 ug/L 110 58 -134 ND 50.0 41.6 ug/L 83 43-142 ND 50.0 33.3 ug/L 67 26 -152 ND 50.0 37.9 ug/L 76 66 -129 ND 50.0 42.9 ug/L 86 66-127 ND 50.0 40.3 ug/L 81 64 -128 ND 100 85.9 ug/L 86 59 -133 ND 50.0 41.5 ug/L 83 70 -127 ND 200 200 ug/L 100 56-135 ND 50.0 38.4 ug/L 77 58 -136 ND 50.0 44.1 ug/L 88 79-120 ND 50.0 46.5 ug/L 93 72 -122 ND 50.0 51.3 ug/L 103 70-127 ND 50.0 48.4 ug/L 97 73-124 ND 50.0 38.4 ug/L 77 68-127 ND 50.0 41.1 ug/L 82 62 -132 ND 50.0 44.3 ug/L 89 72-128 ND 50.0 41.8 ug/L 84 70-125 ND 50.0 39.7 ug/L 79 60-137 ND 50.0 44.5 ug/L 89 53-141 ND 50.0 42.4 ug/L 85 76-122 ND 50.0 42.4 ug/L 85 77-120 ND 50.0 43.1 ug/L 86 72-127 ND 50.0 47.5 ug/L 95 77-121 ND 50.0 46.4 ug/L 93 76 -121 ND 50.0 43.5 ug/L 87 76 -119 ND 50.0 40.3 ug/L 81 69 -126 ND 50.0 43.2 ug/L 86 75-120 ND 50.0 40.5 ug/L 81 66 -130 ND 50.0 39.9 ug/L 80 62 -130 ND 50.0 39.3 ug/L 79 61 -130 ND 50.0 40.5 ug/L 81 68-127 ND 1000 1060 ug/L 106 59-134 ND 50.0 42.1 ug/L 84 76-121 ND F1 50.0 46.2 ug/L 92 81 -118 ND 50.0 41.7 ug/L 83 57-144 MS MS %Recovery Qualifier 99 99 99 99 Limits 70-127 80 -125 78 - 120 77- 120 Eurofins Denver Page 77 of 160 6/1 /2023 QC Sample Results Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Method: 8260D - Volatile Organic Compounds by GC/MS (Continued Lab Sample ID: 280-176296-W-3 MSD Matrix: Water Analysis Batch: 612584 Sample Sample Analyte Result Qualifier Acetone ND 2-Butanone (MEK) ND Benzene ND Chlorobenzene ND Carbon disulfide ND Carbon tetrachloride ND Cyclohexane ND 1 1,2-Dibromo-3-Chloropropane ND Bromomethane ND Bromoform ND Chloroethane ND Chloroform ND Chlorobromomethane ND Dichlorobromomethane ND Chlorodibromomethane ND Isopropylbenzene ND 2-Hexanone ND Chloromethane ND Dichlorodifluoromethane ND trans-1,2-Dichloroethene ND trans-1,3-Dichloropropene ND Methylene Chloride ND Methyl acetate ND Methyl tert-butyl ether ND 4-Methyl-2-pentanone (MIBK) ND Methylcyclohexane ND Styrene ND 1,1,2,2-Tetrachloroethane ND 1,2,3-Trichlorobenzene ND 1,2,4-Trichlorobenzene ND Toluene ND 1,1,1-Trichloroethane ND 1,1,2-Trichloroethane ND Trichloroethene ND 1,1,2-Trichloro-1,2,2-trifluoroetha ND ne Vinyl chloride ND m-Xylene & p-Xylene ND o-Xylene ND Tetrachloroethene ND 1,2-Dichlorobenzene ND 1,3-Dichlorobenzene ND 1,4-Dichlorobenzene ND cis- 1,2-Dichloroethene ND cis- 1,3-Dichloropropene ND 1,1-Dichloroethane ND 1,1-Dichloroethene ND 1,2-Dichloroethane ND 1,2-Dichloropropane ND Job ID: 280-176200-1 Client Sample ID: Matrix Spike Duplicate Prep Type: Total/NA Spike MSD MSD %Rec RPD Added Result Qualifier Unit D %Rec Limits RPD Limit 200 175 ug/L 88 50 -137 2 21 200 184 ug/L 92 53-135 2 20 50.0 40.8 ug/L 82 69 -126 0 20 50.0 41.2 ug/L 82 78 -118 1 20 50.0 37.8 ug/L 76 56 -128 2 20 50.0 42.3 ug/L 85 60 -133 2 20 50.0 39.4 ug/L 79 57 -134 2 32 50.0 55.1 ug/L 110 58 -122 5 21 50.0 44.2 ug/L 88 25 -163 0 40 m 50.0 45.2 ug/L 90 57 -125 4 20 50.0 44.3 ug/L 89 52 -144 3 30 50.0 41.3 ug/L 83 68 -128 1 20 50.0 41.3 ug/L 83 71 -130 0 20 50.0 39.7 ug/L 79 67 -126 5 20 50.0 44.5 ug/L 89 71 -122 10 20 50.0 44.3 ug/L 89 70 -127 2 20 200 214 ug/L 107 58 -134 3 21 50.0 42.5 ug/L 85 43 -142 2 20 50.0 35.6 ug/L 71 26 -152 7 21 50.0 38.3 ug/L 77 66 -129 1 20 50.0 39.7 ug/L 79 66 -127 8 20 50.0 40.2 ug/L 80 64 -128 0 20 100 84.8 ug/L 85 59 -133 1 20 50.0 42.0 ug/L 84 70 -127 1 20 200 198 ug/L 99 56 -135 1 20 50.0 38.7 ug/L 77 58 -136 1 21 50.0 43.4 ug/L 87 79 -120 1 20 50.0 47.2 ug/L 94 72 - 122 2 20 50.0 52.1 ug/L 104 70 -127 2 20 50.0 49.7 ug/L 99 73 -124 3 20 50.0 38.1 ug/L 76 68 -127 1 20 50.0 41.9 ug/L 84 62 -132 2 20 50.0 42.7 ug/L 85 72 -128 4 20 50.0 41.3 ug/L 83 70 -125 1 20 50.0 40.6 ug/L 81 60 - 137 2 23 50.0 46.1 ug/L 92 53 -141 3 25 50.0 41.6 ug/L 83 76 -122 2 20 50.0 42.3 ug/L 85 77 -120 0 20 50.0 41.2 ug/L 82 72 -127 5 20 50.0 47.9 ug/L 96 77 -121 1 20 50.0 46.9 ug/L 94 76 -121 1 20 50.0 44.0 ug/L 88 76 -119 1 20 50.0 40.7 ug/L 81 69 -126 1 20 50.0 39.2 ug/L 78 75 -120 10 20 50.0 40.5 ug/L 81 66 -130 0 20 50.0 40.5 ug/L 81 62 -130 2 21 50.0 38.9 ug/L 78 61 -130 1 20 50.0 41.1 ug/L 82 68 -127 1 20 Eurofins Denver Page 78 of 160 6/ 1 /2023 QC Sample Results Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon Method: 8260D - Volatile Organic Compounds by GC/MS (Continued) Lab Sample ID: 280-176296-W-3 MSD Client Sample ID: Matrix Spike Duplicate Matrix: Water Prep Type: Total/NA Analysis Batch: 612584 Sample Sample Spike MSD MSD %Rec RPD Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits RPD Limit 1,4-Dioxane ND 1000 1080 ug/L 108 59 -134 2 24 Ethylbenzene ND 50.0 41.6 ug/L 83 76-121 1 20 Ethylene Dibromide ND F1 50.0 40.2 F1 ug/L 80 81 -118 14 20 Trichlorofluoromethane ND 50.0 41.6 ug/L 83 57-144 0 28 MSD MSD Surrogate %Recovery Qualifier Limits 1,2-Dichloroethane-d4 (Surr) 98 70- 127 Toluene-d8 (Surr) 98 80- 125 4-Bromofluorobenzene (Surr) 100 78- 120 m Dibromofluoromethane (Surr) 97 77- 120 Lab Sample ID: MB 280-612868/7 Matrix: Water Analysis Batch: 612868 Analyte MB MB Result Qualifier RL MDL Unit Client Sample ID: Method Blank Prep Type: Total/NA D Prepared Analyzed Dil Fac Acetone ND 15 6.6 ug/L 05/17/23 19:09 1 2-Butanone (MEK) ND 15 6.0 ug/L 05/17/23 19:09 1 Benzene ND 1.0 0.31 ug/L 05/17/23 19:09 1 Chlorobenzene ND 1.0 0.42 ug/L 05/17/23 19:09 1 Carbon disulfide ND 2.0 0.63 ug/L 05/17/23 19:09 1 Carbon tetrachloride ND 1.0 0.57 ug/L 05/17/23 19:09 1 Cyclohexane ND 1.0 0.44 ug/L 05/17/23 19:09 1 1,2-Dibromo-3-Chloropropane ND 5.0 1.8 ug/L 05/17/23 19:09 1 Bromomethane ND 5.0 2.4 ug/L 05/17/23 19:09 1 Bromoform ND 2.0 1.2 ug/L 05/17/23 19:09 1 Chloroethane ND 4.0 1.4 ug/L 05/17/23 19:09 1 Chloroform ND 1.0 0.36 ug/L 05/17/23 19:09 1 Chlorobromomethane ND 1.0 0.40 ug/L 05/17/23 19:09 1 Dichlorobromomethane ND 1.0 0.39 ug/L 05/17/23 19:09 1 Chlorodibromomethane ND 2.0 0.62 ug/L 05/17/23 19:09 1 Isopropylbenzene ND 1.0 0.36 ug/L 05/17/23 19:09 1 2-Hexanone ND 5.0 1.7 ug/L 05/17/23 19:09 1 Chloromethane ND 2.0 0.75 ug/L 05/17/23 19:09 1 Dichlorodifluoromethane ND 3.0 0.96 ug/L 05/17/23 19:09 1 trans-1,2-Dichloroethene ND 1.0 0.37 ug/L 05/17/23 19:09 1 trans-1,3-Dichloropropene ND 2.0 0.65 ug/L 05/17/23 19:09 1 Methylene Chloride ND 2.0 0.94 ug/L 05/17/23 19:09 1 Methyl acetate ND 5.0 1.6 ug/L 05/17/23 19:09 1 Methyl tert-butyl ether ND 5.0 0.25 ug/L 05/17/23 19:09 1 4-Methyl-2-pentanone (MIBK) ND 5.0 0.98 ug/L 05/17/23 19:09 1 Methylcyclohexane ND 1.0 0.31 ug/L 05/17/23 19:09 1 Styrene ND 1.0 0.36 ug/L 05/17/23 19:09 1 1,1,2,2-Tetrachloroethane ND 1.0 0.21 ug/L 05/17/23 19:09 1 1,2,3-Trichlorobenzene ND 2.0 0.70 ug/L 05/17/23 19:09 1 1,2,4-Trichlorobenzene ND 1.0 0.58 ug/L 05/17/23 19:09 1 Toluene ND 1.0 0.32 ug/L 05/17/23 19:09 1 1,1,1-Trichloroethane ND 1.0 0.39 ug/L 05/17/23 19:09 1 Eurofins Denver Page 79 of 160 6/1/2023 QC Sample Results Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Method: 8260D - Volatile Organic Compounds by GC/MS (Continued) Job ID: 280-176200-1 Lab Sample ID: MB 280-612868/7 Client Sample ID: Method Blank Matrix: Water Prep Type: Total/NA Analysis Batch: 612868 MB MB Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 1,1,2-Trichloroethane ND 1.0 0.27 ug/L 05/17/23 19:09 1 Trichloroethene ND 1.0 0.30 ug/L 05/17/23 19:09 1 1,1,2-Trichloro-1,2,2-trifluoroethane ND 3.0 0.73 ug/L 05/17/23 19:09 1 Vinyl chloride ND 2.0 0.51 ug/L 05/17/23 19:09 1 m-Xylene & p-Xylene ND 2.0 0.36 ug/L 05/17/23 19:09 1 o-Xylene ND 1.0 0.33 ug/L 05/17/23 19:09 1 Tetrachloroethene ND 1.0 0.40 ug/L 05/17/23 19:09 1 1,2-Dichlorobenzene ND 1.0 0.37 ug/L 05/17/23 19:09 1 1,3-Dichlorobenzene ND 1.0 0.33 ug/L 05/17/23 19:09 1 1,4-Dichlorobenzene ND 1.0 0.39 ug/L 05/17/23 19:09 1 cis-1,2-Dichloroethene ND 1.0 0.32 ug/L 05/17/23 19:09 1 cis- 1,3-Dichloropropene ND 2.0 0.63 ug/L 05/17/23 19:09 1 1,1-Dichloroethane ND 1.0 0.22 ug/L 05/17/23 19:09 1 1,1-Dichloroethene ND 1.0 0.23 ug/L 05/17/23 19:09 1 1,2-Dichloroethane ND 1.0 0.54 ug/L 05/17/23 19:09 1 1,2-Dichloropropane ND 1.0 0.52 ug/L 05/17/23 19:09 1 1,4-Dioxane ND 150 19 ug/L 05/17/23 19:09 1 Ethylbenzene ND 1.0 0.30 ug/L 05/17/23 19:09 1 Ethylene Dibromide ND 1.0 0.40 ug/L 05/17/23 19:09 1 Trichlorofluoromethane ND 2.0 0.57 ug/L 05/17/23 19:09 1 MB MB Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 1,2-Dichloroethane-d4 (Surr) 102 70- 127 05117123 19:09 1 Toluene-d8 (Surr) 103 80- 125 05117123 19:09 1 4-Bromofluorobenzene (Surr) 101 78- 120 05/17/23 19:09 1 Dibromofluoromethane (Surr) 98 77-120 05117123 19:09 1 Lab Sample ID: LCS 280-612868/1002 Matrix: Water Analysis Batch: 612868 Client Sample ID: Lab Control Sample Prep Type: Total/NA Analyte Spike Added LCS LCS Result Qualifier Unit D %Rec %Rec Limits Acetone 200 199 ug/L 99 50 -137 2-Butanone (MEK) 200 205 ug/L 103 53 -135 Benzene 50.0 49.4 ug/L 99 69 - 126 Chlorobenzene 50.0 51.3 ug/L 103 78-118 Carbon disulfide 50.0 47.2 ug/L 94 56 -128 Carbon tetrachloride 50.0 49.5 ug/L 99 60 -133 Cyclohexane 50.0 44.0 ug/L 88 57 -134 1,2-Dibromo-3-Chloropropane 50.0 53.2 ug/L 106 58-122 Bromomethane 50.0 47.6 ug/L 95 25-163 Bromoform 50.0 55.7 ug/L 111 57-125 Chloroethane 50.0 48.9 ug/L 98 52 -144 Chloroform 50.0 50.1 ug/L 100 68 -128 Chlorobromomethane 50.0 48.1 ug/L 96 71 -130 Dichlorobromomethane 50.0 51.4 ug/L 103 67-126 Chlorodibromomethane 50.0 53.8 ug/L 108 71 -122 Isopropylbenzene 50.0 52.2 ug/L 104 70-127 Eurofins Denver *01 Page 80 of 160 6/1/2023 QC Sample Results Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Method: 8260D - Volatile Organic Compounds by GC/MS (Continued) Lab Sample ID: LCS 280-612868/1002 Matrix: Water Analysis Batch: 612868 Analyte 2-Hexanone Chloromethane Dichlorodifluoromethane trans-1,2-Dichloroethene trans-1,3-Dichloropropene Methylene Chloride Methyl acetate Methyl tert-butyl ether 14-Methyl-2-pentanone (MIBK) Methylcyclohexane Styrene 1,1,2,2-Tetrachloroethane 1,2,3-Trichlorobenzene 1,2,4-Trichlorobenzene Toluene 1,1,1-Trichloroethane 1,1,2-Trichloroethane Trichloroethene 1,1,2-Trichloro-1,2,2-trifluoroetha ne Vinyl chloride m-Xylene & p-Xylene o-Xylene Tetrachloroethene 1,2-Dichlorobenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene cis- 1,2-Dichloroethene cis-1,3-Dichloropropene 1,1-Dichloroethane 1,1-Dichloroethene 1,2-Dichloroethane 1,2-Dichloropropane 1,4-Dioxane Ethylbenzene Ethylene Dibromide Trichlorofluoromethane LCS LCS Surrogate %Recovery Qualifier 1,2-Dichloroethane-d4 (Surr) 99 Toluene-d8 (Surr) 104 4-Bromofluorobenzene (Surr) 101 Dibromofluoromethane (Surr) 97 Job ID: 280-176200-1 Client Sample ID: Lab Control Sample Prep Type: Total/NA Spike LCS LCS %Rec Added Result Qualifier Unit D %Rec Limits 200 231 ug/L 115 58 -134 50.0 50.0 ug/L 100 43 -142 50.0 46.5 ug/L 93 26 -152 50.0 48.8 ug/L 98 66 -129 50.0 52.5 ug/L 105 66 -127 50.0 49.5 ug/L 99 64 -128 100 105 ug/L 105 59-133 50.0 52.2 ug/L 104 70 -127 200 223 ug/L 111 56-135 50.0 43.8 ug/L 88 58 -136 50.0 54.4 ug/L 109 79 -120 50.0 53.9 ug/L 108 72 -122 50.0 53.1 ug/L 106 70 -127 50.0 49.7 ug/L 99 73 -124 50.0 48.9 ug/L 98 68 -127 50.0 49.1 ug/L 98 62 -132 50.0 52.2 ug/L 104 72 -128 50.0 52.3 ug/L 105 70 -125 50.0 41.7 ug/L 83 60 -137 50.0 50.6 ug/L 101 53 -141 50.0 50.8 ug/L 102 76 -122 50.0 50.7 ug/L 101 77 -120 50.0 52.7 ug/L 105 72 -127 50.0 52.0 ug/L 104 77 -121 50.0 52.1 ug/L 104 76 -121 50.0 51.3 ug/L 103 76 -119 50.0 49.4 ug/L 99 69 -126 50.0 54.9 ug/L 110 75 -120 50.0 49.1 ug/L 98 66 -130 50.0 47.4 ug/L 95 62 - 130 50.0 48.9 ug/L 98 61 -130 50.0 50.2 ug/L 100 68 -127 1000 1010 ug/L 101 59-134 50.0 52.1 ug/L 104 76-121 50.0 53.6 ug/L 107 81 -118 50.0 45.8 ug/L 92 57 -144 Limits 70- 127 80 - 125 78 -120 77-120 Eurofins Denver Page 81 of 160 6/1 /2023 QC Sample Results Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon Method: 8260D - Volatile Organic Compounds by GUMS (Continued) Lab Sample ID: LCSD 280-612868/4 Client Sample ID: Lab Control Sample Dup Matrix: Water Prep Type: Total/NA Analysis Batch: 612868 Spike LCSD LCSD %Rec RPD Analyte Added Result Qualifier Unit D %Rec Limits RPD Limit Acetone. 200 190 ug/L 95 50-137 4 21 2-Butanone (MEK) 200 196 ug/L 98 53-135 4 20 Benzene 50.0 49.7 ug/L 99 69 -126 1 20 Chlorobenzene 50.0 50.7 ug/L 101 78-118 1 20 Carbon disulfide 50.0 46.2 ug/L 92 56 -128 2 20 Carbon tetrachloride 50.0 49.1 ug/L 98 60 -133 1 20 Cyclohexane 50.0 46.6 ug/L 93 57 -134 6 32 1,2-Dibromo-3-Chloropropane 50.0 53.5 ug/L 107 58-122 1 21 Bromomethane 50.0 54.2 ug/L 108 25-163 13 40 Bromoform 50.0 54.9 ug/L 110 57-125 1 20 m Chloroethane 50.0 50.5 ug/L 101 52 -144 3 30 Chloroform 50.0 50.7 ug/L 101 68 - 128 1 20 Chlorobromomethane 50.0 51.4 ug/L 103 71 -130 7 20 Dichlorobromomethane 50.0 53.0 ug/L 106 67-126 3 20 Chlorodibromomethane 50.0 54.8 ug/L 110 71 -122 2 20 Isopropyl benzene 50.0 52.1 ug/L 104 70 -127 0 20 2-Hexanone 200 223 ug/L 112 58-134 3 21 Chloromethane 50.0 53.3 ug/L 107 43-142 6 20 Dichlorodif! uoromethane 50.0 51.8 ug/L 104 26-152 11 21 trans-1,2-Dichloroethene 50.0 47.9 ug/L 96 66 -129 2 20 trans-1,3-Dichloropropene 50.0 53.8 ug/L 108 66-127 3 20 Methylene Chloride 50.0 50.7 ug/L 101 64 -128 2 20 Methyl acetate 100 102 ug/L 102 59 -133 3 20 Methyl tert-butyl ether 50.0 51.8 ug/L 104 70 -127 1 20 4-Methyl-2-pentanone (MIBK) 200 217 ug/L 108 56 -135 3 20 Methylcyclohexane 50.0 46.9 ug/L 94 58 -136 7 21 Styrene 50.0 54.5 ug/L 109 79 -120 0 20 1,1,2,2-Tetrachloroethane 50.0 54.3 ug/L 109 72-122 1 20 1,2,3-Trichlorobenzene 50.0 54.5 ug/L 109 70 -127 3 20 1,2,4-Trichlorobenzene 50.0 52.2 ug/L 104 73 -124 5 20 Toluene 50.0 48.6 ug/L 97 68 -127 1 20 1,1,1-Trichloroethane 50.0 48.1 ug/L 96 62-132 2 20 1,1,2-Trichloroethane 50.0 53.5 ug/L 107 72-128 2 20 Trichloroethene 50.0 49.3 ug/L 99 70 -125 6 20 1,1,2-Trichloro-1,2,2-trifluoroetha 50.0 45.9 ug/L 92 60-137 10 23 ne Vinyl chloride 50.0 53.1 ug/L 106 53 -141 5 25 m-Xylene & p-Xylene 50.0 50.7 ug/L 101 76 -122 0 20 o-Xylene 50.0 50.9 ug/L 102 77 -120 0 20 Tetrachloroethene 50.0 50.2 ug/L 100 72-127 5 20 1,2-Dichlorobenzene 50.0 52.9 ug/L 106 77 -121 2 20 1,3-Dichlorobenzene 50.0 52.8 ug/L 106 76-121 1 20 1,4-Dichlorobenzene 50.0 53.1 ug/L 106 76-119 3 20 cis- 1,2-Dichloroethene 50.0 50.1 ug/L 100 69-126 1 20 cis- 1,3-Dichloropropene 50.0 55.8 ug/L 112 75-120 2 20 1,1-Dichloroethane 50.0 48.6 ug/L 97 66-130 1 20 1,1-Dichloroethene 50.0 46.8 ug/L 94 62-130 1 21 1,2-Dichloroethane 50.0 50.3 ug/L 101 61 -130 3 20 1,2-Dichloropropane 50.0 50.4 ug/L 101 68 -127 1 20 Eurofins Denver Page 82 of 160 6/1/2023 QC Sample Results Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon Method: 8260D - Volatile Organic Compounds by GC/MS (Continued) Lab Sample ID: LCSD 280-612868/4 Client Sample ID: Lab Control Sample Dup Matrix: Water Prep Type: Total/NA Analysis Batch: 612868 Spike LCSD LCSD %Rec RPD Analyte Added Result Qualifier Unit D %Rec Limits RPD Limit 1,4-Dioxane 1000 1000 ug/L 100 59 -134 1 24 Ethylbenzene 50.0 51.0 ug/L 102 76-121 2 20 Ethylene Dibromide 50.0 53.9 ug/L 108 81 -118 1 20 Trichlorofluoromethane 50.0 49.8 ug/L 100 57-144 8 28 LCSD LCSD Surrogate %Recovery Qualifier Limits 1,2-Dichloroethane-d4 (Surr) 99 70- 127 Toluene-d8 (Surr) 104 80- 125 4-Bromofluorobenzene (Surr) 102 78- 120 IE Dibromofluoromethane (Surr) 98 77- 120 Lab Sample ID: 240-184832-D-31 MS Matrix: Water Analysis Batch: 612868 Client Sample ID: Matrix Spike Prep Type: Total/NA Analyte Sample Sample Result Qualifier Spike Added MS MS Result Qualifier Unit D %Rec %Rec Limits Acetone ND 200 183 ug/L 92 50 -137 2-Butanone (MEK) ND 200 193 ug/L 96 53 -135 Benzene 13 50.0 62.5 ug/L 99 69 -126 Chlorobenzene ND 50.0 52.4 ug/L 105 78-118 Carbon disulfide ND 50.0 48.2 ug/L 96 56 -128 Carbon tetrachloride ND 50.0 49.5 ug/L 99 60 -133 Cyclohexane ND 50.0 47.4 ug/L 95 57-134 1,2-Dibromo-3-Chloropropane ND 50.0 46.4 ug/L 93 58 -122 Bromomethane ND 50.0 31.4 ug/L 63 25-163 Bromoform ND 50.0 54.2 ug/L 108 57 -125 Chloroethane ND 50.0 42.4 ug/L 85 52 -144 Chloroform ND 50.0 51.1 ug/L 102 68-128 Chlorobromomethane ND 50.0 51.4 ug/L 103 71 -130 Dichlorobromomethane ND 50.0 51.7 ug/L 103 67 -126 Chlorodibromomethane ND 50.0 54.0 ug/L 108 71 - 122 Isop ropylbenzene ND 50.0 53.3 ug/L 107 70-127 2-Hexanone ND 200 223 ug/L ill 58 - 134 Chloromethane ND 50.0 44.7 ug/L 89 43 - 142 Dichlorodifluoromethane ND 50.0 36.5 ug/L 73 26 -152 trans-1,2-Dichloroethene ND 50.0 49.8 ug/L 100 66-129 trans-1,3-Dichloropropene ND 50.0 52.0 ug/L 104 66-127 Methylene Chloride 1.0 J 50.0 50.9 ug/L 100 64 -128 Methyl acetate ND 100 96.0 ug/L 96 59 -133 Methyl tert-butyl ether ND 50.0 51.8 ug/L 104 70 -127 4-Methyl-2-pentanone (MIBK) ND 200 211 ug/L 106 56-135 Methylcyclohexane ND 50.0 46.6 ug/L 93 58-136 Styrene ND 50.0 55.5 ug/L 111 79 -120 1,1,2,2-Tetrachloroethane ND 50.0 54.2 ug/L 108 72-122 1,2,3-Trichlorobenzene ND F2 50.0 42.5 ug/L 85 70-127 1,2,4-Trichlorobenzene ND 50.0 47.3 ug/L 95 73-124 Toluene ND 50.0 49.3 ug/L 99 68 -127 1,1,1-Trichloroethane ND 50.0 48.7 ug/L 97 62-132 Eurofins Denver Page 83 of 160 6/1/2023 QC Sample Results Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Job ID: 280-176200-1 Method: 8260D - Volatile Organic Compounds by GC/MS (Continued) Lab Sample ID: 240-184832-D-31 MS Client Sample ID: Matrix Spike Matrix: Water Prep Type: Total/NA Analysis Batch: 612868 Sample Sample Spike MS MS %Rec Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits 1,1,2-Trichloroethane ND 50.0 52.0 ug/L 104 72-128 Trichloroethene ND 50.0 51.9 ug/L 104 70 -125 1,1,2-Trichloro-1,2,2-trifluoroetha ND 50.0 45.6 ug/L 91 60-137 ne Vinyl chloride ND 50.0 43.4 ug/L 87 53 -141 m-Xylene & p-Xylene ND 50.0 52.4 ug/L 105 76 -122 o-Xylene ND 50.0 51.9 ug/L 104 77-120 Tetrachloroethene ND 50.0 52.4 ug/L 105 72 -127 1,2-Dichlorobenzene ND 50.0 52.1 ug/L 104 77-121 1,3-Dichlorobenzene ND 50.0 53.0 ug/L 106 76-121 1,4-Dichlorobenzene ND 50.0 53.5 ug/L 107 76-119 cis- 1,2-Dichloroethene ND 50.0 51.1 ug/L 102 69-126 cis-1,3-Dichloropropene ND 50.0 55.2 ug/L 110 75-120 1,1-Dichloroethane 0.62 J 50.0 50.7 ug/L 100 66-130 1,1-Dichloroethene ND 50.0 48.4 ug/L 97 62-130 1,2-Dichloroethane ND 50.0 50.3 ug/L 101 61 -130 1,2-Dichloropropane ND 50.0 51.0 ug/L 102 68 -127 1,4-Dioxane 39 J 1000 980 ug/L 94 59-134 Ethylbenzene ND 50.0 53.0 ug/L 106 76-121 Ethylene Dibromide ND 50.0 54.0 ug/L 108 81 -118 Trichlorofluoromethane ND 50.0 36.6 ug/L 73 57-144 MS MS Surrogate %Recovery Qualifier Limits 1,2-Dichloroethane-d4 (Surr) 97 70- 127 Toluene-d8 (Surr) 105 80-125 4-Bromofluorobenzene (Surr) 105 78-120 Dibromofluoromethane (Surr) 97 77-120 Lab Sample ID: 240-184832-1-31 MSD Client Sample ID: Matrix Spike Duplicate j Matrix: Water Prep Type: Total/NA Analysis Batch: 612868 Sample Sample Spike MSD MSD %Rec RPD Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits RPD Limit Acetone ND 200 194 ug/L 97 50-137 6 21 2-Butanone (MEK) ND 200 196 ug/L 98 53 - 135 1 20 Benzene 13 50.0 63.6 ug/L 102 69 -126 2 20 Chlorobenzene ND 50.0 52.5 ug/L 105 78-118 0 20 Carbon disulfide ND 50.0 48.9 ug/L 98 56 -128 2 20 Carbon tetrachloride ND 50.0 52.4 ug/L 105 60 -133 6 20 Cyclohexane ND 50.0 49.9 ug/L 100 57 -134 5 32 1,2-Dibromo-3-Chloropropane ND 50.0 54.5 ug/L 109 58-122 16 21 Bromomethane ND 50.0 41.6 ug/L 83 25-163 28 40 Bromoform ND 50.0 55.5 ug/L 111 57 -125 2 20 Chloroethane ND 50.0 44.0 ug/L 88 52 -144 4 30 Chloroform ND 50.0 51.5 ug/L 103 68 -128 1 20 Chlorobromomethane ND 50.0 51.5 ug/L 103 71 -130 0 20 Dichlorobromomethane ND 50.0 53.4 ug/L 107 67-126 3 20 Chlorodibromomethane ND 50.0 54.5 ug/L 109 71 -122 1 20 Isopropylbenzene ND 50.0 56.2 ug/L 112 70-127 5 20 Eurofins Denver Page 84 of 160 6/1/2023 QC Sample Results Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon --_--- ---- __ -- - -- - Method: 8260D - Volatile Organic Compounds by GC/MS (Continued) Lab Sample ID: 240-184832-1-31 MSD Client Sample ID: Matrix Spike Duplicate Matrix: Water Prep Type: Total/NA Analysis Batch: 612868 Analyte 2-Hexanone Chloromethane Dichlorodifluoromethane trans-1,2-Dichloroethene trans-1,3-Dichloropropene Methylene Chloride Methyl acetate Methyl tert-butyl ether 4-Methyl-2-pentanone (MIBK) Methylcyclohexane Styrene 1,1,2,2-Tetrachloroethane 1,2,3-Trichlorobenzene 1,2,4-Trichlorobenzene Toluene 1,1,1-Trichloroethane 1,1,2-Trichloroethane Trichloroethene 1,1,2-Trichloro-1,2,2-trifluoroetha ne Vinyl chloride m-Xylene & p-Xylene o-Xylene Tetrachloroethene 1,2-Dichlorobenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene cis-1,2-Dichloroethene cis-1,3-Dichloropropene 1,1-Dichloroethane 1,1-Dichloroethene 1,2-Dichloroethane 1,2-Dichloropropane 1,4-Dioxane Ethylbenzene Ethylene Dibromide Trichlorofluoromethane Surrogate 1,2-Dichloroethane-d4 (Surr) Toluene-d8 (Surr) 4-Bromofluorobenzene (Surr) Dibromofluoromethane (Surr) Sample Sample Spike MSD MSD %Rec RPD Result Qualifier Added Result Qualifier Unit D %Rec Limits RPD Limit ND 200 224 ug/L 112 58 -134 1 21 ND 50.0 47.6 ug/L 95 43-142 6 20 ND 50.0 43.9 ug/L 88 26 -152 18 21 ND 50.0 51.1 ug/L 102 66-129 3 20 ND 50.0 49.0 ug/L 98 66 -127 6 20 1.0 J 50.0 51.7 ug/L 101 64 -128 2 20 ND 100 82.7 ug/L 83 59 -133 15 20 ND 50.0 51.9 ug/L 104 70-127 0 20 ND 200 218 ug/L 109 56-135 3 20 ND 50.0 46.3 ug/L 93 58 -136 0 21 m ND 50.0 56.0 ug/L 112 79 -120 1 20 ND 50.0 57.1 ug/L 114 72 -122 5 20 ND F2 50.0 53.6 F2 ug/L 107 70-127 23 20 ND 50.0 50.3 ug/L 101 73-124 6 20 ND 50.0 50.0 ug/L 100 68-127 1 20 ND 50.0 51.5 ug/L 103 62 -132 6 20 ND 50.0 52.9 ug/L 106 72 -128 2 20 ND 50.0 51.8 ug/L 104 70-125 0 20 ND 50.0 47.3 ug/L 95 60-137 4 23 ND 50.0 48.1 ug/L 96 53-141 10 25 ND 50.0 53.0 ug/L 106 76 -122 1 20 ND 50.0 52.4 ug/L 105 77 -120 1 20 ND 50.0 53.5 ug/L 107 72 -127 2 20 ND 50.0 54.4 ug/L 109 77-121 4 20 ND 50.0 54.5 ug/L 109 76-121 3 20 ND 50.0 54.0 ug/L 108 76-119 1 20 ND 50.0 51.2 ug/L 102 69-126 0 20 ND 50.0 51.5 ug/L 103 75-120 7 20 0.62 J 50.0 52.5 ug/L 104 66 -130 4 20 ND 50.0 50.1 ug/L 100 62 - 130 3 21 ND 50.0 51.7 ug/L 103 61 -130 3 20 ND 50.0 51.5 ug/L 103 68 -127 1 20 39 J 1000 991 ug/L 95 59 -134 1 24 ND 50.0 54.2 ug/L 108 76 -121 2 20 ND 50.0 55.4 ug/L ill 81 - 118 3 20 ND 50.0 44.3 ug/L 89 57 -144 19 28 MSD MSD %Recovery Qualifier 97 105 103 97 Limits 70 -127 80-125 78 - 120 77- 120 Eurofins Denver Page 85 of 160 6/1 /2023 QC Sample Results Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon Method: 8260D - Volatile Organic Compounds by GC/MS (Continued) Lab Sample ID: MB 280-612891/7 Client Sample ID: Method Blank Matrix: Water Prep Type: Total/NA Analysis Batch: 612891 MB MB Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Acetone ND 15 6.6 ug/L 05/17/23 23:21 1 2-Butanone (MEK) ND 15 6.0 ug/L 05/17/23 23:21 1 Benzene ND 1.0 0.31 ug/L 05/17/23 23:21 1 Chlorobenzene ND 1.0 0.42 ug/L 05/17/23 23:21 1 Carbon disulfide ND 2.0 0.63 ug/L 05/17/23 23:21 1 Carbon tetrachloride ND 1.0 0.57 ug/L 05/17/23 23:21 1 Cyclohexane ND 1.0 0.44 ug/L 05/17/23 23:21 1 1,2-Dibromo-3-Chloropropane ND 5.0 1.8 ug/L 05/17/23 23:21 1 Bromomethane ND 5.0 2.4 ug/L 05/17/23 23:21 1 Bromoform ND 2.0 1.2 ug/L 05/17/23 23:21 1 M Chloroethane ND 4.0 1.4 ug/L 05/17/23 23:21 1 Chloroform ND 1.0 0.36 ug/L 05/17/23 23:21 1 Chlorobromomethane ND 1.0 0.40 ug/L 05/17/23 23:21 1 Dichlorobromomethane ND 1.0 0.39 ug/L 05/17/23 23:21 1 Chlorodibromomethane ND 2.0 0.62 ug/L 05/17/23 23:21 1 Isopropylbenzene ND 1.0 0.36 ug/L 05/17/23 23:21 1 2-Hexanone ND 5.0 1.7 ug/L 05/17/23 23:21 1 Chloromethane ND 2.0 0.75 ug/L 05/17/23 23:21 1 Dichlorodifluoromethane ND 3.0 0.96 ug/L 05/17/23 23:21 1 trans-1,2-Dichloroethene ND 1.0 0.37 ug/L 05/17/23 23:21 1 trans-1,3-Dichloropropene ND 2.0 0.65 ug/L 05/17/23 23:21 1 Methylene Chloride ND 2.0 0.94 ug/L 05/17/23 23:21 1 Methyl acetate ND 5.0 1.6 ug/L 05/17/23 23:21 1 Methyl tert-butyl ether ND 5.0 0.25 ug/L 05/17/23 23:21 1 4-Methyl-2-pentanone (MIBK) ND 5.0 0.98 ug/L 05/17/23 23:21 1 Methylcyclohexane ND 1.0 0.31 ug/L 05/17/23 23:21 1 Styrene ND 1.0 0.36 ug/L 05/17/23 23:21 1 1,1,2,2-Tetrachloroethane ND 1.0 0.21 ug/L 05/17/23 23:21 1 1,2,3-Trichlorobenzene ND 2.0 0.70 ug/L 05/17/23 23:21 1 1,2,4-Trichlorobenzene ND 1.0 0.58 ug/L 05/17/23 23:21 1 Toluene ND 1.0 0.32 ug/L 05/17/23 23:21 1 1,1,1-Trichloroethane ND 1.0 0.39 ug/L 05/17/23 23:21 1 1,1,2-Trichloroethane ND 1.0 0.27 ug/L 05/17/23 23:21 1 Trichloroethene ND 1.0 0.30 ug/L 05/17/23 23:21 1 1,1,2-Trichloro-1,2,2-tdfluoroethane ND 3.0 0.73 ug/L 05/17/23 23:21 1 Vinyl chloride ND 2.0 0.51 ug/L 05/17/23 23:21 1 m-Xylene & p-Xylene ND 2.0 0.36 ug/L 05/17/23 23:21 1 o-Xylene ND 1.0 0.33 ug/L 05/17/23 23:21 1 Tetrachloroethene ND 1.0 0.40 ug/L 05/17/23 23:21 1 1,2-Dichlorobenzene ND 1.0 0.37 ug/L 05/17/23 23:21 1 1,3-Dichlorobenzene ND 1.0 0.33 ug/L 05/17/23 23:21 1 1,4-Dichlorobenzene ND 1.0 0.39 ug/L 05/17/23 23:21 1 cis-1,2-Dichloroethene ND 1.0 0.32 ug/L 05/17/23 23:21 1 cis-1,3-Dichloropropene ND 2.0 0.63 ug/L 05/17/23 23:21 1 1,1-Dichloroethane ND 1.0 0.22 ug/L 05/17/23 23:21 1 1,1-Dichloroethene ND 1.0 0.23 ug/L 05/17/23 23:21 1 1,2-Dichloroethane ND 1.0 0.54 ug/L 05/17/23 23:21 1 1,2-Dichloropropane ND 1.0 0.52 ug/L 05/17/23 23:21 1 Eurofins Denver Page 86 of 160 6/1/2023 QC Sample Results Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Method: 8260D - Volatile Organic Compounds by GC/MS (Continued Lab Sample ID: MB 280-612891/7 Matrix: Water Analysis Batch: 612891 Analyte 1,4-Dioxane Ethylbenzene Ethylene Dibromide Trichlorofluoromethane Surrogate 1,2-Dichloroethane-d4 (Surr) Toluene-d8 (Surr) 4-Bromofluorobenzene (Surr) Dibromofluoromethane (Surr) Job ID: 280-176200-1 Client Sample ID: Method Blank Prep Type: Total/NA MB MB Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac ND 150 19 ug/L 05/17/23 23:21 1 ND 1.0 0.30 ug/L 05/17/23 23:21 1 ND 1.0 0.40 ug/L 05/17/23 23:21 1 ND 2.0 0.57 ug/L 05/17/23 23:21 1 MB MB %Recovery Qualifier Limits Prepared Analyzed Dil Fac 93 70 - 127 05117123 23:21 1 103 80 - 125 05117123 23:21 1 103 78 - 120 05117123 23:21 1 m 97 77- 120 05117123 23:21 1 Lab Sample ID: LCS 280-612891/1002 Matrix: Water Analysis Batch: 612891 Client Sample ID: Lab Control Sample Prep Type: Total/NA Analyte Spike Added LCS LCS Result Qualifier Unit D %Rec %Rec Limits Acetone 200 173 ug/L 86 50-137 2-Butanone (MEK) 200 178 ug/L 89 53-135 Benzene 50.0 45.4 ug/L 91 69 -126 Chlorobenzene 50.0 48.6 ug/L 97 78-118 Carbon disulfide 50.0 41.9 ug/L 84 56 -128 Carbon tetrachloride 50.0 48.9 ug/L 98 60 -133 Cyclohexane 50.0 45.5 ug/L 91 57-134 1,2-Dibromo-3-Chloropropane 50.0 53.0 ug/L 106 58-122 Bromomethane 50.0 38.4 ug/L 77 25-163 Bromoform 50.0 51.9 ug/L 104 57 -125 Chloroethane 50.0 41.8 ug/L 84 52 -144 Chloroform 50.0 45.8 ug/L 92 68 -128 Chlorobromomethane 50.0 46.0 ug/L 92 71 -130 Dichlorobromomethane 50.0 45.8 ug/L 92 67 -126 Chlorodibromomethane 50.0 50.1 ug/L 100 71 - 122 Isopropylbenzene 50.0 51.8 ug/L 104 70 -127 2-Hexanone 200 203 ug/L 102 58-134 Chloromethane 50.0 42.4 ug/L 85 43-142 Dichlorodifluoromethane 50.0 39.1 ug/L 78 26-152 trans-1,2-Dichloroethene 50.0 44.4 ug/L 89 66 -129 trans-1,3-Dichloropropene 50.0 46.3 ug/L 93 66-127 Methylene Chloride 50.0 45.7 ug/L 91 64 -128 Methyl acetate 100 90.2 ug/L 90 59 -133 Methyl tert-butyl ether 50.0 45.6 ug/L 91 70 -127 4-Methyl-2-pentanone (MIBK) 200 195 ug/L 97 56-135 Methylcyclohexane 50.0 45.1 ug/L 90 58 -136 Styrene 50.0 50.7 ug/L 101 79 -120 1,1,2,2-Tetrachloroethane 50.0 47.9 ug/L 96 72-122 1,2,3-Trichlorobenzene 50.0 50.7 ug/L 101 70-127 1,2,4-Trichlorobenzene 50.0 48.5 ug/L 97 73 -124 Toluene 50.0 45.5 ug/L 91 68-127 1,1,1-Trichloroethane 50.0 47.1 ug/L 94 62-132 Eurofins Denver Page 87 of 160 6/1/2023 QC Sample Results Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon Method: 8260D - Volatile Organic Compounds by GC/MS (Continued) Lab Sample ID: LCS 280-612891/1002 Client Sample ID: Lab Control Sample Matrix: Water Prep Type: Total/NA Analysis Batch: 612891 Analyte Spike Added LCS LCS Result Qualifier Unit D %Rec %Rec Limits 1,1,2-Trichloroethane 50.0 47.6 ug/L 95 72-128 Trichloroethene 50.0 46.6 ug/L 93 70 -125 1,1,2-Trichloro-1,2,2-trifluoroetha 50.0 49.6 ug/L 99 60-137 ne Vinyl chloride 50.0 40.6 ug/L 81 53 -141 m-Xylene & p-Xylene 50.0 50.0 ug/L 100 76 -122 o-Xylene 50.0 50.0 ug/L 100 77 -120 Tetrachloroethene 50.0 49.3 ug/L 99 72 -127 1,2-Dichlorobenzene 50.0 53.0 ug/L 106 77-121 1,3-Dichlorobenzene 50.0 52.5 ug/L 105 76-121 1,4-Dichlorobenzene 50.0 48.7 ug/L 97 76-119 cis- 1,2-Dichloroethene 50.0 45.2 ug/L 90 69-126 cis- 1,3-Dichloropropene 50.0 46.6 ug/L 93 75-120 1,1-Dichloroethane 50.0 44.0 ug/L 88 66-130 1,1-Dichloroethene 50.0 46.5 ug/L 93 62-130 1,2-Dichloroethane 50.0 40.8 ug/L 82 61-130 1,2-Dichloropropane 50.0 44.0 ug/L 88 68-127 1,4-Dioxane 1000 1020 ug/L 102 59 -134 Ethylbenzene 50.0 50.0 ug/L 100 76 -121 Ethylene Dibromide 50.0 47.8 ug/L 96 81 -118 Trichlorofluoromethane 50.0 42.5 ug/L 85 57 -144 LCS LCS Surrogate %Recovery Qualifier Limits 1,2-Dichloroethane-d4 (Surr) 92 70- 127 Toluene-d8 (Surr) 102 80- 125 4-Bromofluorobenzene (Surr) 102 78- 120 Dibromofluoromethane (Surr) 98 77- 120 Lab Sample ID: LCSD 280-612891/4 Client Sample ID: Lab Control Sample Dup Matrix: Water Prep Type: Total/NA Analysis Batch: 612891 Spike LCSD LCSD %Rec RPD Analyte Added Result Qualifier Unit D %Rec Limits RPD Limit Acetone 200 173 ug/L 87 50 -137 0 21 2-Butanone (MEK) 200 177 ug/L 88 53 - 135 0 20 Benzene 50.0 44.3 ug/L 89 69 -126 2 20 Chlorobenzene 50.0 48.4 ug/L 97 78 -118 0 20 Carbon disulfide 50.0 42.6 ug/L 85 56 -128 2 20 Carbon tetrachloride 50.0 49.5 ug/L 99 60 -133 1 20 Cyclohexane 50.0 46.3 ug/L 93 57 -134 2 32 1,2-Dibromo-3-Chloropropane 50.0 52.2 ug/L 104 58 -122 1 21 Bromomethane 50.0 39.2 ug/L 78 25 -163 2 40 Bromoform 50.0 51.0 ug/L 102 57 -125 2 20 Chloroethane 50.0 40.2 ug/L 80 52-144 4 30 Chloroform 50.0 45.3 ug/L 91 68-128 1 20 Chlorobromomethane 50.0 45.7 ug/L 91 71 -130 1 20 Dichlorobromomethane 50.0 45.8 ug/L 92 67 -126 0 20 Chlorodibromomethane 50.0 50.0 ug/L 100 71 -122 0 20 Isopropylbenzene 50.0 52.6 ug/L 105 70-127 1 20 Eurofins Denver Hio Page 88 of 160 6/1/2023 QC Sample Results Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon Method: 8260D -Volatile Organic Compounds by GC/MS (Continued) Lab Sample ID: LCSD 280-612891/4 Client Sample ID: Lab Control Sample Dup Matrix: Water Prep Type: Total/NA Analysis Batch: 612891 Spike LCSD LCSD %Rec RPD Analyte Added Result Qualifier Unit D %Rec Limits RPD Limit 2-Hexanone 200 203 ug/L 101 58-134 0 21 Chloromethane 50.0 42.3 ug/L 85 43-142 0 20 Dichlorodifluoromethane 50.0 39.3 ug/L 79 26-152 1 21 trans-1,2-Dichloroethene 50.0 43.7 ug/L 87 66-129 1 20 trans-1,3-Dichloropropene 50.0 46.7 ug/L 93 66-127 1 20 Methylene Chloride 50.0 45.4 ug/L 91 64 -128 1 20 Methyl acetate 100 89.5 ug/L 90 59 -133 1 20 Methyl tert-butyl ether 50.0 46.2 ug/L 92 70 -127 1 20 4-Methyl-2-pentanone (MIBK) 200 195 ug/L 98 56-135 0 20 Methylcyclohexane 50.0 45.8 ug/L 92 58-136 1 21 m Styrene 50.0 49.8 ug/L 100 79 -120 2 20 1,1,2,2-Tetrachloroethane 50.0 48.3 ug/L 97 72-122 1 20 1,2,3-Trichlorobenzene 50.0 52.0 ug/L 104 70-127 3 20 1,2,4-Trichlorobenzene 50.0 50.3 ug/L 101 73-124 4 20 Toluene 50.0 45.7 ug/L 91 68 -127 0 20 1, 1, 1 -Trichloroethane 50.0 48.2 ug/L 96 62-132 2 20 1,1,2-Trichloroethane 50.0 46.6 ug/L 93 72-128 2 20 Trichloroethene 50.0 46.8 ug/L 94 70-125 1 20 1,1,2-Trichloro-1,2,2-trifluoroetha 50.0 49.9 ug/L 100 60-137 1 23 ne Vinyl chloride 50.0 40.5 ug/L 81 53-141 0 25 m-Xylene & p-Xylene 50.0 49.8 ug/L 100 76 -122 0 20 o-Xylene 50.0 48.9 ug/L 98 77 -120 2 20 Tetrachloroethene 50.0 49.5 ug/L 99 72 -127 0 20 1,2-Dichlorobenzene 50.0 52.7 ug/L 105 77 -121 1 20 1,3-Dichlorobenzene 50.0 52.6 ug/L 105 76-121 0 20 1,4-Dichlorobenzene 50.0 48.7 ug/L 97 76 -119 0 20 cis- 1,2-Dichloroethene 50.0 45.8 ug/L 92 69 -126 1 20 cis-1,3-Dichloropropene 50.0 46.3 ug/L 93 75-120 1 20 1,1-Dichloroethane 50.0 44.3 ug/L 89 66-130 1 20 1,1-Dichloroethene 50.0 47.0 ug/L 94 62-130 1 21 1,2-Dichloroethane 50.0 40.7 ug/L 81 61 -130 0 20 1,2-Dichloropropane 50.0 43.9 ug/L 88 68 -127 0 20 1,4-Dioxane 1000 1030 ug/L 103 59-134 1 24 Ethylbenzene 50.0 50.2 ug/L 100 76 -121 0 20 Ethylene Dibromide 50.0 47.6 ug/L 95 81 -118 0 20 Trichlorofluoromethane 50.0 41.6 ug/L 83 57 -144 2 28 LCSD LCSD Surrogate %Recovery Qualifier Limits 1,2-Dichloroethane-d4 (Surr) 93 70-127 Toluene-d8 (Surr) 102 80-125 4-Bromofluorobenzene (Surr) 103 78-120 Dibromofluoromethane (Surr) 97 77-120 Eurofins Denver Page 89 of 160 6/1/2023 QC Sample Results Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Method: NWTPH-Gx - Northwest - Volatile Petroleum Products (GC/MS Lab Sample ID: MB 580-425808/6 Matrix: Water Analysis Batch: 425808 MB MB Analyte Result Qualifier RL MDL Unit Gasoline ND 0.050 0.014 mg/L MB MB Surrogate %Recovery Qualifier Limits 4-Bromofluorobenzene (Surr) 88 77-123 Lab Sample ID: LCS 580-425808/9 Matrix: Water Analysis Batch: 425808 Analyte Gasoline LCS LCS Surrogate %Recovery Qualifier 4-Bromofluorobenzene (Surf) 100 Lab Sample ID: LCSD 580425808/10 Matrix: Water Analysis Batch: 425808 Analyte Gasoline Job ID: 280-176200-1 Client Sample ID: Method Blank Prep Type: Total/NA D Prepared Analyzed Dil Fac 05/12/23 14:36 1 Prepared Analyzed Dil Fac 05112123 14:36 1 Client Sample ID: Lab Control Sample Prep Type: Total/NA Spike LCS LCS %Rec Added Result Qualifier Unit D %Rec Limits 1.00 1.02 mg/L 102 55 -148 Limits 77- 123 Client Sample ID: Lab Control Sample Dup Prep Type: Total/NA Spike LCSD LCSD %Rec RPD Added Result Qualifier Unit D %Rec Limits RPD Limit 1.00 1.02 mg/L 102 55 -148 0 10 LCSD LCSD Surrogate %Recovery Qualifier Limits 4-Bromofluorobenzene (Surr) 103 77-123 Method: 8270D - Semivolatile Organic Compounds (GC/MS) Lab Sample ID: MB 280-612492/1-A Matrix: Solid Analysis Batch: 612910 MB MB Analyte Result Qualifier 1,2,4-Trichlorobenzene ND 1,2-Dichlorobenzene ND 1,3-Dichlorobenzene ND 2,2'-oxybis[l-chloropropanel ND 2,4,5-Trichlorophenol ND 2,4,6-Trichlorophenol ND 2,4-Dimethylphenol ND 2,4-Dinitrotoluene ND 2,4-Dinitrophenol ND 2,4-Dichlorophenol ND 2-Chlorophenol ND 2-Chloronaphthalene ND 2-Nitrophenol ND 2-Methylphenol ND 2-Nitroaniline ND 3-Nitroaniline ND Client Sample ID: Method Blank Prep Type: Total/NA Prep Batch: 612492 RL MDL Unit D Prepared Analyzed Dil Fac 330 28 ug/Kg 05/15/2315:08 05/18/2312:25 1 330 22 ug/Kg 05/15/2315:08 05/18/2312:25 1 330 12 ug/Kg 05/15/2315:08 05/18/2312:25 1 330 23 ug/Kg 05/15/2315:08 05/18/2312:25 1 330 10 ug/Kg 05/15/2315:08 05/18/2312:25 1 330 10 ug/Kg 05/15/2315:08 05/18/2312:25 1 330 66 ug/Kg 05/15/2315:08 05/18/2312:25 1 330 66 ug/Kg 05/15/2315:08 05/18/2312:25 1 1600 330 ug/Kg 05/15/2315:08 05/18/2312:25 1 330 10 ug/Kg 05/15/2315:08 05/18/2312:25 1 330 21 ug/Kg 05/15/2315:08 05/18/2312:25 1 330 10 ug/Kg 05/15/2315:08 05/18/2312:25 1 330 10 ug/Kg 05/15/2315:08 05/18/2312:25 1 330 13 ug/Kg 05/15/2315:08 05/18/2312:25 1 1600 50 ug/Kg 05/15/2315:08 05/18/2312:25 1 1600 73 ug/Kg 05/15/2315:08 05/18/2312:25 1 Eurofins Denver 10 Page 90 of 160 6/1/2023 QC Sample Results Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon Method: 8270D - Semivolatile Organic Compounds (GC/MS) (Continued) Lab Sample ID: MB 280-61249211-A Client Sample ID: Method Blank Matrix: Solid Prep Type: Total/NA Analysis Batch: 612910 Prep Batch: 612492 MB MB Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 4,6-Dinitro-2-methylphenol ND 1600 330 ug/Kg 05/15/23 15:08 05/18/23 12:25 1 4-Bromophenyl phenyl ether ND 330 19 ug/Kg 05/15/23 15:08 05/18/23 12:25 1 4-Chloro-3-methylphenol ND 330 25 ug/Kg 05/15/23 15:08 05/18/23 12:25 1 4-Chloroaniline ND 330 82 ug/Kg 05/15/23 15:08 05/18/23 12:25 1 4-Chlorophenyl phenyl ether ND 330 21 ug/Kg 05/15/23 15:08 05/18/23 12:25 1 4-Nitrophenol ND 1600 97 ug/Kg 05/15/23 15:08 05/18/23 12:25 1 4-Nitroaniline ND 1600 73 ug/Kg 05/15/23 15:08 05/18/23 12:25 1 Acenaphthene ND 330 10 ug/Kg 05/15/23 15:08 05/18/23 12:25 1 Benzo[k]fluoranthene ND 330 40 ug/Kg 05/15/23 15:08 05/18/23 12:25 1 Anthracene ND 330 17 ug/Kg 05/15/23 15:08 05/18/23 12:25 1 m Acetophenone ND 330 20 ug/Kg 05/15/23 15:08 05/18/23 12:25 1 Acenaphthylene ND 330 82 ug/Kg 05/15/23 15:08 05/18/23 12:25 1 Benzo[a]anthracene ND 330 20 ug/Kg 05/15/23 15:08 05/18/23 12:25 1 Benzo[b]fluoranthene ND 330 26 ug/Kg 05/15/23 15:08 05/18/23 12:25 1 Benzo[g,h,i]perylene ND 330 16 ug/Kg 05/15/23 15:08 05/18/23 12:25 1 Benzo[a]pyrene ND 330 20 ug/Kg 05/15/23 15:08 05/18/23 12:25 1 Benzyl alcohol ND 330 10 ug/Kg 05/15/23 15:08 05/18/23 12:25 1 Bis(2-chloroethoxy)methane ND 330 23 ug/Kg 05/15/23 15:08 05/18/23 12:25 1 Bis(2-chloroethyl)ether ND 330 17 ug/Kg 05/15/23 15:08 05/18/23 12:25 1 Bis(2-ethylhexyl) phthalate ND 330 46 ug/Kg 05/15/23 15:08 05/18/23 12:25 1 Butyl benzyl phthalate ND 330 43 ug/Kg 05/15/23 15:08 05/18/23 12:25 1 Carbazole ND 330 36 ug/Kg 05/15/23 15:08 05/18/23 12:25 1 Chrysene ND 330 27 ug/Kg 05/15/23 15:08 05/18/23 12:25 1 Dibenz(a,h)anthracene ND 330 19 ug/Kg 05/15/23 15:08 05/18/23 12:25 1 Di-n-butyl phthalate ND 330 29 ug/Kg 05/15/23 15:08 05/18/23 12:25 1 Di-n-octyl phthalate ND 330 41 ug/Kg 05/15/23 15:08 05/18/23 12:25 1 Dibenzofuran ND 330 20 ug/Kg 05/15/23 15:08 05/18/23 12:25 1 Diethyl phthalate ND 660 26 ug/Kg 05/15/23 15:08 05/18/23 12:25 1 Dimethyl phthalate ND 330 23 ug/Kg 05/15/23 15:08 05/18/23 12:25 1 Fluoranthene ND 330 36 ug/Kg 05/15/23 15:08 05/18/23 12:25 1 Fluorene ND 330 18 ug/Kg 05/15/23 15:08 05/1812312:25 1 Hexachlorobenzene ND 330 29 ug/Kg 05/15/23 15:08 05/18/23 12:25 1 Hexachlorobutadiene ND 330 10 ug/Kg 05/15/23 15:08 05/18/23 12:25 1 Hexachlorocyclopentadiene ND 1600 110 ug/Kg 05/15/23 15:08 05/18/23 12:25 1 Hexachloroethane ND 330 21 ug/Kg 05/15/23 15:08 05/18/23 12:25 1 Indeno[1,2,3-cd]pyrene ND 330 22 ug/Kg 05/15/23 15:08 05/18/23 12:25 1 Isophorone ND 330 17 ug/Kg 05/15/23 15:08 05/18/23 12:25 1 N-Nitrosodi-n-propylamine ND 330 68 ug/Kg 05/15/23 15:08 05/18/23 12:25 1 N-Nitrosodiphenylamine ND 330 21 ug/Kg 05/15/23 15:08 05/18/23 12:25 1 Pentachlorophenol ND 1600 330 ug/Kg 05/15/23 15:08 05/18/23 12:25 1 Phenanthrene ND 330 17 ug/Kg 05/15/23 15:08 05118/2312:25 1 Phenol ND 330 18 ug/Kg 05/15/23 15:08 05/18/23 12:25 1 Pyrene ND 330 12 ug/Kg 05/15/23 15:08 05/18/23 12:25 1 1,4-Dichlorobenzene ND 330 14 ug/Kg 05/15/23 15:08 05/18/23 12:25 1 Naphthalene ND 330 31 ug/Kg 05/15/23 15:08 05/18/23 12:25 1 2-Methylnaphthalene ND 330 19 ug/Kg 05/15/23 15:08 05/18/23 12:25 1 Nitrobenzene ND 330 22 ug/Kg 05/15/23 15:08 05/18/23 12:25 1 3,3'-Dichlorobenzidine ND 660 90 ug/Kg 05/15/23 15:08 05/18/23 12:25 1 3 & 4 Methylphenol ND 330 33 ug/Kg 05/15/23 15:08 05/18/23 12:25 1 Eurofins Denver Page 91 of 160 6/1/2023 QC Sample Results Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon Method: 8270D - Semivolatile Organic Compounds (GC/MS) (Continued) Lab Sample ID: MB 280-612492/1-A Client Sample ID: Method Blank Matrix: Solid Prep Type: Total/NA Analysis Batch: 612910 Prep Batch: 612492 MB MB Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 1,1'-Biphenyl ND 330 24 ug/Kg 05/15/23 15:08 05/18/2312:25 1 1,2,4,5-Tetrachlorobenzene ND 330 49 ug/Kg 05/15/23 15:08 05/18/2312:25 1 1,3-Dinitrobenzene ND 330 71 ug/Kg 05/15/23 15:08 05/18/2312:25 1 1-Methylnaphthalene ND 330 11 ug/Kg 05/15/23 15:08 05/18/2312:25 1 2,3,4,6-Tetrachlorophenol ND 1600 140 ug/Kg 05/15/23 15:08 05/18/2312:25 1 2,6-Dichlorophenol ND 330 22 ug/Kg 05/15/23 15:08 05/18/2312:25 1 2,6-Dinitrotoluene ND 330 28 ug/Kg 05/15/23 15:08 05/18/2312:25 1 Aniline ND 330 130 ug/Kg 05/15/23 15:08 05/18/2312:25 1 Azobenzene ND 330 22 ug/Kg 05/15/23 15:08 05/18/2312:25 1 Benzaldehyde ND 330 67 ug/Kg 05/15/23 15:08 05/18/2312:25 1 m Benzidine ND 3300 990 ug/Kg 05/15/23 15:08 05/18/2312:25 1 Caprolactam ND 330 110 ug/Kg 05/15/23 15:08 05/18/2312:25 1 Diphenylamine ND 330 44 ug/Kg 05/15/23 15:08 05/18/2312:25 1 N-Nitrosodimethylamine ND 330 37 ug/Kg 05/15/23 15:08 05/18/2312:25 1 Pyridine ND 660 40 ug/Kg 05/15/23 15:08 05/18/2312:25 1 Hexadecane ND 330 13 ug/Kg 05/15/23 15:08 05/18/2312:25 1 1,2-Diphenylhydrazine(as ND 330 22 ug/Kg 05/15/23 15:08 05/18/2312:25 1 Azobenzene) 3-Methylphenol ND 330 33 ug/Kg 05/15/23 15:08 05/18/2312:25 1 4-Methylphenol ND 330 33 ug/Kg 05/15/23 15:08 05/18/2312:25 1 Benzoic acid ND 1600 330 ug/Kg 05/15/23 15:08 05/18/23 12:25 1 Famphur ND 660 34 ug/Kg 05/15/23 15:08 05/18/2312:25 1 MB MB Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 2-Fluorobiphenyl 101 33-135 05/15/23 15:08 05118123 12:25 1 2-Fluorophenol (Surr) 97 39-135 05115123 15:08 05118123 12:25 1 2,4, 6-Tribromophenol (Surr) 90 24 -135 05115123 15:08 05118123 12:25 1 Nitrobenzene-d5 (Surr) 98 32 -135 05115123 15:08 05/18/23 12:25 1 Phenol-d5 (Surr) 104 39 -135 05115123 15.08 05118123 12.25 1 Terphenyl-d14 (Surr) 123 30-135 05/15/23 15:08 05118123 12.25 1 F Lab Sample ID: LCS 280-612492/2-A Client Sample ID: Lab Control Sample Matrix: Solid Prep Type: Total/NA Analysis Batch: 612910 Prep Batch: 612492 Spike LCS LCS %Rec Analyte Added Result Qualifier Unit D %Rec Limits 1,2,4-Trichlorobenzene 2670 2490 ug/Kg 93 57-105 1,2-Dichlorobenzene 2670 2290 ug/Kg 86 55 - 106 1,3-Dichlorobenzene 2670 2310 ug/Kg 87 54 - 104 2,2'-oxybis[l-chloropropane] 2670 2120 ug/Kg 80 52 -110 2,4,5-Trichlorophenol 2670 3110 ug/Kg 117 55 -126 2,4,6-Trichlorophenol 2670 3130 ug/Kg 117 55 -135 2,4-Dimethylphenol 2670 2870 ug/Kg 108 60 -111 2,4-Dinitrotoluene 2670 3170 ug/Kg 119 59 -127 i 2,4-Dinitrophenol 5330 6230 .+ ug/Kg 117 49-111 2,4-Dichlorophenol 2670 2870 ug/Kg 108 54 -114 2-Chlorophenol 2670 2720 ug/Kg 102 58 -110 2-Chloronaphthalene 2670 3030 ug/Kg 114 53-121 2-Nitrophenol 2670 2780 ug/Kg 104 59 -109 Eurofins Denver Page 92 of 160 6/1 /2023 QC Sample Results Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon Method: 8270D - Semivolatile Organic Compounds (GC/MS) (Continued) Lab Sample ID: LCS 280-612492/2-A Client Sample ID: Lab Control Sample Matrix: Solid Prep Type: Total/NA Analysis Batch: 612910 Prep Batch: 612492 Spike LCS LCS %Rec Analyte Added Result Qualifier Unit D %Rec Limits 2-Methylphenol 2670 2720 ug/Kg 102 57 -112 2-Nitroaniline 2670 2910 ug/Kg 109 59 -123 3-Nitroaniline 2670 1320 J ug/Kg 49 39-107 4,6-Dinitro-2-methylphenol 5330 5330 ug/Kg 100 60-109 4-Bromophenyl phenyl ether 2670 2870 ug/Kg 108 65 -111 4-Chloro-3-methylphenol 2670 3050 *+ ug/Kg 114 65-113 4-Chloroaniline 2670 921 ug/Kg 35 28 - 93 4-Chlorophenyl phenyl ether 2670 2800 ug/Kg 105 57 -122 4-Nitrophenol 5330 5900 ug/Kg 111 59 -128 4-Nitroaniline 2670 2490 ug/Kg 93 50-121 Acenaphthene 2670 2800 ug/Kg 105 49-130 Benzo[k]fluoranthene 2670 3210 *+ ug/Kg 120 68-119 Anthracene 2670 2810 ug/Kg 105 66-112 Acetophenone 2670 2460 ug/Kg 92 42-97 Acenaphthylene 2670 2730 ug/Kg 102 57 -118 Benzo[a]anth race ne 2670 3160 *+ ug/Kg 118 64-114 Benzo[b]fluoranthene 2670 3110 *+ ug/Kg 117 66-114 Benzo[g,h,i]perylene 2670 2980 ug/Kg 112 66 -112 Benzo[a]pyrene 2670 2870 ug/Kg 107 67-110 Benzyl alcohol 2670 2500 ug/Kg 94 57 -108 Bis(2-chloroethoxy)methane 2670 2840 *+ ug/Kg 107 58-106 Bis(2-chloroethyl)ether 2670 3730 *+ ug/Kg 140 58-110 Bis(2-ethylhexyl) phthalate 2670 3190 *+ ug/Kg 120 63 -115 Butyl benzyl phthalate 2670 3240 *+ ug/Kg 121 63 -116 Carbazole 2670 2890 ug/Kg 108 67-112 Chrysene 2670 2930 ug/Kg 110 66-116 Dibenz(a,h)anthracene 2670 2960 *+ ug/Kg 111 67 -108 Di-n-butyl phthalate 2670 3190 *+ ug/Kg 120 68 -111 Di-n-octyl phthalate 2670 3010 ug/Kg 113 59 -113 Dibenzofuran 2670 2890 ug/Kg 108 57 -122 Diethyl phthalate 2670 3020 ug/Kg 113 62 - 124 Dimethyl phthalate 2670 2940 ug/Kg 110 61 -123 Fluoranthene 2670 2970 ug/Kg 111 67-111 Fluorene 2670 2870 ug/Kg 107 49-133 Hexachlorobenzene 2670 2800 ug/Kg 105 64-112 Hexachlorobutadiene 2670 2400 ug/Kg 90 57-104 Hexachlorocyclopentadiene 5350 5800 *+ ug/Kg 108 49-102 Hexachloroethane 2670 2250 ug/Kg 85 54 -103 Indeno[1,2,3-cd]pyrene 2670 2650 ug/Kg 100 54 -114 Isophorone 2670 2590 ug/Kg 97 55-100 N-Nitrosodi-n-propylamine 2670 2600 ug/Kg 98 56-108 N-Nitrosodiphenylamine 2670 2810 *+ ug/Kg 105 67-102 Pentachlorophenol 5330 5590 ug/Kg 105 54-112 Phenanthrene 2670 2840 ug/Kg 107 63-117 Phenol 2670 2740 ug/Kg 103 56-113 Pyrene 2670 2970 ug/Kg 111 62-118 1,4-Dichlorobenzene 2670 2240 ug/Kg 84 54 -105 Naphthalene 2670 2490 ug/Kg 93 59 -106 2-Methylnaphthalene 2670 2560 ug/Kg 96 55-113 Eurofins Denver Page 93 of 160 6/1/2023 QC Sample Results Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Method: 8270D - Semivolatile Organic Compounds (GC/MS) (Continued Lab Sample ID: LCS 280-612492/2-A Matrix: Solid Analysis Batch: 612910 Analyte Nitrobenzene 3,3'-Dichlorobenzidine 3 & 4 Methylphenol 1,1'-Biphenyl 1,2,4,5-Tetrachlorobenzene 1,3-Dinitrobenzene 1-Methyl naphthalene 2,3,4,6-Tetrachlorophenol 2,6-Dichlorophenol 2,6-Dinitrotoluene Aniline Azobenzene Benzaldehyde Benzidine Caprolactam Diphenylamine N-Nitrosodimethylamine Pyridine Hexadecane 1,2-Diphenylhydrazine(as Azobenzene) 3-Methylphenol 4-Methylphenol Benzoic acid Famphur LCS LCS Surrogate %Recovery Qualifier 2-Fluorobiphenyl 102 2-Fluorophenol (Surr) 100 2,4,6-Tribromophenol (Surr) 115 Nitrobenzene-d5 (Surr) 101 Phenol-d5 (Surr) 110 Terphenyl-d14 (Surr) 114 Client Sample ID Spike Added LCS LCS Result Qualifier Unit D %Rec 2670 2430 ug/Kg 91 5330 2080 ug/Kg 39 2670 2930 ug/Kg 110 2670 2760 ug/Kg 104 2670 2590 ug/Kg 97 2670 3130 ug/Kg 117 2670 2610 ug/Kg 98 2670 3260 ug/Kg 122 2670 2910 ug/Kg 109 2670 3020 ug/Kg 113 2670 260 J `- ug/Kg 10 2670 2890 ug/Kg 108 2670 589 ug/Kg 22 5330 ND ug/Kg 15 2670 2720 ug/Kg 102 2270 2420 ug/Kg 107 2670 2140 ug/Kg 80 5330 1300 ug/Kg 24 2670 2700 ug/Kg 101 2700 2920 ug/Kg 108 Job ID: 280-176200-1 Lab Control Sample Prep Type: Total/NA Prep Batch: 612492 %Rec Limits 57 -105 49-103 54-114 53 -122 53 -112 63-128 60-110 60-126 55-113 58-126 � 24-91 60 -118 10-91 5-55 57-104 61-122 50-102 32 - 79 54-115 60 -118 2670 2930 ug/Kg 110 54-114 2670 2930 ug/Kg 110 54-114 2670 632 J `- ug/Kg 24 43 -115 2670 2240 ug/Kg 84 19-95 Limits 33 - 135 39 - 135 24 - 135 32 - 135 39 - 135 30 - 135 Lab Sample ID: 280-176200-15 MS Matrix: Solid Analysis Batch: 612910 Sample Sample Spike MS MS Analyte Result Qualifier Added Result Qualifier Unit 1,2,4-Trichlorobenzene ND 2550 2240 ug/Kg 1,2-Dichlorobenzene ND 2550 2130 ug/Kg 1,3-Dichlorobenzene ND 2550 2120 ug/Kg 2,2'-oxybis[1-chloropropane] ND 2550 1990 ug/Kg 2,4,5-Trichlorophenol ND 2550 2800 ug/Kg 2,4,6-Trichlorophenol ND 2550 2820 ug/Kg 2,4-Dimethylphenol ND 2550 2410 ug/Kg 2,4-Dinitrotoluene ND 2550 2710 ug/Kg 2,4-Dinitrophenol ND F1 `+ 5100 1250 J F1 ug/Kg 2,4-Dichlorophenol ND 2550 2680 ug/Kg Client Sample ID: DU01-230504-0.5 Prep Type: Total/NA Prep Batch: 612492 %Rec D %Rec Limits 88 57-105 83 55-106 83 54 -104 78 52 -110 110 55-126 ill 55-135 95 60 -111 107 59-127 25 49-111 105 54-114 Eurofins Denver Page 94 of 160 6/1 /2023 QC Sample Results Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon Method: 8270D - Semivolatile Organic Compounds (GC/MS) (Continued) Lab Sample ID: 280-176200-15 MS Client Sample ID: D1.101-230504-0.5 Matrix: Solid Prep Type: Total/NA Analysis Batch: 612910 Prep Batch: 612492 Sample Sample Spike MS MS %Rec Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits 2-Chlorophenol ND 2550 2440 ug/Kg 96 58-110 2-Chloronaphthalene ND F1 2550 3090 ug/Kg 121 53-121 2-Nitrophenol ND 2550 2440 ug/Kg 96 59-109 2-Methylphenol ND 2550 2520 ug/Kg 99 57-112 2-Nitroaniline ND 2550 2660 ug/Kg 105 59-123 3-Nitroaniline ND 2550 2450 ug/Kg 96 39-107 4,6-Dinitro-2-methylphenol ND F1 5100 2710 F1 ug/Kg 53 60-109 4-Bromophenyl phenyl ether ND 2550 2670 ug/Kg 105 65 -111 4-Chloro-3-methylphenol ND *+ 2550 2870 ug/Kg 113 65 -113 4-Chloroaniline ND 2550 1350 ug/Kg 53 28 - 93 M 4-Chlorophenyl phenyl ether ND 2550 2510 ug/Kg 99 57 -122 4-Nitrophenol ND 5100 4890 ug/Kg 96 59-128 4-Nitroaniline ND 2550 2600 ug/Kg 102 50-121 Acenaphthene ND 2550 2540 ug/Kg 100 49-130 Benzo[k]fluoranthene ND *+ 2550 2400 ug/Kg 94 68 -119 Anthracene ND 2550 2600 ug/Kg 102 66-112 Acetophenone ND 2550 1900 ug/Kg 75 42 - 97 Acenaphthylene ND 2550 2500 ug/Kg 98 57 -118 III Benzo[a]anthrace ne 36 J F1 *+ 2550 3000 F1 ug/Kg 116 64 -114 Benzo[b]fluoranthene 200 J *+ 2550 2780 ug/Kg 101 66 -114 Benzo[g,h,i]perylene ND 2550 2560 ug/Kg 100 66-112 Benzo[a]pyrene 90 J 2550 2500 ug/Kg 95 67 -110 Benzyl alcohol ND 2550 2520 ug/Kg 99 57 -108 Bis(2-chloroethoxy)methane ND *+ 2550 2460 ug/Kg 96 58.106 Bis(2-chloroethyl)ether ND *+ 2550 2190 ug/Kg 86 58-110 Bis(2-ethylhexyl)phthalate ND F1*+ 2550 3200 F1 ug/Kg 126 63-115 Butyl benzyl phthalate ND F1 *+ 2550 3150 F1 ug/Kg 124 63 -116 Carbazole ND 2550 2750 ug/Kg 108 67-112 Chrysene 36 J 2550 2580 ug/Kg 100 66 -116 Dibenz(a,h)anthracene ND F1 *+ 2550 2830 F1 ug/Kg 111 67 -108 Di-n-butyl phthalate ND F1 *+ 2550 2960 F1 ug/Kg 116 68 - 111 Di-n-octyl phthalate ND F1 2550 3530 F1 ug/Kg 139 59 -113 Dibenzofuran ND 2550 2600 ug/Kg 102 57-122 Diethyl phthalate ND 2550 2670 ug/Kg 105 62 -124 Dimethyl phthalate ND 2550 2620 ug/Kg 103 61 -123 Fluoranthene ND 2550 2730 ug/Kg 107 67-111 Fluorene ND 2550 2560 ug/Kg 100 49-133 Hexachlorobenzene ND 2550 2620 ug/Kg 103 64 -112 Hexachlorobutadiene ND 2550 2210 ug/Kg 87 57-104 Hexachlorocyclopentadiene ND *+ 5110 2960 ug/Kg 58 49-102 Hexachloroethane ND 2550 1950 ug/Kg 77 54-103 Indeno[1,2,3-cd]pyrene ND F1 2550 3020 F1 ug/Kg 118 54-114 Isophorone ND 2550 2300 ug/Kg 90 55-100 N-Nitrosodi-n-propylamine ND 2550 2320 ug/Kg 91 56-108 N-Nitrosodiphenylamine ND F1 *+ 2550 2660 F1 ug/Kg 104 67-102 Pentachlorophenol ND 5100 4630 ug/Kg 91 54-112 i Phenanthrene ND 2550 2640 ug/Kg 104 63-117 Phenol ND 2550 2470 ug/Kg 97 56-113 Pyrene 29 J 2550 2760 ug/Kg 107 62 -118 Eurofins Denver Page 95 of 160 6/1/2023 QC Sample Results Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon Method: 8270D - S volatile Organic Compounds (GC/MS) (Continued) Lab Sample ID: 280-176200-15 MS Matrix: Solid Analysis Batch: 612910 Analyte 1,4-Dichlorobenzene Naphthalene 2-Methylnaphthalene Nitrobenzene 3,3'-Dichlorobenzidine 3 & 4 Methylphenol 1,1'-Biphenyl 1,2,4,5-Tetrachlorobenzene 1,3-Dinitrobenzene 1-Methylnaphthalene 2,3,4,6-Tetrachlorophenol 2,6-Dichlorophenol 2,6-Dinitrotoluene Aniline Azobenzene Benzaldehyde Benzidine Caprolactam Diphenylamine N-N itrosod imethyla m ine Pyridine Hexadecane 1,2-Diphenylhydrazine(as Azobenzene) 3-Methylphenol 4-Methylphenol Benzoic acid Famphur Sample Sample Result Qualifier Spike Added MS MS Result Qualifier Unit ND 2550 2020 ug/Kg ND 2550 2300 ug/Kg ND 2550 2300 ug/Kg ND 2550 2150 ug/Kg ND *- 5100 3580 ug/Kg ND 2550 2700 ug/Kg ND 2550 2510 ug/Kg ND 2550 2390 ug/Kg ND 2550 2730 ug/Kg ND 2550 2410 ug/Kg ND 2550 2790 ug/Kg ND 2550 2580 ug/Kg ND 2550 2700 ug/Kg ND F2 *- 2550 986 ug/Kg ND 2550 2520 ug/Kg ND 2550 1930 ug/Kg ND F1 5100 ND F1 ug/Kg ND F1 2550 1480 ug/Kg ND 2170 2220 ug/Kg ND 2550 1980 ug/Kg ND *- 5100 1710 ug/Kg ND 2550 2490 ug/Kg ND 2580 2550 ug/Kg Client Sample ID: DU01-230504-0.5 Prep Type: Total/NA Prep Batch: 612492 %Rec D %Rec Limits 79 54-105 90 59-106 90 55-113 84 57 -105 70 49-103 106 54-114 99 53-122 94 53-112 107 63-128 95 95 60 -11010 � 109 60-126 101 55-113 106 58-126 39 24-91 99 60-118 76 10-91 0 5-55 58 57-104 102 61-122 78 50 -102 34 32 - 79 98 54-115 99 60-118 ND 2550 2700 ug/Kg 106 54-114 ND 2550 2700 ug/Kg 106 54-114 ND F2 F1 *- 2550 368 J F1 ug/Kg 14 43-115 ND F1 2550 2810 F1 ug/Kg 110 19-95 MS MS Surrogate %Recovery Qualifier Limits 2-Fluorobiphenyl 98 33- 135 2-Fluorophenol (Surr) 95 39 - 135 2, 4, 6-Tribromophenol (Surr) 109 24 - 135 Nitrobenzene-d5 (Surr) 93 32- 135 Phenol-d5 (Surr) 104 39 - 135 Terphenyl-d14 (Surr) ill 30- 135 Lab Sample ID: 280-176200-15 MSD Matrix: Solid Analysis Batch: 612910 Sample Sample Spike MSD MSD Analyte Result Qualifier Added Result Qualifier Unit 1,2,4-Trichoorobenzene ND 2650 2410 ug/Kg 1,2-Dichlorobenzene ND 2650 2170 ug/Kg 1,3-Dichlorobenzene ND 2650 2240 ug/Kg 2,2'-oxybis[1-chloropropane] ND 2650 2080 ug/Kg 2,4,5-Trichlorophenol ND 2650 2890 ug/Kg 2,4,6-Trichlorophenol ND 2650 2920 ug/Kg 2,4-Dimethylphenol ND 2650 2610 ug/Kg Client Sample ID: D1.101-230504-0.5 Prep Type: Total/NA Prep Batch: 612492 %Rec RPD D %Rec Limits RPD Limit 91 57-105 8 30 82 55-106 2 30 85 54-104 5 30 78 52 -110 4 30 109 55-126 3 30 110 55-135 4 30 99 60 -111 8 30 Eurofins Denver Page 96 of 160 6/1/2023 QC Sample Results Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon Method: 8270D - Semivolatile Organic Compounds (GC/MS) (Continued) Lab Sample ID: 280-176200-15 MSD Client Sample ID: DIJ01-230504-0.5 Matrix: Solid Prep Type: Total/NA Analysis Batch: 612910 Prep Batch: 612492 Sample Sample Spike MSD MSD %Rec RPD Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits RPD Limit 2,4-Dinitrotoluene ND 2650 2810 ug/Kg 106 59-127 3 30 2,4-Dinitrophenol ND F1*+ 5300 1480 JF1 ug/Kg 28 49-111 17 30 2,4-Dichlorophenol ND 2650 2720 ug/Kg 103 54-114 2 30 2-Chlorophenol ND 2650 2610 ug/Kg 99 58-110 7 30 2-Chloronaphthalene ND F1 2650 3230 F1 ug/Kg 122 53 -121 4 30 2-Nitrophenol ND 2650 2640 ug/Kg 100 59-109 8 30 2-Methylphenol ND 2650 2660 ug/Kg 100 57-112 6 30 2-Nitroaniline ND 2650 2750 ug/Kg 104 59-123 3 30 3-Nitroaniline ND 2650 2750 ug/Kg 104 39-107 12 30 4,6- Din itro-2-methylphenol ND F1 5300 2810 F1 ug/Kg 53 60-109 4 30 m 4-Bromophenyl phenyl ether ND 2650 2810 ug/Kg 106 65-111 5 30 4-Chloro-3-methylphenol ND *+ 2650 2960 ug/Kg 112 65-113 3 30 4-Chloroaniline ND 2650 1730 ug/Kg 65 28-93 25 30 4-Chlorophenyl phenyl ether ND 2650 2560 ug/Kg 97 57 -122 2 30 4-Nitrophenol ND 5300 4940 ug/Kg 93 59-128 1 30 4-Nitroaniline ND 2650 2640 ug/Kg 100 50-121 2 30 Acenaphthene ND 2650 2600 ug/Kg 98 49-130 3 30 Benzo[k]fluoranthene ND *+ 2650 2560 ug/Kg 97 68-119 7 30 Anthracene ND 2650 2760 ug/Kg 104 66-112 6 30 Acetophenone ND 2650 2080 ug/Kg 78 42 - 97 9 30 Acenaphthylene ND 2650 2570 ug/Kg 97 57-118 3 30 Benzo[a]anthracene 36 JF1*+ 2650 3240 F1 ug/Kg 121 64-114 8 30 Benzo[b]fluoranthene 200 J *+ 2650 3060 ug/Kg 108 66-114 9 30 Benzo[g,h,i]perylene ND 2650 2780 ug/Kg 105 66-112 8 30 Benzo[a]pyrene 90 J 2650 2670 ug/Kg 97 67 -110 6 30 Benzyl alcohol ND 2650 2680 ug/Kg 101 57-108 6 30 Bis(2-chloroethoxy)methane ND *+ 2650 2630 ug/Kg 99 58-106 7 30 Bis(2-chloroethyl)ether ND *+ 2650 2290 ug/Kg 86 58-110 4 30 Bis(2-ethylhexyl)phthalate ND F1 *+ 2650 3340 F1 ug/Kg 126 63-115 4 30 Butyl benzyl phthalate ND F1 *+ 2650 3250 F1 ug/Kg 123 63 -116 3 30 Carbazole ND 2650 2820 ug/Kg 106 67 - 112 3 30 Chrysene 36 J 2650 2770 ug/Kg 103 66 - 116 7 30 Dibenz(a,h)anthracene ND F1 *+ 2650 3040 F1 ug/Kg 115 67-108 7 30 j Di-n-butyl phthalate ND F1 *+ 2650 3050 F1 ug/Kg 115 68-111 3 30 Di-n-octyl phthalate ND F1 2650 3710 F1 ug/Kg 140 59 - 113 5 30 Dibenzofuran ND 2650 2650 ug/Kg 100 57-122 2 30 Diethyl phthalate ND 2650 2690 ug/Kg 102 62-124 1 30 Dimethyl phthalate ND 2650 2720 ug/Kg 103 61 -123 4 30 Fluoranthene ND 2650 2820 ug/Kg 106 67-111 3 30 Fluorene ND 2650 2610 ug/Kg 99 49-133 2 30 Hexachlorobenzene ND 2650 2720 ug/Kg 103 64-112 4 30 Hexachlorobutadiene ND 2650 2380 ug/Kg 90 57-104 7 30 Hexachlorocyclopentadiene ND *+ 5310 3140 ug/Kg 59 49 -102 6 30 Hexachloroethane ND 2650 2040 ug/Kg 77 54 -103 4 30 Indeno[1,2,3-cd]pyrene ND F1 2650 3330 F1 ug/Kg 126 54-114 10 30 Isophorone ND 2650 2470 ug/Kg 93 55-100 7 30 N-Nitrosodi-n-propylamine ND 2650 2520 ug/Kg 95 56-108 8 30 N-Nitrosodiphenylamine ND F1 *+ 2650 2810 F1 ug/Kg 106 67-102 5 30 Pentachlorophenol ND 5300 4720 ug/Kg 89 54 -112 2 30 Eurofins Denver Page 97 of 160 6/1/2023 QC Sample Results Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon Method: 8270D - Semivolatile Organic Compounds (GC/MS) (Continued) Lab Sample ID: 280-176200-15 MSD Matrix: Solid Analysis Batch: 612910 Analyte Phenanthrene Phenol Pyrene 1,4-Dichlorobenzene Naphthalene 2-Methylnaphthalene Nitrobenzene 3,3'-Dichlorobenzid i ne 3 & 4 Methylphenol 1,1'-Biphenyl 1,2,4,5-Tetrachlorobenzene 1,3-Dinitrobenzene 1-Methylnaphthalene 2,3,4,6-Tetrachlorophenol 2,6-Dichlorophenol 2,6-Dinitrotoluene Aniline Azobenzene Benzaldehyde Benzidine Caprolactam Diphenylamine N-N itrosod imethylamine Pyridine Hexadecane 1,2-Diphenylhydrazine(as Azobenzene) 3-Methylphenol 4-Methylphenol Benzoic acid Famphur Surrogate 2-Fluorobiphen yl 2-Fluorophenol (Surr) 2,4,6-Tribromophenol (Surr) Nitrobenzene-d5 (Surr) Phenol-d5 (Surr) Terphenyl-d14 (Surr) Sample Sample Result Qualifier Spike Added MSD MSD Result Qualifier Unit ND 2650 2720 ug/Kg ND 2650 2630 ug/Kg 29 J 2650 2960 ug/Kg ND 2650 2140 ug/Kg ND 2650 2480 ug/Kg ND 2650 2480 ug/Kg ND 2650 2290 ug/Kg ND *- 5300 4230 ug/Kg ND 2650 2880 ug/Kg ND 2650 2600 ug/Kg ND 2650 2510 ug/Kg ND 2650 2760 ug/Kg ND 2650 2550 ug/Kg ND 2650 2810 ug/Kg ND 2650 2720 ug/Kg ND 2650 2760 ug/Kg ND F2 *- 2650 1490 F2 ug/Kg ND 2650 2560 ug/Kg ND 2650 2190 ug/Kg ND F1 5300 1110 J ug/Kg ND F1 2650 2000 ug/Kg ND 2250 2240 ug/Kg ND 2650 2090 ug/Kg ND *- 5300 2010 ug/Kg ND 2650 2550 ug/Kg ND 2680 2590 ug/Kg Client Sample ID: DU01-230504-0.5 Prep Type: Total/NA Prep Batch: 612492 %Rec RPD D %Rec Limits RPD Limit 103 63-117 3 30 99 56-113 6 30 111 62 -118 7 30 81 54 -105 6 30 94 59 -106 8 30 94 55 -113 8 30 87 57-105 7 30 80 49-103 17 30 109 54-114 6 30 98 53-122 3 30 m 95 53 -112 5 30 104 63-128 1 30 96 60 -110 6 30 106 60-126 1 30 103 55-113 5 30 104 58-126 2 30 56 24-91 41 31 97 60 -118 2 30 83 10-91 13 30 21 5 - 55 NC 50 76 57-104 30 30 100 61-122 1 30 79 50 -102 5 30 38 32 - 79 16 30 96 54 -115 2 30 97 60 -118 2 30 ND 2650 2880 ug/Kg 109 54-114 6 30 ND 2650 2880 ug/Kg 109 54-114 6 30 ND F2 F1 *- 2650 545 J F2 F1 ug/Kg 21 43 -115 39 30 ND F1 2650 2850 F1 ug/Kg 107 19-95 1 30 MSD MSD %Recovery Qualifier Limits 99 33 - 135 99 39-135 99 24-135 97 32-135 106 39-135 111 30-135 Method: 8270D SIM - Semivolatile Organic Compounds (GC/MS SIM) Lab Sample ID: MB 280-611929/1-A Client Sample ID: Method Blank Matrix: Water Prep Type: Total/NA Analysis Batch: 612138 Prep Batch: 611929 MB MB Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 2-Methyl naphthalene ND 0.10 0.021 ug/L 05/10/2310:33 05/11/2313:41 1 Acenaphthene ND 0.10 0.0042 ug/L 05/10/2310:33 05/11/2313:41 1 Eurofins Denver Page 98 of 160 6/1/2023 QC Sample Results Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon Method: 8270D SIM - Semivolatile Organic Compounds (GC/MS SIM) (Continued) Lab Sample ID: MB 280-611929/1-A Client Sample ID: Method Blank Matrix: Water Prep Type: Total/NA Analysis Batch: 612138 Prep Batch: 611929 MB MB Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Acenaphthylene ND 0.10 0.0051 ug/L 05/10/2310:33 05/11/2313:41 1 Benzo[a]anthrace ne ND 0.10 0.028 ug/L 05/10/2310:33 05/11/2313:41 1 Benzo[a]pyrene ND 0.10 0.025 ug/L 05/10/2310:33 05/11/2313:41 1 Benzo[b]fluoranthene ND 0.10 0.040 ug/L 05/10/2310:33 05/11/2313:41 1 Benzo[g,h,i]perylene ND 0.10 0.037 ug/L 05/10/2310:33 05/11/2313:41 1 Benzo[k]fluoranthene ND 0.10 0.023 ug/L 05/10/2310:33 05/11/2313:41 1 Chrysene ND 0.10 0.033 ug/L 05/10/2310:33 05/11/2313:41 1 Dibenz(a,h)anthracene ND 0.10 0.028 ug/L 05/10/2310:33 05/11/2313:41 1 Fluoranthene ND 0.10 0.049 ug/L 05/10/2310:33 05/11/2313:41 1 Fluorene ND 0.10 0.019 ug/L 05/10/2310:33 05/11/2313:41 1 m Indeno[1,2,3-cdjpyrene ND 0.10 0.039 ug/L 05/10/2310:33 05/11/2313:41 1 Naphthalene ND 0.10 0.023 ug/L 05/10/2310:33 05/11/2313:41 1 Phenanthrene ND 0.10 0.049 ug/L 05/10/2310:33 05/11/2313:41 1 Pyrene ND 0.10 0.045 ug/L 05/10/2310:33 05/11/2313:41 1 Anthracene ND 0.10 0.031 ug/L 05/10/2310:33 05/11/2313:41 1 1-Methylnaphthalene ND 0.10 0.018 ug/L 05/10/2310:33 05/11/2313:41 1 MB MB Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 2-Fluorobiphenyl 77 26-114 05110123 10:33 05111123 13:41 1 Nitrobenzene-d5 75 18-126 05/10/23 10:33 05111123 13.41 1 Terphenyl-d14 86 36-131 05110123 10.33 05111123 13.41 1 Lab Sample ID: LCS 280-611929/2-A Client Sample ID: Lab Control Sample Matrix: Water Prep Type: Total/NA Analysis Batch: 612138 Prep Batch: 611929 Spike LCS LCS %Rec Analyte Added Result Qualifier Unit D %Rec Limits 2-Methylnaphthalene 0.900 0.454 ug/L 50 36-121 Acenaphthene 0.900 0.489 ug/L 54 47 -120 Acenaphthylene 0.900 0.489 ug/L 54 39 -120 Benzo[a]anthracene 0.900 0.554 ug/L 62 42 - 120 Benzo[a]pyrene 0.900 0.517 ug/L 57 38 -120 Benzo[b]fluoranthene 0.900 0.536 ug/L 60 44 -120 Benzo[g,h,i]perylene 0.900 0.500 ug/L 56 39-120 Benzo[k]fluoranthene 0.900 0.537 ug/L 60 43 -120 Chrysene 0.900 0.535 ug/L 59 35-120 Dibenz(a,h)anth racene 0.900 0.508 ug/L 56 27 -126 Fluoranthene 0.900 0.695 ug/L 77 46 -120 Fluorene 0.900 0.554 ug/L 62 49 -120 Indeno[1,2,3-cd]pyrene 0.900 0.514 ug/L 57 38 -120 Naphthalene 0.900 0.417 ug/L 46 37-120 Phenanthrene 0.900 0.542 ug/L 60 46-120 Pyrene 0.900 0.719 ug/L 80 49-120 Anthracene 0.900 0.522 ug/L 58 28-120 1-Methylnaphthalene 0.900 0.445 ug/L 49 44-150 LCS LCS Surrogate %Recovery Qualifier Limits 2-Fluorobiphenyl 56 26- 114 Eurofins Denver Page 99 of 160 6/1/2023 QC Sample Results Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon Method: 8270D SIM - Semivolatile Organic Compounds (GC/MS SIM) (Continued) Lab Sample ID: LCS 280-611929/2-A Client Sample ID: Lab Control Sample Matrix: Water Prep Type: Total/NA Analysis Batch: 612138 Prep Batch: 611929 LCS LCS Surrogate %Recovery Qualifier Limits Nitrobenzene-d5 49 18- 126 Terphenyl-d14 97 36- 131 F Lab Sample ID: 280-176115-A-2-B MS Client Sample ID: Matrix Spike Matrix: Water Prep Type: Total/NA Analysis Batch: 612138 Prep Batch: 611929 Sample Sample Spike MS MS %Rec Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits 2- Methyl naphthalene 0.065 J 0.983 0.480 ug/L 42 36-121 Acenaphthene 0.10 JF1 0.983 0.515 F1 ug/L 42 47-120 m Acenaphthylene 0.061 J 0.983 0.508 ug/L 45 39-120 Benzo[a]anthracene 0.48 F1 0.983 0.576 F1 ug/L 10 42 -120 Benzo[a]pyrene 0.45 F1 0.983 0.535 F1 ug/L 9 38-120 Benzo[b]fluoranthene 0.56 F1 0.983 0.563 F1 ug/L 0.2 44-120 Benzo[g,h,i]perylene 0.56 F1 0.983 0.528 F1 ug/L -3 39-120 Benzo[k]fluoranthene 0.54 F1 0.983 0.551 F1 ug/L 1 43-120 Chrysene 0.52 F1 0.983 0.568 F1 ug/L 5 35-120 Dibenz(a,h)anth racene 0.53 F1 0.983 0.524 F1 ug/L -0.7 27-126 Fluoranthene 0.44 F1 0.983 0.628 F1 ug/L 19 46-120 Fluorene 0.14 F1 0.983 0.514 F1 ug/L 38 49 -120 Indeno[1,2,3-cd]pyrene 0.57 F1 0.983 0.522 F1 ug/L -5 38-120 Naphthalene 0.044 J 0.983 0.474 ug/L 44 37-120 Phenanthrene 0.26 F1 0.983 0.564 F1 ug/L 31 46-120 Pyrene 0.46 F1 0.983 0.630 F1 ug/L 18 49-120 Anthracene 0.25 0.983 0.552 ug/L 31 28 -120 1-Methylnaphthalene 0.070 J F1 0.983 0.482 F1 ug/L 42 44-150 MS MS Surrogate %Recovery Qualifier Limits 2-Fluorobiphenyl 54 26-114 Nitrobenzene-d5 51 18-126 Terphenyl-04 76 36-131 Lab Sample ID: 280-176115-A-2-C MSD Client Sample ID: Matrix Spike Duplicate Matrix: Water Prep Type: Total/NA Analysis Batch: 612138 Prep Batch: 611929 Sample Sample Spike MSD MSD %Rec RPD Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits RPD Limit 2- Methyl naphthalene 0.065 J 1.03 0.480 ug/L 40 36 -121 0 30 Acenaphthene 0.10 J F1 1.03 0.548 F1 ug/L 43 47 -120 6 50 Acenaphthylene 0.061 J 1.03 0.550 ug/L 47 39 -120 8 50 Benzo[a]anthracene 0.48 F1 1.03 0.670 F1 ug/L 18 42 -120 15 40 Benzo[a]pyrene 0.45 F1 1.03 0.631 F1 ug/L 18 38-120 16 21 Benzo[b]fluoranthene 0.56 F1 1.03 0.662 F1 ug/L 10 44-120 16 28 Benzo[g,h,i]perylene 0.56 F1 1.03 0.615 F1 ug/L 6 39-120 15 23 Benzo[k]fluoranthene 0.54 F1 1.03 0.649 F1 ug/L 11 43-120 16 28 Chrysene 0.52 F1 1.03 0.673 F1 ug/L 15 35-120 17 41 Dibenz(a,h)anth race ne 0.53 F1 1.03 0.632 F1 ug/L 10 27-126 19 25 Fluoranthene 0.44 F1 1.03 0.728 F1 ug/L 28 46-120 15 24 Eurofins Denver Page 100 of 160 6/1/2023 QC Sample Results Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Job ID: 280-176200-1 _ - --- --- Method: 8270D SIM - Semivolatile Organic Compounds (GC/MS SIM) (Continued) . ... Lab Sample ID: 280-176115-A-2-C MSD Client Sample ID: Matrix Spike Duplicate Matrix: Water Prep Type: Total/NA Analysis Batch: 612138 Prep Batch: 611929 Sample Sample Spike MSD MSD %Rec RPD Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits RPD Limit Fluorene 0.14 F1 1.03 0.578 F1 ug/L 43 49-120 12 50 Indeno[1,2,3-cd]pyrene 0.57 F1 1.03 0.622 F1 ug/L 5 38-120 18 25 Naphthalene 0.044 J 1.03 0.465 ug/L 41 37-120 2 50 Phenanthrene 0.26 F1 1.03 0.635 F1 ug/L 36 46-120 12 42 Pyrene 0.46 F1 1.03 0.734 F1 ug/L 27 49 -120 15 22 Anthracene 0.25 1.03 0.620 ug/L 36 28 -120 12 50 1-Methylnaphthalene 0.070 J F1 1.03 0.484 F1 ug/L 40 44 -150 0 50 MSD MSD Surrogate %Recovery Qualifier Limits 2-Fluorobiphenyl 55 26- 114 Nitrobenzene-d5 52 18- 126 Terphenyl-d14 83 36- 131 Lab Sample ID: MB 280-612087/1-A Client Sample ID: Method Blank Matrix: Water Prep Type: Total/NA Analysis Batch: 612216 Prep Batch: 612087 MB MB Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 2-Methylnaphthalene 0.0634 J 0.10 0.021 ug/L 05/11/2313:50 05/1212310:30 1 Acenaphthene 0.0592 J 0.10 0.0042 ug/L 05/11/2313:50 05/12/2310:30 1 Acenaphthylene 0.0443 J 0.10 0.0051 ug/L 05/11/2313:50 05/12/2310:30 1 Benzo[a]anthracene 0.0549 J 0.10 0.028 ug/L 05/11/2313:50 05/12/2310:30 1 Benzo[a]pyrene 0.0443 J 0.10 0.025 ug/L 05/11/2313:50 05/12/2310:30 1 Benzo[b]fluoranthene 0.0485 J 0.10 0.040 ug/L 05/11/2313:50 05/12/2310:30 1 Benzo[g,h,i]perylene 0.0507 J 0.10 0.037 ug/L 05/11/2313:50 05/12/2310:30 1 Benzo[k]fluoranthene 0.0477 J 0.10 0.023 ug/L 05/11/2313:50 05/12/2310:30 1 Chrysene 0.0516 J 0.10 0.033 ug/L 05/11/2313:50 05/12/2310:30 1 Dibenz(a,h)anthrace ne 0.0484 J 0.10 0.028 ug/L 05/11/2313:50 05/12/2310:30 1 Fluoranthene 0.0610 J 0.10 0.049 ug/L 05/11/2313:50 05/12/2310:30 1 Fluorene 0.0600 J 0.10 0.019 ug/L 05/11/2313:50 05/12/2310:30 1 Indeno[1,2,3-cd]pyrene 0.0446 J 0.10 0.039 ug/L 05111/2313:50 05/12/2310:30 1 Naphthalene 0.0628 J 0.10 0.023 ug/L 05/11/2313:50 05/12/2310:30 1 Phenanthrene 0.0588 J 0.10 0.049 ug/L 05/11/2313:50 05/12/2310:30 1 Pyrene 0.0589 J 0.10 0.045 ug/L 05/11/2313:50 05/12/2310:30 1 Anthracene 0.0555 J 0.10 0.031 ug/L 05/11/2313:50 05/12/2310:30 1 1-Methyl naphtha lene 0.0645 J 0.10 0.018 ug/L 05/11/2313:50 05/12/2310:30 1 MB MB Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 2-Fluorobiphenyl 59 26-114 05111123 13:50 05112123 10,30 1 Nitrobenzene-d5 62 18-126 05111123 13:50 05112123 10:30 1 Terphenyl-d14 68 36-131 05/11/23 13:50 05/12/23 10.30 1 Lab Sample ID: LCS 280-612087/2-A Client Sample ID: Lab Control Sample Matrix: Water Prep Type: Total/NA Analysis Batch: 612216 Prep Batch: 612087 Spike LCS LCS %Rec Analyte Added Result Qualifier Unit D %Rec Limits 2-Methylnaphthalene 0.900 0.463 ug/L 51 36 -121 Eurofins Denver Page 101 of 160 6/1/2023 QC Sample Results Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon Method: 8270D SIM - Semivolatile Organic Compounds (GC/MS SIM) (Continued) Lab Sample ID: LCS 280-612087/2-A Client Sample ID: Lab Control Sample Matrix: Water Prep Type: Total/NA Analysis Batch: 612216 Prep Batch: 612087 Spike LCS LCS %Rec Analyte Added Result Qualifier Unit D %Rec Limits Acenaphthene 0.900 0.505 ug/L 56 47-120 Acenaphthylene 0.900 0.389 ug/L 43 39 -120 Benzo[a]anthracene 0.900 0.496 ug/L 55 42 -120 Benzo[a]pyrene 0.900 0.436 ug/L 48 38 -120 Benzo[b]fluoranthene 0.900 0.476 ug/L 53 44 -120 Benzo[g,h,i]perylene 0.900 0.411 ug/L 46 39-120 Benzo[k]fluoranthene 0.900 0.468 ug/L 52 43 -120 Chrysene 0.900 0.487 ug/L 54 35-120 Dibenz(a,h)anthracene 0.900 0.412 ug/L 46 27-126 Fluoranthene 0.900 0.537 ug/L 60 46 -120 m Fluorene 0.900 0.556 ug/L 62 49 -120 Indeno[1,2,3-cd]pyrene 0.900 0.416 ug/L 46 38-120 Naphthalene 0.900 0.461 ug/L 51 37 -120 Phenanthrene 0.900 0.520 ug/L 58 46 -120 Pyrene 0.900 0.522 ug/L 58 49 -120 Anthracene 0.900 0.507 ug/L 56 28-120 1-Methylnaphthalene 0.900 0.479 ug/L 53 44-150 LCS LCS Surrogate %Recovery Qualifier Limits 2-Fluorobiphenyl 57 26- 114 Nitrobenzene-d5 57 18- 126 Terphenyl-d14 64 36- 131 Lab Sample ID: LCSD 280-612087/3-A Client Sample ID: Lab Control Sample Dup Matrix: Water Prep Type: Total/NA Analysis Batch: 612216 Prep Batch: 612087 Spike LCSD LCSD %Rec RPD Analyte Added Result Qualifier Unit D %Rec Limits RPD Limit 2-Methyl naphthalene 0.900 0.498 ug/L 55 36 -121 7 30 Acenaphthene 0.900 0.549 ug/L 61 47-120 8 50 Acenaphthylene 0.900 0.423 ug/L 47 39-120 9 50 Benzo[a]anthracene 0.900 0.519 ug/L 58 42-120 5 40 Benzo[a]pyrene 0.900 0.453 ug/L 50 38-120 4 21 Benzo[b]fluoranthene 0.900 0.488 ug/L 54 44 -120 2 28 Benzo[g,h,i]perylene 0.900 0.424 ug/L 47 39-120 3 23 Benzo[k]fluoranthene 0.900 0.482 ug/L 54 43-120 3 28 Chrysene 0.900 0.515 ug/L 57 35 -120 5 41 Dibenz(a,h)anthracene 0.900 0.430 ug/L 48 27 -126 4 25 Fluoranthene 0.900 0.570 ug/L 63 46-120 6 24 Fluorene 0.900 0.596 ug/L 66 49-120 7 50 Indeno[1,2,3-cd]pyre ne 0.900 0.429 ug/L 48 38-120 3 25 Naphthalene 0.900 0.486 ug/L 54 37-120 5 50 Phenanthrene 0.900 0.550 ug/L 61 46-120 6 42 Pyrene 0.900 0.557 ug/L 62 49 -120 6 22 Anthracene 0.900 0.531 ug/L 59 28 -120 5 50 1-Methylnaphthalene 0.900 0.513 ug/L 57 44-150 7 50 Eurofins Denver Page 102 of 160 6/1/2023 QC Sample Results Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon Method: 8270D SIM - Semivolatile Orqanic Compounds (GC/MS SIM) (Continued) Lab Sample ID: LCSD 280-612087/3-A Matrix: Water Analysis Batch: 612216 LCSD LCSD Surrogate %Recovery Qualifier Limits 2-Fluorobiphenyl 58 26- 114 Nitrobenzene-d5 61 18 - 126 Terphenyl-d14 68 36- 131 Lab Sample ID: 280-176284-E-4-A MS Matrix: Water Analysis Batch: 612216 Client Sample ID: Lab Control Sample Dup Prep Type: Total/NA Prep Batch: 612087 Analyte Sample Sample Result Qualifier Spike Added MS MS Result Qualifier Unit 2-Methylnaphthalene ND 0.843 0.391 ug/L Acenaphthene 0.0053 J B 0.843 0.427 ug/L Acenaphthylene ND F1 0.843 0.310 F1 ug/L Benzo[a]anthracene ND 0.843 0.406 ug/L Benzo[a]pyrene ND 0.843 0.352 ug/L Benzo[b]fluoranthene ND 0.843 0.374 ug/L Benzo[g,h,i]perylene ND 0.843 0.329 ug/L Benzo[b]fluoranthene ND 0.843 0.364 ug/L Chrysene ND 0.843 0.400 ug/L Dibenz(a,h)anthracene ND 0.843 0.330 ug/L Fluoranthene ND F2 0.843 0.435 ug/L Fluorene ND 0.843 0.472 ug/L Indeno[1,2,3-cd]pyrene ND F1 0.843 0.314 F1 ug/L Naphthalene ND 0.843 0.376 ug/L Phenanthrene ND 0.843 0.424 ug/L Pyrene ND F2 0.843 0.430 ug/L Anthracene ND 0.843 0.413 ug/L 1-Methylnaphthalene ND 0.843 0.396 ug/L MS MS Surrogate %Recovery Qualifier Limits 2-Fluorobiphenyl 51 26- 114 Nitrobenzene-d5 51 18 -126 Terphenyl-d14 57 36- 131 Lab Sample ID: 280-176284-E-4-B MSD Matrix: Water Analysis Batch: 612216 Analyte Sample Sample Result Qualifier Spike Added MSD MSD Result Qualifier 2-Methyl naphthalene ND 0.831 0.408 Acenaphthene 0.0053 J B 0.831 0.494 Acenaphthylene ND F1 0.831 0.352 Benzo[a]anthracene ND 0.831 0.462 Benzo[a]pyrene ND 0.831 0.423 Benzo[b]fluoranthene ND 0.831 0.443 Benzo[g,h,i]perylene ND 0.831 0.397 Benzo[k]fluoranthene ND 0.831 0.435 Chrysene ND 0.831 0.461 Dibenz(a,h)anthracene ND 0.831 0.403 Client Sample ID: Matrix Spike Prep Type: Total/NA Prep Batch: 612087 %Rec D %Rec Limits m 46 36-121 50 47 -120 37 39 -120 48 42-120 42 38-120 44 44 - 120 39 39-120 43 43-120 48 35 -120 39 27 -126 52 46-120 56 49-120 37 38-120 45 37-120 50 46 -120 51 49-120 49 28-120 47 44-150 Client Sample ID: Matrix Spike Duplicate Prep Type: Total/NA Prep Batch: 612087 %Rec RPD Unit D %Rec Limits RPD Limit ug/L 49 36-121 4 30 ug/L 59 47 -120 15 50 ug/L 42 39 -120 13 50 ug/L 56 42 -120 13 40 ug/L 51 38 -120 18 21 ug/L 53 44 -120 17 28 ug/L 48 39 -120 19 23 ug/L 52 43-120 18 28 ug/L 56 35-120 14 41 ug/L 49 27 -126 20 25 Eurofins Denver Page 103 of 160 6/1/2023 QC Sample Results Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon Method: 8270D SIM - Semivolatile Organic Compounds (GC/MS SIM) (Continued) Lab Sample ID: 280-176284-E-4-B MSD Client Sample ID: Matrix Spike Duplicate Matrix: Water Prep Type: Total/NA Analysis Batch: 612216 Prep Batch: 612087 Sample Sample Spike MSD MSD %Rec RPD Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits RPD Limit Fluoranthene ND F2 0.831 0.602 F2 ug/L 72 46-120 32 24 Fluorene ND 0.831 0.553 ug/L 67 49-120 16 50 Indeno[1,2,3-cd]pyrene ND F1 0.831 0.374 ug/L 45 38-120 18 25 Naphthalene ND 0.831 0.382 ug/L 46 37 -120 2 50 Phenanthrene ND 0.831 0,495 ug/L 60 46 -120 15 42 Pyrene ND F2 0.831 0.615 F2 ug/L 74 49-120 36 22 Anthracene ND 0.831 0.474 ug/L 57 28-120 14 50 1-Methylnaphthalene ND 0.831 0.418 ug/L 50 44-150 6 50 MSD MSD m Surrogate %Recovery Qualifier Limits 2-Fluorobiphenyl 54 26- 114 Nitrobenzene-d5 49 18- 126 LTerphenyl-d14 83 36- 131 Lab Sample ID: MB 280-612097/1-A Client Sample ID: Method Blank Matrix: Solid Prep Type: Total/NA Analysis Batch: 612600 Prep Batch: 612097 MB MB Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 2-Methylnaphthalene ND 10 0.62 ug/Kg 05/11/2312:12 05/16/2310:34 1 Acenaphthene ND 10 0.92 ug/Kg 05/11/2312:12 05/16/2310:34 1 Acenaphthylene ND 10 0.78 ug/Kg 05/11/2312:12 05/16/2310:34 1 Benzo[a]anthracene ND 10 1.8 ug/Kg 05/11/2312:12 05/16/2310:34 1 Benzo[a]pyrene ND 10 1.5 ug/Kg 05/11/2312:12 05/16/2310:34 1 Benzo[b]fluoranthene ND 10 2.4 ug/Kg 05/11/2312:12 05/16/2310:34 1 Benzo[g,h,i]perylene ND 10 2.2 ug/Kg 05/11/2312:12 05/16/2310:34 1 Benzo[k]fluoranthene ND 10 2.0 ug/Kg 05/11/2312:12 05/16/2310:34 1 Chrysene ND 10 2.0 ug/Kg 05/11/2312:12 05116/2310:34 1 Dibenz(a,h)anthracene ND 10 2.6 ug/Kg 05/11/2312:12 05/16/2310:34 1 Fluoranthene ND 10 2.0 ug/Kg 05/11/2312:12 05/16/2310:34 1 Fluorene ND 10 0.94 ug/Kg 05/11/2312:12 05/16/2310:34 1 Indeno[1,2,3-cd]pyrene ND 10 2.2 ug/Kg 05/11/2312:12 05/16/2310:34 1 Naphthalene ND 10 0.65 ug/Kg 05/11/2312:12 05/16/2310:34 1 Phenanthrene ND 10 2.2 ug/Kg 05/11/2312:12 05/16/2310:34 1 Pyrene ND 10 2.2 ug/Kg 05/11/2312:12 05116/2310:34 1 Anthracene ND 10 1.4 ug/Kg 05/11/2312:12 05/16/2310:34 1 1- Methyl naphthalene ND 10 0.52 ug/Kg 05/11/2312:12 05/16/2310:34 1 MB MB Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 2-Fluorobiphenyl 67 42- 104 05111123 12.12 05116123 10:34 1 Nitrobenzene-d5 62 14- 139 05/11/23 12:12 05116123 10:34 1 Terphenyl-d14 119 46-125 05111123 12:12 05116123 10:34 1 Eurofins Denver Page 104 of 160 6/1/2023 QC Sample Results Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Method:8270D SIM - Semivolatile Organic Compounds (GC/MS SIM) (Continued) Job ID: 280-176200-1 Lab Sample ID: LCS 280-612097/2-A Client Sample ID: Lab Control Sample Matrix: Solid Prep Type: Total/NA Analysis Batch: 612600 Prep Batch: 612097 Spike LCS LCS %Rec Analyte Added Result Qualifier Unit D %Rec Limits 2-Methylnaphthalene 60.0 40.2 ug/Kg 67 30 -120 Acenaphthene 60.0 39.2 ug/Kg 65 35 -120 Acenaphthylene 60.0 37.6 ug/Kg 63 41 -120 Benzo[a]anthracene 60.0 43.5 ug/Kg 73 36 -120 Benzo[a]pyrene 60.0 42.9 ug/Kg 72 20-120 Benzo[b]fluoranthene 60.0 45.9 ug/Kg 77 37 -120 Benzo[g,h,i]perylene 60.0 43.1 ug/Kg 72 20-123 Benzo[k]fluoranthene 60.0 45.1 ug/Kg 75 46-120 Chrysene 60.0 41.6 ug/Kg 69 34 -120 m Dibenz(a,h)anthracene 60.0 44.8 ug/Kg 75 20-120 Fluoranthene 60.0 45.6 ug/Kg 76 45-120 Fluorene 60.0 42.1 ug/Kg 70 44-120 Indeno[1,2,3-cd]pyrene 60.0 43.5 ug/Kg 72 20-127 Naphthalene 60.0 39.6 ug/Kg 66 44-120 Phenanthrene 60.0 42.6 ug/Kg 71 44 -120 Pyrene 60.0 45.2 ug/Kg 75 43 -120 Anthracene 60.0 41.7 ug/Kg 69 43 -120 1-Methylnaphthalene 60.0 39.8 ug/Kg 66 50-150 LCS LCS Surrogate %Recovery Qualifier Limits 2-Fluorobiphenyl 74 42-104 Nitrobenzene-d5 70 14 -139 Terphenyl-d14 91 46-125 Lab Sample ID: 280-176141-B-1-B MS Client Sample ID: Matrix Spike Matrix: Solid Prep Type: Total/NA Analysis Batch: 612600 Prep Batch: 612097 Sample Sample Spike MS MS %Rec Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits 2-Methylnaphthalene ND 64.3 41.6 ug/Kg 65 30-120 Acenaphthene ND 64.3 45.7 ug/Kg 71 35-120 Acenaphthylene ND 64.3 39.5 ug/Kg 7a 61 41 -120 Benzo[a]anthracene ND 64.3 47.9 ug/Kg 74 36-120 Benzo[a]pyrene ND F1 F2 64.3 124 F1 ug/Kg 193 20-120 Benzo[b]fluoranthene ND F1 F2 64.3 97.8 F1 ug/Kg 152 37-120 Benzo[g,h,i]perylene 21 F1 F2 64.3 259 F1 ug/Kg 371 20-123 Benzo[k]fluoranthene ND F1 F2 64.3 95.5 F1 ug/Kg 148 46 -120 Chrysene 3.7 J 64.3 49.0 ug/Kg 71 34 -120 Dibenz(a,h)anthracene ND F1 F2 64.3 215 F1 ug/Kg 334 20-120 Fluoranthene ND 64.3 52.2 ug/Kg 81 45 -120 Fluorene 1.0 J 64.3 46.6 ug/Kg 71 44-120 Indeno[1,2,3-cd]pyrene 3.0 JF1 64.3 224 F1 ug/Kg 344 20-127 Naphthalene ND 64.3 40.7 ug/Kg 63 44-120 Phenanthrene ND 64.3 49.8 ug/Kg 77 44-120 Pyrene ND 64.3 53.6 ug/Kg 83 43 -120 Anthracene ND 64.3 50.2 ug/Kg 78 43-120 1 -Methyl naphthalene 0.56 J 64.3 41.7 ug/Kg 64 50-150 Eurofins Denver Page 105 of 160 6/1/2023 QC Sample Results Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon Method: 8270D SIM - Semivolatile Organic Compounds (GC/MS SIM) (Continued) Lab Sample ID: 280-176141-B-1-B MS Matrix: Solid Analysis Batch: 612600 MS MS Surrogate %Recovery Qualifier Limits 2-Fluorobiphenyl 66 42_ 104 Nitrobenzene-d5 80 14 -139 Terphenyl-d14 93 46-125 Lab Sample ID: 280-176141-B-1-C MSD Matrix: Solid Analysis Batch: 612600 Analyte Sample Sample Result Qualifier Spike Added MSD MSD Result Qualifier 2-Methyl naphthalene ND 64.3 35.3 Acenaphthene ND 64.3 42.8 Acenaphthylene ND 64.3 30.2 Benzo[a]anthracene ND 64.3 41.4 Benzo[a]pyrene ND F1 F2 64.3 84.7 F1 F2 Benzo[b]fluoranthene ND F1 F2 64.3 70.6 F2 Benzo[g,h,i]perylene 21 F1 F2 64.3 175 F1 F2 Benzo[k]fluoranthene ND F1 F2 64.3 71.1 F2 Chrysene 3.7 J 64.3 41.9 Dibenz(a,h)anthracene ND F1 F2 64.3 142 F1 F2 Fluoranthene ND 64.3 45.6 Fluorene 1.0 J 64.3 42.3 Indeno[1,2,3-cd]pyrene 3.0 J F1 64.3 148 F1 Naphthalene ND 64.3 34.5 Phenanthrene ND 64.3 42.7 Pyrene ND 64.3 46.5 Anthracene ND 64.3 43.2 1-Methylnaphthalene 0.56 J 64.3 35.4 MSD MSD Surrogate %Recovery Qualifier Limits 2-Fluorobiphenyl 63 42-104 Nitrobenzene-d5 67 14- 139 Terphenyl-d14 90 46- 125 Lab Sample ID: MB 280-612481/1-A Matrix: Solid Analysis Batch: 612597 Client Sample ID: Matrix Spike Prep Type: Total/NA Prep Batch: 612097 Client Sample ID: Matrix Spike Duplicate Prep Type: Total/NA Prep Batch: 612097 %Rec RPD Unit D %Rec Limits RPD Limit m ug/Kg 55 30-120 16 30 ug/Kg CF 67 35-120 6 50 ug/Kg 47 41-120 27 50 ug/Kg t 64 36 -120 15 40 ug/Kg 132 20 -120 38 30 ug/Kg 110 37-120 32 28 ug/Kg 240 20-123 39 30 ug/Kg 111 46-120 29 28 ug/Kg 59 34-120 16 41 ug/Kg # 221 20-120 41 25 ug/Kg 0 71 45-120 13 30 ug/Kg 0 64 44-120 10 50 ug/Kg 0 225 20-127 41 50 ug/Kg 0 54 44-120 16 50 ug/Kg 0 66 44-120 15 42 ug/Kg 0 72 43-120 14 30 ug/Kg 0 67 43-120 15 50 ug/Kg 54 50-150 16 50 Client Sample ID: Method Blank Prep Type: Total/NA Prep Batch: 612481 Analyte MB MB Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 2-Methyl naphthalene ND 10 0.62 ug/Kg 05/15/2314:28 05/16/2311:05 1 Acenaphthene ND 10 0.92 ug/Kg 05/15/2314:28 05/16/2311:05 1 Acenaphthylene ND 10 0.78 ug/Kg 05/15/2314:28 05/16/2311:05 1 Benzo[a]anthracene ND 10 1.8 ug/Kg 05/15/2314:28 05/16/2311:05 1 Benzo[a]pyrene ND 10 1.5 ug/Kg 05/15/2314:28 05/16/2311:05 1 Benzo[b]fluoranthene ND 10 2.4 ug/Kg 05/15/2314:28 05/16/2311:05 1 Benzo[g,h,i]perylene ND 10 2.2 ug/Kg 05/15/2314:28 05/16/2311:05 1 Benzo[k]fluoranthene ND 10 2.0 ug/Kg 05/15/2314:28 05/16/2311:05 1 Chrysene ND 10 2.0 ug/Kg 05/15/2314:28 05/16/2311:05 1 Dibenz(a,h)anthracene ND 10 2.6 ug/Kg 05115/2314:28 05/16/2311:05 1 Eurofins Denver Page 106 of 160 6/1/2023 QC Sample Results Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Job ID: 280-176200-1 Method: 8270D SIM - Semivolatile Organic Compounds (GC/MS SIM) (Continued) Lab Sample ID: MB 280-612481/1-A Client Sample ID: Method Blank Matrix: Solid Prep Type: Total/NA Analysis Batch: 612597 Prep Batch: 612481 MB MB Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Fluoranthene ND 10 2.0 ug/Kg 05/15/2314:28 05/16/2311:05 1 Fluorene ND 10 0.94 ug/Kg 05/15/2314:28 05/16/2311:05 1 Indeno[1,2,3-cd]pyre ne ND 10 2.2 ug/Kg 05/15/2314:28 05/16/2311:05 1 Naphthalene ND 10 0.65 ug/Kg 05/15/2314:28 05/16/2311:05 1 Phenanthrene ND 10 2.2 ug/Kg 05/15/2314:28 05/16/2311:05 1 Pyrene ND 10 2.2 ug/Kg 05/15/2314:28 05/16/2311:05 1 Anthracene ND 10 1.4 ug/Kg 05/15/2314:28 05/16/2311:05 1 1-Methylnaphthalene ND 10 0.52 ug/Kg 05/15/2314:28 05/16/2311:05 1 MB MB m Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 2-Fluorobiphenyl 65 42-104 05115123 14:28 05/16/23 11:05 1 Nitrobenzene-d5 62 14 -139 05/15/23 14:28 05/16/23 11:05 1 Terphenyl-d14 84 46-125 05/15/23 14:28 05/16/23 11:05 1 Lab Sample ID: LCS 280-612481/2-A Matrix: Solid Analysis Batch: 612597 Analyte 2-Methylnaphthalene Acenaphthene Acenaphthylene Benzo[a]anthracene Benzo[a]pyrene Benzo[b]fluoranthene Benzo[g,h,i]perylene Benzo[k]fluoranthene Chrysene Dibenz(a,h)anth racene Fluoranthene Fluorene Indeno[1,2,3-cd]pyrene Naphthalene Phenanthrene Pyrene Anthracene 1-Methylnaphthalene Surrogate 2-Fluorobiphenyl Nitrobenzene-d5 Terphenyl-d14 LCS LCS %Recovery Qualifier 60 54 75 Spike Added 60.0 60.0 60.0 60.0 60.0 60.0 60.0 60.0 60.0 60.0 60.0 60.0 60.0 60.0 60.0 60.0 60.0 60.0 Limits 42-104 14-139 46-125 LCS LCS Result Qualifier 33.2 31.6 35.8 38.2 30.8 38.2 32.5 38.1 40.2 35.0 39.2 35.1 33.8 32.5 38.9 38.0 37.0 33.2 Client Sample ID: Lab Control Sample Prep Type: Total/NA Prep Batch: 612481 %Rec Unit D %Rec Limits ug/Kg 55 30-120 ug/Kg 53 35-120 ug/Kg 60 41-120 ug/Kg 64 36-120 ug/Kg 51 20-120 ug/Kg 64 37-120 ug/Kg 54 20-123 ug/Kg 64 46-120 ug/Kg 67 34-120 ug/Kg 58 20-120 ug/Kg 65 45-120 ug/Kg 58 44-120 ug/Kg 56 20-127 ug/Kg 54 44-120 ug/Kg 65 44-120 ug/Kg 63 43-120 ug/Kg 62 43-120 ug/Kg 55 50-150 Eurofins Denver Page 107 of 160 6/1 /2023 QC Sample Results Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon Method: 8270D SIM - Semivolatile Organic Compounds (GC/MS SIM) (Continued) Lab Sample ID: 280-176200-13 MS Client Sample ID: DU04-SU01-230504-0.5 Matrix: Solid Prep Type: Total/NA Analysis Batch: 612597 Prep Batch: 612481 Sample Sample Spike MS MS %Rec Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits 2-Methylnaphthalene 16 58.8 47.9 ug/Kg 54 30 -120 Acenaphthene 6.6 J 58.8 41.9 ug/Kg 60 35 -120 Acenaphthylene ND 58.8 34.1 ug/Kg 58 41 -120 Benzo[a]anthracene 1.8 J 58.8 36.0 ug/Kg 58 36-120 Benzo[a]pyrene ND 58.8 33.2 ug/Kg 56 20 -120 Benzo[b]fluoranthene ND 58.8 36.5 ug/Kg 62 37-120 Benzo[g,hJ]perylene ND 58.8 32.7 ug/Kg 56 20-123 Benzo[k]fluoranthene ND 58.8 33.8 ug/Kg 58 46-120 Chrysene 3.7 J 58.8 36.7 ug/Kg 56 34 -120 Dibenz(a,h)anthracene ND 58.8 30.1 ug/Kg 51 20-120 m Fluoranthene 14 58.8 45.3 ug/Kg 53 45 -120 Fluorene 4.5 J 58.8 38.4 ug/Kg 58 44 -120 Indeno[1,2,3-cd]pyrene ND 58.8 31.7 ug/Kg 54 20 -127 Naphthalene 10 58.8 40.1 ug/Kg 51 44 -120 Phenanthrene 26 58.8 59.5 ug/Kg 57 44 -120 Pyrene 8.9 J 58.8 41.6 ug/Kg 56 43 -120 Anthracene ND 58.8 37.1 ug/Kg 63 43 -120 1 -Methyl naphthalene 7.9 J 58.8 40.3 ug/Kg 55 50-150 MS MS Surrogate %Recovery Qualifier Limits j 2-Fluorobiphenyl 59 42-104 Nitrobenzene-d5 67 14- 139 Terphenyl-d14 54 46- 125 Lab Sample ID: 280-176200-13 MSD Client Sample ID: DU04-SU01-230504-0.5 Matrix: Solid Prep Type: Total/NA Analysis Batch: 612597 Prep Batch: 612481 Sample Sample Spike MSD MSD %Rec RPD Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits RPD Limit 2-Methyl naphthalene 16 59.6 46.0 ug/Kg 50 30 -120 4 30 Acenaphthene 6.6 J 59.6 40.5 ug/Kg 57 35-120 3 50 Acenaphthylene ND 59.6 32.1 ug/Kg 54 41 -120 6 50 Benzo[a]anthracene 1.8 J 59.6 36.7 ug/Kg 59 36-120 2 40 Benzo[a]pyrene ND 59.6 31.8 ug/Kg 53 20-120 4 30 Benzo[b]fluoranthene ND 59.6 37.1 ug/Kg 62 37 - 120 2 28 Benzo[g,h,i]perylene ND 59.6 31.0 ug/Kg 52 20-123 5 30 Benzo[k]fluoranthene ND 59.6 32.1 ug/Kg 54 46-120 5 28 Chrysene 3.7 J 59.6 38.4 ug/Kg 58 34 -120 4 41 Dibenz(a,h)anthracene ND 59.6 28.8 ug/Kg 48 20 -120 4 25 Fluoranthene 14 59.6 52.0 ug/Kg 64 45 -120 14 30 Fluorene 4.5 J 59.6 36.0 ug/Kg 53 44 -120 7 50 Indeno[1,2,3-cd]pyrene ND 59.6 30.5 ug/Kg 51 20-127 4 50 Naphthalene 10 59.6 38.6 ug/Kg 48 44 -120 4 50 Phenanthrene 26 59.6 61.3 ug/Kg 59 44-120 3 42 Pyrene 8.9 J 59.6 43.6 ug/Kg 58 43-120 5 30 Anthracene ND 59.6 35.6 ug/Kg 60 43 -120 4 50 1-Methylnaphthalene 7.9 J 59.6 38.2 ug/Kg 51 50-150 5 50 Eurofins Denver Page 108 of 160 6/1/2023 QC Sample Results Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Job ID: 280-176200-1 Method: 8270D SIM - Semivolatile Organic Compounds (GC/MS SIM) (Continued) Lab Sample ID: 280-176200-13 MSD Client Sample ID: DU04-SU01-230504-0.5 Matrix: Solid Prep Type: Total/NA Analysis Batch: 612597 Prep Batch: 612481 MSD MSD Surrogate %Recovery Qualifier Limits 2-Fluorobiphenyl 61 42-104 Nitrobenzene-d5 67 14-139 Terphenyl-d14 58 46-125 Method: 8082A - Polychlorinated Biphenyls (PCBs) by Gas Chromatography Lab Sample ID: MB 280-612472/1-A Client Sample ID: Method Blank Matrix: Solid Prep Type: Total/NA Analysis Batch: 612755 Prep Batch: 612472 MB MB Analyte PCB-1221 PCB-1016 PCB-1232 PCB-1242 PCB-1248 PCB-1254 PCB-1260 PCB-1262 PCB-1268 Polychlorinated biphenyls, Total Surrogate Tetrachloro-m-xylene DCB Decachlorobiphenyl Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac ND 94 31 ug/Kg 05/15/2314:22 05/17/23 18:09 1 ND 66 21 ug/Kg 05/15/2314:22 05/17/23 18:09 1 ND 66 10 ug/Kg 05/15/2314:22 05/17/23 18:09 1 ND 66 18 ug/Kg 05/15/2314:22 05/17/23 18:09 1 ND 66 16 ug/Kg 05/15/2314:22 05/17/23 18:09 1 ND 66 11 ug/Kg 05/15/2314:22 05/17/23 18:09 1 ND 66 17 ug/Kg 05/15/2314:22 05/17/23 18:09 1 ND 66 5.5 ug/Kg 05/15/2314:22 05/17/23 18:09 1 ND 66 21 ug/Kg 05/15/2314:22 05/17/23 18:09 1 ND 66 2.3 ug/Kg 05/15/2314:22 05/17/23 18:09 1 MB MB %Recovery Qualifier Limits Prepared Analyzed Dil Fac 100 53 -128 05/15/23 14:22 05/17/23 18:09 1 113 59 -130 05115123 14:22 05/17/23 18:09 1 Lab Sample ID: LCS 280-612472/2-A Matrix: Solid Analysis Batch: 612755 Analyte PCB-1016 PCB-1260 Surrogate Tetrachloro-m-xylene DCB Decachlorobiphenyl LCS LCS %Recovery Qualifier 123 106 Lab Sample ID: 280-176200-14 MS Matrix: Solid Analysis Batch: 612755 Analyte PCB-1016 PCB-1260 Surrogate Tetrachloro-m-xylene Sample Sample Result Qualifier ND ND F1 MS MS %Recovery Qualifier 87 Client Sample ID: Lab Control Sample Prep Type: Total/NA Prep Batch: 612472 Spike LCS LCS %Rec Added Result Qualifier Unit D %Rec Limits 133 145 ug/Kg 109 54-132 133 150 ug/Kg 112 62-129 Limits 53 - 128 59 - 130 Client Sample ID: DU06-SU03-230504-0.5 Prep Type: Total/NA Prep Batch: 612472 Spike MS MS %Rec Added Result Qualifier Unit D %Rec Limits 129 77.1 ug/Kg 60 54 -132 129 65.0 F1 ug/Kg 50 62 -129 Limits 53- 128 Eurofins Denver Flol Page 109 of 160 6/1 /2023 QC Sample Results Client: SCS Engineers Job ID. 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon Method: 8082A - Polychlorinated Biphenyls (PCBs) by Gas Chromatography (Continued) Lab Sample ID: 280-176200-14 MS Client Sample ID: DU06-SU03-230504-0.5 Matrix: Solid Prep Type: Total/NA Analysis Batch: 612755 Prep Batch: 612472 MS MS Surrogate %Recovery Qualiffer Limits DCB Decachlorobiphenyl 84 59-130 Lab Sample ID: 280-176200-14 MSD Client Sample ID: DU06-SU03-230504-0.5 Matrix: Solid Prep Type: Total/NA Analysis Batch: 612755 Prep Batch: 612472 Sample Sample Spike MSD MSD %Rec RPD Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits RPD Limit PCB-1016 ND 126 74.0 ug/Kg 59 54-132 4 36 PCB-1260 ND F1 126 47.4 J F1 ug/Kg 38 62-129 31 44 MSD MSD Surrogate %Recovery Qualifier Limits Tetrach/oro-m-xylene 74 53-128 DCB Decachlorobiphenyl 81 59-130 Method: NWTPH-Dx - Northwest - Semi -Volatile Petroleum Products (GC) Lab Sample ID: MB 580-425673/1-A Matrix: Water Analysis Batch: 425687 Analyte #2 Diesel (C10-C24) Motor Oil (>C24-C36) Surrogate o-Terphenyl MB MB Result Qualifier RL ND 0.11 ND 0.35 MB MB %Recovery Qualifiler Limits 66 50 -150 Lab Sample ID: LCS 580-425673/2-A Matrix: Water Analysis Batch: 425687 Analyte #2 Diesel (C10-C24) Motor Oil (>C24-C36) LCS LCS Surrogate %Recovery Qualifier o-Terphenyl 85 Lab Sample ID: LCSD 580-425673/3-A Matrix: Water Analysis Batch: 425687 Analyte #2 Diesel (C10-C24) Motor Oil (>C24-C36) Client Sample ID: Method Blank Prep Type: Total/NA Prep Batch: 425673 MDL Unit D Prepared Analyzed Dil Fac 0.065 mg/L 05/11/23 09:43 05/11/23 20:13 1 0.096 mg/L 05/11/23 09:43 05/11/23 20:13 1 Prepared Analyzed Dil Fac 05111123 09:43 0"1/23 20:13 1 Client Sample ID: Lab Control Sample Prep Type: Total/NA Prep Batch: 425673 Spike LCS LCS %Rec Added Result Qualifier Unit D %Rec Limits 4.00 2.97 mg/L 74 50 -120 4.00 3.11 mg/L 78 64 -120 Limits 50 -150 Client Sample ID: Lab Control Sample Dup Prep Type: Total/NA Prep Batch: 425673 Spike LCSD LCSD %Rec RPD Added Result Qualifier Unit D %Rec Limits RPD Limit 4.00 3.02 mg/L 76 50 -120 2 26 4.00 3.20 mg/L 80 64 - 120 3 24 Eurofins Denver Page 110 of 160 6/1/2023 QC Sample Results Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon Method: NWTPH-Dx - Northwest - Semi -Volatile Petroleum Products (GC) (Continued) Lab Sample ID: LCSD 580-425673/3-A Client Sample ID: Lab Control Sample Dup Matrix: Water Prep Type: Total/NA Analysis Batch: 425687 Prep Batch: 425673 LCSD LCSD Surrogate %Recovery Qualifier o-Terphenyl 95 Lab Sample ID: MB 580-425843/1-A Matrix: Solid. Analysis Batch: 425959 MB MB Analyte Result QualMer #2 Diesel (C10-C24) ND Motor Oil (>C24-C36) ND MB MB Surrogate %Recovery Qualifier o-Terphenyl 67 Lab Sample ID: LCS 580-425843/2-A Matrix: Solid Analysis Batch: 425959 Analyte #2 Diesel (C10-C24) Motor Oil (>C24-C36) LCS LCS Surrogate %Recovery Qualifier o-Terphenyl 81 Lab Sample ID: LCSD 580-425843/3-A Matrix: Solid Analysis Batch: 425959 Analyte #2 Diesel (C10-C24) Motor Oil (>C24-C36) LCSD LCSD Surrogate %Recovery Qualifier o-Terphenyl 78 Lab Sample ID: 280-176200-3 DU Matrix: Solid Analysis Batch: 425959 Analyte #2 Diesel (C10-C24) Motor Oil (>C24-C36) Surrogate o-Terphenyl Sample Sample Result Qualifier 22 J 310 DU DU %Recovery Qualifier Y1 Limits 50 -150 Client Sample ID: Method Blank Prep Type: Total/NA Prep Batch: 425843 RL MDL Unit D Prepared Analyzed Dil Fac 50 12 mg/Kg 05/12/2313:28 05/15/2316:58 1 50 18 mg/Kg 05/12/2313:28 05/15/2316:58 1 Limits Prepared Analyzed Dil Fac 50 -150 05112123 13:28 051IW3 16:58 1 Client Sample ID: Lab Control Sample Prep Type: Total/NA Prep Batch: 425843 Spike LCS LCS %Rec Added Result Qualifier Unit D %Rec Limits 500 444 mg/Kg 89 70-125 500 423 mg/Kg 85 70-129 Limits 50-150 Client Sample ID: Lab Control Sample Dup Prep Type: Total/NA Prep Batch: 425843 Spike LCSD LCSD %Rec RPD Added Result Qualifier Unit D %Rec Limits RPD Limit 500 432 mg/Kg 86 70- 225 3 16 500 410 mg/Kg 82 70-129 3 16 Limits 50-150 Client Sample ID: DU05-SU06-230505-COMP01 Prep Type: Total/NA Prep Batch: 425843 DU DU RPD Result Qualifier Unit D RPD Limit 16.5 J mg/Kg 29 35 215 F3 mg/Kg 36 35 Limits 50-150 Eurofins Denver Page 111 of 160 6/1 /2023 QC Sample Results Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon Method: NWTPH-Dx - Northwest - Semi -Volatile Petroleum Products (GC) (Continued) Lab Sample ID: MB 580-426406/1-A Client Sample ID: Method Blank Matrix: Solid Prep Type: Total/NA Analysis Batch: 427371 Prep Batch: 426406 MB MB Analyte Result Qualifier RL MDL Unit . D Prepared Analyzed Dil Fac #2 Diesel (C10-C24) ND 50 12 mg/Kg 05/18/23 14:28 05/30/23 12:30 1 Motor Oil (>C24-C36) ND 50 18 mg/Kg 05/18/23 14:28 05/30/23 12:30 1 MB Ma Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac o-Terphenyl 62 50- 150 05118123 14.28 05/30/23 12:30 1 Lab Sample ID: LCS 580-426406/2-A Client Sample ID: Lab Control Sample Matrix: Solid Prep Type: Total/NA Analysis Batch: 427371 Prep Batch: 426406 Spike LCS LCS %Rec Analyte Added Result Qualifier Unit D %Rec Limits #2 Diesel (C10-C24) 500 397 mg/Kg 79 70-125 Motor Oil (>C24-C36) 500 408 mg/Kg 82 70 -129 LCS LCS Surrogate %Recovery Qualifier Limits o-Terphenyl 84 50-150 Lab Sample ID: LCSD 580-426406/3-A Client Sample ID: Lab Control Sample Dup Matrix: Solid Prep Type: Total/NA Analysis Batch: 427371 Prep Batch: 426406 Spike LCSD LCSD %Rec RPD Analyte Added Result Qualifier Unit D %Rec Limits RPD Limit #2 Diesel (C10-C24) 500 407 mg/Kg 81 70-125 3 16 Motor Oil (>C24-C36) 500 416 mg/Kg 83 70-129 2 16 LCSD LCSD Surrogate %Recovery Qualfer Limits o-Terphenyl 85 50-150 Lab Sample ID: 280-176200-10 DU Client Sample ID: DU07-230502-Native Matrix: Solid Prep Type: Total/NA Analysis Batch: 427371 Prep Batch: 426406 Sample Sample DU DU RPD Analyte Result Qualifier Result Qualifier Unit D RPD Limit #2 Diesel (C10-C24) ND H ND mg/Kg NC 35 Motor Oil (>C24-C36) ND H ND mg/Kg NC 35 DU DU Surrogate %Recovery Qualifier Limits &-Terphenyl 63 50-150 Lab Sample ID: 280-176200-21 DU Client Sample ID: DU03-230505-0.5 Matrix: Solid Prep Type: Total/NA Analysis Batch: 427371 Prep Batch: 426406 Sample Sample DU DU RPD Analyte Result Qualifier Result Qualifier Unit D RPD Limit #2 Diesel (C10-C24) 35 J 36.1 J mg/Kg 4 35 Motor Oil (>C24-C36) 360 400 mg/Kg 9 35 Eurofins Denver Page 112 of 160 6/1/2023 QC Sample Results Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon Method: NWTPH-Dx - Northwest - Semi -Volatile Petroleum Products (GC) (Continued) Lab Sample ID: 280-176200-21 DU Client Sample ID: DU03-230505-0.5 Matrix: Solid Prep Type: Total/NA Analysis Batch: 427371 Prep Batch: 426406 DU DU Surrogate %Recovery Qualifier Limits o-Terphenyl 65 50-150 Method: 6010D - Metals (ICP) Lab Sample ID: MB 280-612037/1-A Client Sample ID: Method Blank Matrix: Solid Prep Type: Total/NA Analysis Batch: 612533 Prep Batch: 612037 MB MB Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Silver ND 1.0 0.16 mg/Kg 05/11/2314:40 05/15/2312:10 1 m Arsenic ND 2.0 0.67 mg/Kg 05/11/2314:40 05/15/2312:10 1 Barium ND 1.0 0.30 mg/Kg 05/11/2314:40 05/15/2312:10 1 Cadmium ND 0.50 0.041 mg/Kg 05/11/2314:40 05/15/2312:10 1 Chromium ND 1.5 0.12 mg/Kg 05/11/2314:40 05/15/2312:10 1 Lead ND 0.90 0.31 mg/Kg 05/11/2314:40 05/15/2312:10 1 Selenium ND 1.8 0.86 mg/Kg 05/11/2314:40 05/15/2312:10 1 Lab Sample ID: LCS 280-612037/2-A Client Sample ID: Lab Control Sample Matrix: Solid Prep Type: Total/NA Analysis Batch: 612533 Prep Batch: 612037 Spike LCS LCS %Rec Analyte Added Result Qualifier Unit D %Rec Limits Silver 5.00 5.21 mg/Kg 104 87 -114 Arsenic 100 96.9 mg/Kg 97 85 -110 Barium 100 95.9 mg/Kg 96 87-112 Cadmium 100 94.0 mg/Kg 94 87-110 Chromium 100 93.7 mg/Kg 94 84-114 Lead 100 96.0 mg/Kg 96 86 -110 Selenium 100 94.2 mg/Kg 94 83-110 Lab Sample ID: 180-156210-D-1-B MS Client Sample ID: Matrix Spike Matrix: Solid Prep Type: Total/NA Analysis Batch: 612533 Prep Batch: 612037 Sample Sample Spike MS MS %Rec Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits Silver 1.6 J 9.28 11.4 mg/Kg 106 75 -125 Arsenic 5.0 186 181 mg/Kg �a 95 76 -111 Barium 220 186 427 mg/Kg D 110 75 -125 Cadmium 0.70 J 186 164 mg/Kg 88 75 -125 Chromium 27 186 199 mg/Kg 93 75-125 Lead 45 186 215 mg/Kg 91 75 -125 Selenium 4.2 186 177 mg/Kg 93 76-104 Lab Sample ID: 180-156210-D-1-C MSD Client Sample ID: Matrix Spike Duplicate Matrix: Solid Prep Type: Total/NA Analysis Batch: 612533 Prep Batch: 612037 Sample Sample Spike MSD MSD %Rec RPD Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits RPD Limit Silver 1.6 J 9.50 11.2 mg/Kg rr 101 75-125 2 20 Eurofins Denver Page 113 of 160 6/1/2023 QC Sample Results Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon Method: 6010D - Metals (ICP) (Continued) Lab Sample ID: 180-156210-D-1-C MSD Client Sample ID: Matrix Spike Duplicate Matrix: Solid Prep Type: Total/NA Analysis Batch: 612533 Prep Batch: 612037 Sample Sample Spike MSD MSD %Rec RPD Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits RPD Limit Arsenic 5.0 190 185 mg/Kg i�T 95 76-111 2 20 Barium 220 190 392 mg/Kg 89 75-125 9 20 Cadmium 0.70 J 190 166 mg/Kg 87 75-125 2 20 Chromium 27 190 200 mg/Kg 91 75-125 0 20 Lead 45 190 209 mg/Kg 86 75-125 3 20 Selenium 4.2 190 181 mg/Kg 93 76 -104 2 20 Lab Sample ID: MB 280-612386/1-A Client Sample ID: Method Blank Matrix: Solid Prep Type: Total/NA Analysis Batch: 613592 Prep Batch: 612386 ml MB MB Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Silver ND 1.0 0.16 mg/Kg 05/22/23 07:43 05/22/23 21:32 1 Arsenic ND 2.0 0.67 mg/Kg 05/22/23 07:43 05/22/23 21:32 1 Barium ND 1.0 0.30 mg/Kg 05/22/23 07:43 05/22/23 21:32 1 Cadmium ND 0.50 0.041 mg/Kg 05/22/23 07:43 05/22/23 21:32 1 Chromium 0.134 J 1.5 0.12 mg/Kg 05/22/23 07:43 05/22/23 21:32 1 Lead ND 0.90 0.31 mg/Kg 05/22/23 07:43 05/22/23 21:32 1 Selenium ND 1.8 0.86 mg/Kg 05/22/23 07:43 05/22/23 21:32 1 Lab Sample ID: LCS 280-612386/2-A Client Sample ID: Lab Control Sample Matrix: Solid Prep Type: Total/NA Analysis Batch: 613592 Prep Batch: 612386 Spike LCS LCS %Rec Analyte Added Result Qualifier Unit D %Rec Limits Silver 5.00 4.58 mg/Kg 92 87 -114 Arsenic 100 96.2 mg/Kg 96 85 -110 Barium 100 97.3 mg/Kg 97 87 -112 Cadmium 100 94.0 mg/Kg 94 87 -110 Chromium 100 94.6 mg/Kg 95 84 -114 Lead 100 95.4 mg/Kg 95 86 -110 Selenium 100 93.3 mg/Kg 93 83-110 Lab Sample ID: 280-176200-10 MS Client Sample ID: DU07-230502-Native Matrix: Solid Prep Type: Total/NA Analysis Batch: 613592 Prep Batch: 612386 Sample Sample Spike MS MS %Rec Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits Silver ND 3.71 3.31 mg/Kg 89 75 -125 Arsenic 2.3 74.1 67.8 mg/Kg 88 76 -111 Barium 81 74.1 152 mg/Kg 96 75 - 125 Cadmium ND 74.1 64.8 mg/Kg 87 75 - 125 Chromium 20 B 74.1 87.1 mg/Kg 90 75 -125 Lead 3.4 74.1 68.5 mg/Kg 88 75 -125 Selenium ND 74.1 64.3 mg/Kg 87 76 -104 Eurofins Denver Page 114 of 160 6/1/2023 QC Sample Results Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon -- ............. - -- - _ .....----- Method: 6010D - Metals (ICP) (Continued) --- -- - Lab Sample ID: 280-176200-10 MSD Matrix: Solid Analysis Batch: 613592 Sample Sample Spike MSD MSD Analyte Result Qualifier Added Result Qualifier Silver ND 3.70 3.33 Arsenic 2.3 74.1 67.1 Barium 81 74.1 146 Cadmium ND 74.1 64.5 Chromium 20 B 74.1 85.9 Lead 3.4 74.1 67.8 Selenium ND 74.1 64.5 Lab Sample ID: 280-176200-13 MS Matrix: Solid Analysis Batch: 613592 Sample Sample Analyte Result Qualifier Lead 9.5 Lab Sample ID: 280-176200-13 MSD Matrix: Solid j Analysis Batch: 613592 Sample Sample Analyte Result Qualifier Lead 9.5 Job ID: 280-176200-1 Client Sample ID: DU07-230502-Native Prep Type: Total/NA Prep Batch: 612386 Unit D %Rec %Rec Limits RPD RPD Limit mg/Kg 90 75-125 0 20 mg/Kg 87 76-111 1 20 mg/Kg 88 75-125 4 20 mg/Kg 87 75-125 0 20 mg/Kg 88 75-125 1 20 mg/Kg 87 75-125 1 20 mg/Kg 87 76-104 0 20 Client Sample ID: DU04-SU01-230504-0.5 M. Prep Type: Total/NA Prep Batch: 612386 Spike MS MS %Rec Added Result Qualifier Unit D %Rec Limits 74.5 70.0 mg/Kg 81 75 -125 Client Sample ID: DU04-SU01-230504-0.5 Prep Type: Total/NA Prep Batch: 612386 Spike MSD MSD %Rec RPD Added Result Qualifier Unit D %Rec Limits RPD Limit 74.7 73.6 mg/Kg 86 75 -125 5 20 Lab Sample ID: 280-176200-14 MS Matrix: Solid Analysis Batch: 613592 Sample Sample Spike MS MS Analyte Result Qualifier Added Result Qualifier Silver ND 3.59 3.18 Arsenic 2.2 71.8 65.9 Barium 57 71.8 120 Cadmium 0.13 J 71.8 62.1 Chromium 14 B 71.8 77.5 Lead 20 71.8 80.5 Selenium ND 71.8 63.0 Lab Sample ID: 280-176200-14 MSD Matrix: Solid Analysis Batch: 613592 Analyte Sample Sample Result Qualifier Spike Added MSD MSD Result Qualifier Silver ND 3.60 3.15 Arsenic 2.2 71.9 66.4 Barium 57 71.9 121 Cadmium 0.13 J 71.9 61.8 Chromium 14 B 71.9 78.1 Lead 20 71.9 84.5 Selenium ND 71.9 62.5 Client Sample ID: DU06-SU03-230504-0.5 Prep Type: Total/NA Prep Batch: 612386 %Rec Unit D %Rec Limits mg/Kg 89 75 -125 mg/Kg 89 76 -111 mg/Kg 88 75 -125 mg/Kg 86 75 - 125 mg/Kg 89 75-125 mg/Kg 84 75-125 mg/Kg 88 76 - 104 Client Sample ID: DU06-SU03-230504-0.5 Prep Type: Total/NA Prep Batch: 612386 %Rec RPD Unit D %Rec Limits RPD Limit mg/Kg 87 75-125 1 20 mg/Kg 89 76 -111 1 20 mg/Kg 89 75-125 1 20 mg/Kg 86 75-125 0 20 mg/Kg 90 75-125 1 20 mg/Kg 89 75-125 5 20 mg/Kg 87 76-104 1 20 Eurofins Denver Page 115 of 160 6/1 /2023 QC Sample Results Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon Method: 6010D - Metals (ICP) (Continued) Lab Sample ID: 280-176200-15 MS Client Sample ID: DU01-230504-0.5 Matrix: Solid Prep Type: Total/NA Analysis Batch: 613592 Prep Batch: 612386 Sample Sample Spike MS MS %Rec Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits Silver ND 3.98 3.60 mg/Kg 91 75-125 Arsenic 2.3 79.6 74.0 mg/Kg 90 76 - 111 Barium 51 79.6 125 mg/Kg 93 75-125 Cadmium 0.038 J 79.6 70.3 mg/Kg 88 75-125 Chromium 12 B 79.6 84.4 mg/Kg 91 75-125 Lead 5.2 79.6 75.2 mg/Kg 88 75 - 125 Selenium ND 79.6 71.3 mg/Kg 90 76-104 Lab Sample ID: 280-176200-15 MSD Client Sample ID: DU01-230504-0.5 Matrix: Solid Prep Type: Total/NA m Analysis Batch: 613592 Prep Batch: 612386 Sample Sample Spike MSD MSD %Rec RPD Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits RPD Limit Silver ND 3.97 3.57 mg/Kg 90 75-125 1 20 Arsenic 2.3 79.5 72.9 mg/Kg 89 76-111 1 20 Barium 51 79.5 122 mg/Kg 89 75-125 2 20 Cadmium 0.038 J 79.5 69.8 mg/Kg 88 75-125 1 20 Chromium 12 B 79.5 83.8 mg/Kg 90 75-125 1 20 Lead 5.2 79.5 74.8 mg/Kg 88 75 - 125 1 20 Selenium ND 79.5 70.6 mg/Kg 89 76-104 1 20 FLab Sample ID: MB 280-612438/1-A Client Sample ID: Method Blank Matrix: Solid Prep Type: Total/NA Analysis Batch: 613158 Prep Batch: 612438 MB MB Analyte Result Qualifier [Lead RL MDL Unit D Prepared Analyzed Dil Fac ND 0.90 0.31 mg/Kg 05/16/23 15:07 05/19/23 03:37 1 Lab Sample ID: LCS 280-612438/2-A Client Sample ID: Lab Control Sample Matrix: Solid Prep Type: Total/NA Analysis Batch: 613158 Prep Batch: 612438 Spike LCS LCS %Rec Analyte Added Result Qualifier Unit D %Rec Limits Lead 100 93.5 mg/Kg 93 86-110 Lab Sample ID: 280-176468-A-1-B MS Client Sample ID: Matrix Spike Matrix: Solid Prep Type: Total/NA Analysis Batch: 613158 Prep Batch: 612438 Sample Sample Spike MS MS %Rec Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits Lead 11 102 98.7 mg/Kg a 86 75-125 Lab Sample ID: 280-176468-A-1-C MSD Client Sample ID: Matrix Spike Duplicate Matrix: Solid Prep Type: Total/NA Analysis Batch: 613158 Prep Batch: 612438 Sample Sample Spike MSD MSD %Rec RPD Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits RPD Limit Lead 11 100 100 mg/Kg a 89 75 - 125 2 20 Eurofins Denver Page 116 of 160 6/1/2023 QC Sample Results Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Method: 6010D - Metals (ICP) (Continued) Lab Sample ID: MB 280-611911/1-A Matrix: Water Analysis Batch: 612415 MB MB Analyte Result Qualifier RL MDL Unit Job ID: 280-176200-1 Client Sample ID: Method Blank Prep Type: Total Recoverable Prep Batch: 611911 D Prepared Analyzed Dil Fac Silver ND 10 2.0 ug/L 05/11/23 07:42 05/13/23 01:15 1 Arsenic ND 15 4.4 ug/L 05/11/23 07:42 05/13/23 01:15 1 Barium ND 10 0.82 ug/L 05/11/23 07:42 05/13/23 01:15 1 Cadmium ND 5.0 0.13 ug/L 05/11/23 07:42 05/13/23 01:15 1 Chromium ND 10 0.66 ug/L 05/11/23 07:42 05/13/23 01:15 1 Lead ND 9.0 2.7 ug/L 05/11/23 07:42 05/13/23 01:15 1 Selenium ND 20 6.3 ug/L 05/11/23 07:42 05/13/23 01:15 1 Lab Sample ID: LCS 280-611911/2-A Client Sample ID: Lab Control Sample Matrix: Water Prep Type: Total Recoverable m Analysis Batch: 612415 Prep Batch: 611911 Spike LCS LCS %Rec Analyte Added Result Qualifier Unit D %Rec Limits Silver 50.0 52.2 ug/L 104 86 -115 Arsenic 1000 1050 ug/L 105 88 -110 Barium 1000 1020 ug/L 102 90-112 Cadmium 1000 999 ug/L 100 88-111 Chromium 1000 999 ug/L 100 90-113 Lead 1000 1020 ug/L 102 89-110 Selenium 1000 1040 ug/L 104 85 -112 Lab Sample ID: LCSD 280-61191113-A Matrix: Water Analysis Batch: 612415 Analyte Spike Added Client Sample ID: Lab Control Sample Dup Prep Type: Total Recoverable Prep Batch: 611911 LCSD LCSD %Rec RPD Result Qualifier Unit D %Rec Limits RPD Limit Silver 50.0 52.1 ug/L 104 86 -115 0 20 Arsenic 1000 1040 ug/L 104 88 -110 1 20 Barium 1000 1010 ug/L 101 90-112 1 20 Cadmium 1000 990 ug/L 99 88-111 1 20 Chromium 1000 990 ug/L 99 90-113 1 20 Lead 1000 1020 ug/L 102 89-110 1 20 Selenium 1000 1030 ug/L 103 85 -112 1 20 Lab Sample ID: 280-176213-M-1-B MS Client Sample ID: Matrix Spike Matrix: Water Prep Type: Dissolved Analysis Batch: 612415 Prep Batch: 611911 Sample Sample Spike MS MS %Rec Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits Silver ND 50.0 54.0 ug/L 108 75-125 Arsenic 14 J 1000 1080 ug/L 106 84-124 Barium 270 1000 1290 ug/L 102 85-120 Cadmium 0.61 J 1000 955 ug/L 95 82 -119 Chromium 33 1000 1020 ug/L 99 75 -125 Lead 5.4 J 1000 996 ug/L 99 89 -121 Selenium ND 1000 1020 ug/L 102 75-125 Eurofins Denver Page 117 of 160 6/1/2023 QC Sample Results Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Method: 6010D - Metals (ICP) (Continued Lab Sample ID: 280-176213-M-1-C MSD Matrix: Water Analysis Batch: 612415 Sample Sample Analyte Result Qualifier Silver ND Arsenic 14 J Barium 270 Cadmium 0.61 J Chromium 33 Lead 5.4 J Selenium ND Method: 7470A - Mercury (CVAA) F-Lab Sample ID: MB 280-613510/1-A Matrix: Water Analysis Batch: 613659 lR.771�w��:ii>Z:iI�1si Client Sample ID: Matrix Spike Duplicate Prep Type: Dissolved Prep Batch:611911 Spike MSD MSD %Rec RPD Added Result Qualifier Unit D %Rec Limits RPD Limit 50.0 54.5 ug/L 109 75 -125 1 20 1000 1090 ug/L 108 84-124 1 20 1000 1300 ug/L 103 85-120 1 20 1000 965 ug/L 96 82-119 1 20 1000 1030 ug/L 100 75-125 1 20 1000 1000 ug/L 100 89-121 1 20 1000 1040 ug/L 104 75-125 1 20 m Client Sample ID: Method Blank Prep Type: Total/NA Prep Batch: 613510 MB MB Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Mercury ND 0.20 0.061 ug/L 05/23/23 17:26 05/23/23 22:10 1 Lab Sample ID: LCS 280-61351012-A Matrix: Water Analysis Batch: 613659 Analyte Mercury - - Lab Sample ID: LCSD 280-613510/3-A Matrix: Water Analysis Batch: 613659 Analyte Mercury Lab Sample ID: 280-176114-A-2-H MS Matrix: Water Analysis Batch: 613659 Sample Sample Analyte Result Qualifier Mercury ND Lab Sample ID: 280-176114-A-2-1 MSD Matrix: Water Analysis Batch: 613659 Analyte Mercury Sample Sample Result Qualifier ND Client Sample ID: Lab Control Sample Prep Type: Total/NA Prep Batch: 613510 Spike LCS LCS %Rec Added Result Qualifier Unit D %Rec Limits 5.00 4.99 ug/L 100 84 -120 Client Sample ID: Lab Control Sample Dup Prep Type: Total/NA Prep Batch: 613510 Spike LCSD LCSD %Rec RPD Added Result Qualifier Unit D %Rec Limits RPD Limit 5.00 5.00 ug/L 100 84 -120 0 15 Client Sample ID: Matrix Spike Prep Type: Total/NA Prep Batch: 613510 Spike MS MS %Rec Added Result Qualifier Unit D %Rec Limits 5.00 5.09 ug/L 102 75 -125 Client Sample ID: Matrix Spike Duplicate Prep Type: Total/NA Prep Batch: 613510 Spike MSD MSD %Rec RPD Added Result Qualifier Unit D %Rec Limits RPD Limit 5.00 5.08 ug/L 102 75 -125 0 20 Eurofins Denver Page 118 of 160 6/1/2023 QC Sample Results Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Method: 7471 B - Mercury (CVAA) Lab Sample ID: MB 280-613328/1-A Matrix: Solid Analysis Batch: 613486 MB MB Analyte Result Qualifier Mercury ND Lab Sample ID: LCS 280-613328/2-A Matrix: Solid Analysis Batch: 613486 Spike Analyte Added Mercury 0.333 Lab Sample ID: 280-176120-B-1-B MS Matrix: Solid Analysis Batch: 613486 Sample Sample Spike Analyte Result Qualifier Added Mercury 0.0079 J 0.444 Lab Sample ID: 280-176120-B-1-C MSD Matrix: Solid Analsis Batch: 613486 Sample Sample Spike Analyte Result Qualifier Added Mercuryy0.0079 J 0.420 Lab Sample ID: MB 280-613334/1-A Matrix: Solid Analysis Batch: 613486 MB MB Analyte Result Qualifier LMercury ND Lab Sample ID: LCS 280-613334/2-A Matrix: Solid Analysis Batch: 613486 Spike Analyte Added Mercury 0.333 Lab Sample ID: 280-176200-10 MS Matrix: Solid Analysis Batch: 613486 Sample Sample Spike Analyte Result Qualifier Added Mercury 0.019 0.364 Lab Sample ID: 280-176200-10 MSD Matrix: Solid Analysis Batch: 613486 Sample Sample Spike Analyte Result Qualifier Added Mercury 6.019 0.357 RL MDL Unit 0.017 0.0055 mg/Kg Job ID: 280-176200-1 Client Sample ID: Method Blank Prep Type: Total/NA Prep Batch: 613328 D Prepared Analyzed Dil Fac 05/22/23 15:20 05/22/23 21:15 1 Client Sample ID: Lab Control Sample Prep Type: Total/NA Prep Batch: 613328 LCS LCS %Rec Result Qualifier Unit D %Rec Limits 0.340 mg/Kg 102 87 -111 _- Client Sample ID: Matrix Spike Prep Type: Total/NA Prep Batch: 613328 MS MS %Rec Result Qualifier Unit D %Rec Limits 0.474 mg/Kg �s 105 87 -111 Client Sample ID: Matrix Spike Duplicate Prep Type: Total/NA Prep Batch: 613328 MSD MSD %Rec RPD Result Qualifier Unit D %Rec Limits RPD Limit 0.442 mg/Kg 103 87 -111 7 20 Client Sample ID: Method Blank Prep Type: Total/NA Prep Batch: 613334 RL MDL Unit D Prepared Analyzed Dil Fac 0.017 0.0055 mg/Kg 05/22/23 15:20 05/22/23 23:20 1 Client Sample ID: Lab Control Sample Prep Type: Total/NA Prep Batch: 613334 LCS LCS %Rec Result Qualifier Unit D %Rec Limits 0.326 mg/Kg 98 87 -111 Client Sample ID: DU07-230502-Native Prep Type: Total/NA Prep Batch: 613334 MS MS %Rec Result Qualifier Unit D %Rec Limits 0.402 mg/Kg 105 87 -111 Client Sample ID: DU07-230502-Native Prep Type: Total/NA Prep Batch: 613334 MSD MSD %Rec RPD Result Qualifier Unit D %Rec Limits RPD Limit 0.396 mg/Kg 106 87 -111 1 20 Eurofins Denver Page 119 of 160 6/1/2023 QC Sample Results Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Method: 7471 B - Mercury (CVAA) LLab Sample ID: 280-176200-14 MS Matrix: Solid Analysis Batch: 613486 Sample Sample Analyte Result Qualifier LMercury 0.049 Lab Sample ID: 280-176200-14 MSD Matrix: Solid Analysis Batch: 613486 Sample Sample Analyte Result Qualifier Mercury 0.049 Lab Sample ID: 280-176200-15 MS Matrix: Solid Analysis Batch: 613486 Sample Sample Analyte Result Qualifier Mercury 0.036 Lab Sample ID: 280-176200-15 MSD Matrix: Solid Analysis Batch: 613486 Sample Sample Analyte Result Qualifier Mercury 0.036 Method: D 2216 - Percent Moisture Lab Sample ID: 280-176200-4 DU Matrix: Solid Analysis Batch: 611852 Sample Sample Analyte Result Qualifier Percent Moisture 16.5 Percent Solids 83.5 Lab Sample ID: 280-176200-7 DU Matrix: Solid Analysis Batch: 612817 Sample Sample Analyte Result Qualifier Percent Moisture 14.0 Percent Solids 86.0 Job ID: 280-176200-1 Client Sample ID: DU06-SU03-230504-0.5 Prep Type: Total/NA Prep Batch: 613334 Spike MS MS %Rec Added Result Qualifier Unit D %Rec Limits 0.357 0.420 mg/Kg 104 87 -111 Client Sample ID: DU06-SU03-230504-0.5 Prep Type: Total/NA Prep Batch: 613334 Spike MSD MSD %Rec RPD Added Result Qualifier Unit D %Rec Limits RPD Limit 0.364 0.421 mg/Kg 102 87 -111 0 20 Client Sample ID: DU01-230504-0.5 Prep Type: Total/NA Prep Batch: 613334 Spike MS MS %Rec Added Result Qualifier Unit D %Rec Limits 0.377 0.438 mg/Kg 107 87 -111 Client Sample ID: DU01-230504-0.5 Prep Type: Total/NA Prep Batch: 613334 Spike MSD MSD %Rec RPD Added Result Qualifier Unit D %Rec Limits RPD Limit 0.351 0.418 mg/Kg 109 87 -111 5 20 Client Sample ID: DU05-SU06-230505-COMP02 Prep Type: Total/NA DU DU Result Qualifier Unit 17.2 82.8 % DU DU Result Qualifier Unit 14.7 % 85.3 % RPD D RPD Limit 4 20 0.8 20 Client Sample ID: B03-17 Prep Type: Total/NA RPD D RPD Limit 5 20 0.8 20 Eurofins Denver Page 120 of 160 6/1/2023 QC Association Summary Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon GC/MS VOA Analysis Batch: 425808 Job ID: 280-176200-1 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-176200-1 DU05-SU05-230505-Pond01 Total/NA Water NWTPH-Gx 280-176200-2 DU05-SU05-230505- Pond 02 Total/NA Water NWTPH-Gx 280-176200-5 B03-19GW Total/NA Water NWTPH-Gx 280-176200-6 B02-15GW Total/NA Water NWTPH-Gx MB 580-425808/6 Method Blank Total/NA Water NWTPH-Gx LCS 580-425808/9 Lab Control Sample Total/NA Water NWTPH-Gx LCSD 580-425808/10 Lab Control Sample Dup Total/NA Water NWTPH-Gx Prep Batch: 425990 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-176200-3 DU05-SU06-230505-COMP01 Total/NA Solid 5035 280-176200-4 DU05-SU06-230505-COMP02 Total/NA Solid 5035 280-176200-7 B03-17 Total/NA Solid 5035 280-176200-8 B02-8 Total/NA Solid 5035 Analysis Batch: 426049 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-176200-3 DU05-SU06-230505-COMP01 Total/NA Solid NWTPH-Gx 425990 280-176200-4 DU05-SU06-230505-COMP02 Total/NA Solid NWTPH-Gx 425990 280-176200-7 B03-17 Total/NA Solid NWTPH-Gx 425990 280-176200-8 B02-8 Total/NA Solid NWTPH-Gx 425990 Analysis Batch: 612565 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-176200-6 602-15GW Total/NA Water 8260D MB 280-612565/7 Method Blank Total/NA Water 8260D LCS 280-612565/1002 Lab Control Sample Total/NA Water 8260D LCSD 280-612565/4 Lab Control Sample Dup Total/NA Water 8260D 280-175962-B-4 MS Matrix Spike Total/NA Water 8260D 280-175962-C-4 MSD Matrix Spike Duplicate Total/NA Water 8260D Analysis Batch: 612584 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-176200-5 B03-19GW Total/NA Water 8260D MB 280-612584/7 Method Blank Total/NA Water 8260D LCS 280-612584/1002 Lab Control Sample Total/NA Water 8260D LCSD 280-612584/4 Lab Control Sample Dup Total/NA Water 8260D 280-176296-W-3 MS Matrix Spike Total/NA Water 8260D 280-176296-W-3 MSD Matrix Spike Duplicate Total/NA Water 8260D Analysis Batch: 612868 li Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-176200-1 DU05-SU05-230505-Pond01 Total/NA Water 8260D 280-176200-2 DU05-SU05-230505-Pond02 Total/NA Water 8260D MB 280-612868/7 Method Blank Total/NA Water 8260D LCS 280-612868/1002 Lab Control Sample Total/NA Water 8260D LCSD 280-612868/4 Lab Control Sample Dup Total/NA Water 8260D 240-184832-D-31 MS Matrix Spike Total/NA Water 8260D 240-184832-1-31 MSD Matrix Spike Duplicate Total/NA Water 8260D Eurofins Denver Page 121 of 160 6/1/2023 QC Association Summary Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon GC/MS VOA Analysis Batch: 612891 Lab Sample ID Client Sample ID Prep Type Matrix 280-176200-9 TB-230507-01 Total/NA Water 280-176200-19 TB-230507-02 Total/NA Water MB 280-612891/7 Method Blank Total/NA Water LCS 280-612891/1002 Lab Control Sample Total/NA Water LCSD 280-612891/4 Lab Control Sample Dup Total/NA Water GC/MS Semi VOA Job ID: 280-176200-1 Method 8260D 8260D 8260D 8260D 8260D Prep Batch Prep Batch: 611929 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-176200-5 B03-19GW Total/NA Water 3510C 280-176200-6 B02-15GW Total/NA Water 3510C MB 280-611929/1-A Method Blank Total/NA Water 3510C LCS 280-611929/2-A Lab Control Sample Total/NA Water 3510C 280-176115-A-2-B MS Matrix Spike Total/NA Water 3510C 280-176115-A-2-C MSD Matrix Spike Duplicate Total/NA Water 3510C ISM Prep Batch: 611987 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-176200-10 DU07-230502-Native Total/NA Solid Increment, prep 280-176200-11 DU07-230502-Fill Total/NA Solid Increment, prep 280-176200-13 DU04-SU01-230504-0.5 Total/NA Solid Increment, prep 280-176200-14 DU06-SU03-230504-0.5 Total/NA Solid Increment, prep 280-176200-15 DU01-230504-0.5 Total/NA Solid Increment, prep 280-176200-16 DU01-230504-0.5-Rep1 Total/NA Solid Increment, prep 280-176200-17 DU01-230504-0.5-Rep2 Total/NA Solid Increment, prep 280-176200-18 DU02-230504-0.5 Total/NA Solid Increment, prep 280-176200-18 - DL DU02-230504-0.5 Total/NA Solid Increment, prep 280-176200-20 DU06-SU04-230505-0.5 Total/NA Solid Increment, prep 280-176200-21 DU03-230505-0.5 Total/NA Solid Increment, prep 280-176200-22 DU03-230505-0.5-Rep1 Total/NA Solid Increment, prep 280-176200-23 DU03-230505-0.5-Rep2 Total/NA Solid Increment, prep 280-176200-13 MS DU04-SU01-230504-0.5 Total/NA Solid Increment, prep 280-176200-13 MSD DU04-SU01-230504-0.5 Total/NA Solid Increment, prep 280-176200-15 MS DU01-230504-0.5 Total/NA Solid Increment, prep 280-176200-15 MSD DU01-230504-0.5 Total/NA Solid Increment, prep Prep Batch: 612087 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-176200-1 DU05-SU05-230505-Pond01 Total/NA Water 3510C 280-176200-2 DU05-SU05-230505-Pond02 Total/NA Water 3510C MB 280-612087/1-A Method Blank Total/NA Water 3510C LCS 280-612087/2-A Lab Control Sample Total/NA Water 3510C LCSD 280-61208713-A Lab Control Sample Dup Total/NA Water 3510C 280-176284-E-4-A MS Matrix Spike Total/NA Water 3510C 280-176284-E-4-B MSD Matrix Spike Duplicate Total/NA Water 3510C Prep Batch: 612097 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-176200-3 DU05-SU06-230505-COMP01 Total/NA Solid 3546 280-176200-4 DU05-SU06-230505-COMP02 Total/NA Solid 3546 Eurofins Denver Page 122 of 160 6/1/2023 QC Association Summary Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon GC/MS Semi VOA (Continued) Prep Batch: 612097 (Continued) Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch MB 280-612097/1-A Method Blank Total/NA Solid 3546 LCS 280-612097/2-A Lab Control Sample Total/NA Solid 3546 280-176141-B-1-B MS Matrix Spike Total/NA Solid 3546 280-176141-B-1-C MSD Matrix Spike Duplicate Total/NA Solid 3546 Analysis Batch: 612138 F Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-176200-5 B03-19GW Total/NA Water 8270D SIM 611929 280-176200-6 B02-15GW Total/NA Water 8270D SIM 611929 MB 280-611929/1-A Method Blank Total/NA Water 8270D SIM 611929 LCS 280-611929/2-A Lab Control Sample Total/NA Water 8270D SIM 611929 280-176115-A-2-B MS Matrix Spike Total/NA Water 8270D SIM 611929 280-176115-A-2-C MSD Matrix Spike Duplicate Total/NA Water 8270D SIM 611929 Analysis Batch: 612216 Lab Sample ID Client Sample ID 280-176200-1 DU05-SU05-230505-Pond01 280-176200-2 DU05-SU05-230505-Pond02 MB 280-612087/1-A Method Blank LCS 280-612087/2-A Lab Control Sample LCSD 280-612087/3-A Lab Control Sample Dup 280-176284-E-4-A MS Matrix Spike 280-176284-E-4-B MSD Matrix Spike Duplicate Prep Batch: 612481 Prep Type Matrix Method Prep Batch Total/NA Water 8270D SIM 612087 Total/NA Water 8270D SIM 612087 Total/NA Water 8270D SIM 612087 Total/NA Water 8270D SIM 612087 Total/NA Water 8270D SIM 612087 Total/NA Water 8270D SIM 612087 Total/NA Water 8270D SIM 612087 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-176200-7 B03-17 Total/NA Solid 3546 280-176200-8 B02-8 Total/NA Solid 3546 280-176200-10 DU07-230502-Native Total/NA Solid 3546 611987 280-176200-11 DU07-230502-Fill Total/NA Solid 3546 611987 280-176200-13 DU04-SU01-230504-0.5 Total/NA Solid 3546 611987 280-176200-14 DU06-SU03-230504-0.5 Total/NA Solid 3546 611987 280-176200-18 - DL DU02-230504-0.5 Total/NA Solid 3546 611987 280-176200-18 DU02-230504-0.5 Total/NA Solid 3546 611987 280-176200-20 DU06-SU04-230505-0.5 Total/NA Solid 3546 611987 280-176200-21 DU03-230505-0.5 Total/NA Solid 3546 611987 280-176200-22 DU03-230505-0.5-Rep1 Total/NA Solid 3546 611987 280-176200-23 DU03-230505-0.5-Rep2 Total/NA Solid 3546 611987 MB 280-612481/1-A Method Blank Total/NA Solid 3546 LCS 280-612481/2-A Lab Control Sample Total/NA Solid 3546 280-176200-13 MS DU04-SU01-230504-0.5 Total/NA Solid 3546 611987 280-176200-13 MSD DU04-SU01-230504-0.5 Total/NA Solid 3546 611987 Prep Batch: 612492 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-176200-15 DU01-230504-0.5 Total/NA Solid 3550C 611987 280-176200-16 DU01-230504-0.5-Rep1 Total/NA Solid 3550C 611987 280-176200-17 DU01-230504-0.5-Rep2 Total/NA Solid 3550C 611987 MB 280-612492/1-A Method Blank Total/NA Solid 3550C LCS 280-612492/2-A Lab Control Sample Total/NA Solid 3550C 280-176200-15 MS DU01-230504-0.5 Total/NA Solid 3550C 611987 Eurofins Denver Page 123 of 160 6/1 /2023 QC Association Summary Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon GC/MS Semi VOA (Continued) Prep Batch: 612492 (Continued) Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-176200-15 MSD DU01-230504-0.5 Total/NA Solid 3550C 611987 Analysis Batch: 612597 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-176200-7 B03-17 Total/NA Solid 8270D SIM 612481 280-176200-8 B02-8 Total/NA Solid 8270D SIM 612481 280-176200-10 DU07-230502-Native Total/NA Solid 8270D SIM 612481 280-176200-11 DU07-230502-Fill Total/NA Solid 8270D SIM 612481 280-176200-13 DU04-SU01-230504-0.5 Total/NA Solid 8270D SIM 612481 280-176200-14 DU06-SU03-230504-0.5 Total/NA Solid 8270D SIM 612481 280-176200-18 DU02-230504-0.5 Total/NA Solid 8270D SIM 612481 280-176200-20 DU06-SU04-230505-0.5 Total/NA Solid 8270D SIM 612481 280-176200-21 DU03-230505-0.5 Total/NA Solid 8270D SIM 612481 280-176200-22 DU03-230505-0.5-Rep1 Total/NA Solid 8270D SIM 612481 280-176200-23 DU03-230505-0.5-Rep2 Total/NA Solid 8270D SIM 612481 MB 280-612481/1-A Method Blank Total/NA Solid 8270D SIM 612481 LCS 280-612481/2-A Lab Control Sample Total/NA Solid 8270D SIM 612481 280-176200-13 MS DU04-SU01-230504-0.5 Total/NA Solid 8270D SIM 612481 280-176200-13 MSD DU04-SU01-230504-0.5 Total/NA Solid 8270D SIM 612481 Analysis Batch: 612600 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-176200-3 DU05-SU06-230505-COMP01 Total/NA Solid 8270D SIM 612097 280-176200-4 DU05-SU06-230505-COMP02 Total/NA Solid 8270D SIM 612097 MB 280-612097/1-A Method Blank Total/NA Solid 8270D SIM 612097 LCS 280-612097/2-A Lab Control Sample Total/NA Solid 8270D SIM 612097 280-176141-B-1-13 MS Matrix Spike Total/NA Solid 8270D SIM 612097 L 280-176141-B-1-C MSD Matrix Spike Duplicate Total/NA Solid 8270D SIM 612097 Analysis Batch: 612910 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-176200-15 DU01-230504-0.5 Total/NA Solid 8270D 612492 280-176200-16 DU01-230504-0.5-Rep1 Total/NA Solid 8270D 612492 280-176200-17 DU01-230504-0.5-Rep2 Total/NA Solid 8270D 612492 MB 280-612492/1-A Method Blank Total/NA Solid 8270D 612492 LCS 280-612492/2-A Lab Control Sample Total/NA Solid 8270D 612492 280-176200-15 MS DU01-230504-0.5 Total/NA Solid 8270D 612492 280-176200-15 MSD DU01-230504-0.5 Total/NA Solid 8270D 612492 Analysis Batch: 613072 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-176200-18 - DL DU02-230504-0.5 Total/NA Solid 8270D SIM 612481 GC Semi VOA Prep Batch: 425673 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-176200-1 DU05-SU05-230505-Pond01 Total/NA Water 3510C 280-176200-2 DU05-SU05-230505-Pond02 Total/NA Water 3510C 280-176200-5 B03-19GW Total/NA Water 3510C 280-176200-6 B02-15GW Total/NA Water 3510C Eurofins Denver Page 124 of 160 6/1/2023 QC Association Summary Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon GC Semi VOA (Continued) Prep Batch: 425673 (Continued) j Lab Sample ID Client Sample ID Prep Type Matrix MB 580-425673/1-A Method Blank Total/NA Water LCS 580-425673/2-A Lab Control Sample Total/NA Water LCSD 580-425673/3-A Lab Control Sample Dup Total/NA Water Analysis Batch: 425687 Lab Sample ID 280-176200-1 280-176200-2 280-176200-5 280-176200-6 MB 580-425673/1-A LCS 580-425673/2-A LCSD 580-425673/3-A Prep Batch: 425843 Client Sample ID DU 05-SU05-230505-Pond 01 DU05-SU05-230505-Pond02 B03-19GW B02-15GW Method Blank Lab Control Sample Lab Control Sample Dup Job ID: 280-176200-1 Method Prep Batch 3510C 3510C 3510C Prep Type Matrix Method Prep Batch Total/NA Water NWTPH-Dx 425673 Total/NA Water NWTPH-Dx 425673 Total/NA Water NWTPH-Dx 425673 Total/NA Water NWTPH-Dx 425673 Total/NA Water NWTPH-Dx 425673 Total/NA Water NWTPH-Dx 425673 Total/NA Water NWTPH-Dx 425673 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-176200-3 DU05-SU06-230505-COMP01 Total/NA Solid 3546 280-176200-4 DU05-SU06-230505-COMP02 Total/NA Solid 3546 280-176200-7 B03-17 Total/NA Solid 3546 280-176200-8 B02-8 Total/NA Solid 3546 MB 580-425843/1-A Method Blank Total/NA Solid 3546 LCS 580-425843/2-A Lab Control Sample Total/NA Solid 3546 LCSD 580-425843/3-A Lab Control Sample Dup Total/NA Solid 3546 280-176200-3 DU DU05-SU06-230505-COMP01 Total/NA Solid 3546 Analysis Batch: 425959 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-176200-3 DU05-SU06-230505-COMP01 Total/NA Solid NWTPH-Dx 425843 280-176200-4 DU05-SU06-230505-COMP02 Total/NA Solid NWTPH-Dx 425843 280-176200-7 B03-17 Total/NA Solid NWTPH-Dx 425843 280-176200-8 B02-8 Total/NA Solid NWTPH-Dx 425843 MB 580-425843/1-A Method Blank Total/NA Solid NWTPH-Dx 425843 LCS 580-425843/2-A Lab Control Sample Total/NA Solid NWTPH-Dx 425843 LCSD 580-425843/3-A Lab Control Sample Dup Total/NA Solid NWTPH-Dx 425843 L 280-176200-3 DU DU05-SU06-230505-COMP01 Total/NA Solid NWTPH-Dx 425843 Prep Batch: 426406 Lab Sample ID Client Sample ID Prep Type Matrix Method 280-176200-10 DU07-230502-Native Total/NA Solid 3546 j 280-176200-11 DU07-230502-Fill Total/NA Solid 3546 280-176200-13 DU04-SU01-230504-0.5 Total/NA Solid 3546 280-176200-14 DU06-SU03-230504-0.5 Total/NA Solid 3546 280-176200-15 DU01-230504-0.5 Total/NA Solid 3546 280-176200-16 DU01-230504-0.5-Rep1 Total/NA Solid 3546 280-176200-17 DU01-230504-0.5-Rep2 Total/NA Solid 3546 280-176200-18 DU02-230504-0.5 Total/NA Solid 3546 280-176200-20 DU06-SU04-230505-0.5 Total/NA Solid 3546 280-176200-21 DU03-230505-0.5 Total/NA Solid 3546 280-176200-22 DU03-230505-0.5-Rep1 Total/NA Solid 3546 280-176200-23 DU03-230505-0.5-Rep2 Total/NA Solid 3546 MB 580-426406/1-A Method Blank Total/NA Solid 3546 Prep Batch Eurofins Denver Page 125 of 160 6/1 /2023 QC Association Summary Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon GC Semi VOA (Continued) Prep Batch: 426406 (Continued) Lab Sample ID Client Sample ID Prep Type Matrix Job ID: 280-176200-1 Method Prep Batch LCS 580-426406/2-A Lab Control Sample Total/NA Solid 3546 LCSD 580-426406/3-A Lab Control Sample Dup Total/NA Solid 3546 280-176200-10 DU DU07-230502-Native Total/NA Solid 3546 280-176200-21 DU DU03-230505-0.5 Total/NA Solid 3546 Analysis Batch: 427371 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-176200-10 DU07 230502-Native Total/NA Solid NWTPH-Dx 426406 280-176200-11 DU07-230502-Fill Total/NA Solid NWTPH-Dx 426406 280-176200-13 DU04-SU01-230504-0.5 Total/NA Solid NWTPH-Dx 426406 280-176200-14 DU06-SU03-230504-0.5 Total/NA Solid NWTPH-Dx 426406 280-176200-15 DU01-230504-0.5 Total/NA Solid NWTPH-Dx 426406 280-176200-16 DU01-230504-0.5-Rep1 Total/NA Solid NWTPH-Dx 426406 280-176200-17 DU01-230504-0.5-Rep2 Total/NA Solid NWTPH-Dx 426406 280-176200-18 DU02-230504-0.5 Total/NA Solid NWTPH-Dx 426406 280-176200-20 DU06-SU04-230505-0.5 Total/NA Solid NWTPH-Dx 426406 280-176200-21 DU03-230505-0.5 Total/NA Solid NWTPH-Dx 426406 280-176200-22 DU03-230505-0.5-Rep1 Total/NA Solid NWTPH-Dx 426406 280-176200-23 DU03-230505-0.5-Rep2 Total/NA Solid NWTPH-Dx 426406 MB 580-426406/1-A Method Blank Total/NA Solid NWTPH-Dx 426406 LCS 580-426406/2-A Lab Control Sample Total/NA Solid NWTPH-Dx 426406 LCSD 580-426406/3-A Lab Control Sample Dup Total/NA Solid NWTPH-Dx 426406 280-176200-10 DU DU07-230502-Native Total/NA Solid NWTPH-Dx 426406 280-176200-21 DU DU03-230505-0.5 Total/NA Solid NWTPH-Dx 426406 ISM Prep Batch: 611987 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-176200-10 DU07-230502-Native Total/NA Solid Increment, prep 280-176200-11 DI07-230502-Fill Total/NA Solid Increment, prep 280-176200-12 DU04-SU02-230504-0.5 Total/NA Solid Increment, prep 280-176200-13 DU04-SU01-230504-0.5 Total/NA Solid Increment, prep 280-176200-14 DU06-SU03-230504-0.5 Total/NA Solid Increment, prep 280-176200-20 DU06-SU04-230505-0.5 Total/NA Solid Increment, prep 280-176200-14 MS DU06-SU03-230504-0.5 Total/NA Solid Increment, prep 280-176200-14 MSD DU06-SU03-230504-0.5 Total/NA Solid Increment, prep Prep Batch: 612472 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-176200-3 DU05-SU06-230505-COMP01 Total/NA Solid 3546 280-176200-4 DU05-SU06-230505-COMP02 Total/NA Solid 3546 280-176200-10 DU07-230502-Native Total/NA Solid 3546 611987 280-176200-11 DU07-230502-Fill Total/NA Solid 3546 611987 280-176200-12 DU04-SU02-230504-0.5 Total/NA Solid 3546 611987 280-176200-13 DU04-SU01-230504-0.5 Total/NA Solid 3546 611987 280-176200-14 DU06-SU03-230504-0.5 Total/NA Solid 3546 611987 280-176200-20 DU06-SU04-230505-0.5 Total/NA Solid 3546 611987 MB 280-612472/1-A Method Blank Total/NA Solid 3546 LCS 280-612472/2-A Lab Control Sample Total/NA Solid 3546 280-176200-14 MS DU06-SU03-230504-0.5 Total/NA Solid 3546 611987 280-176200-14 MSD DU06-SU03-230504-0.5 Total/NA Solid 3546 611987 Eurofins Denver Page 126 of 160 6/1/2023 QC Association Summary Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon GC Semi VOA Analysis Batch: 612755 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-176200-3 DU05-SU06-230505-COMP01 Total/NA Solid 8082A 612472 280-176200-4 DU05-SU06-230505-COMP02 Total/NA Solid 8082A 612472 280-176200-10 DI07-230502-Native Total/NA Solid 8082A 612472 280-176200-11 DU07-230502-Fill Total/NA Solid 8082A 612472 280-176200-12 DU04-SU02-230504-0.5 Total/NA Solid 8082A 612472 280-176200-13 DU04-SU01-230504-0.5 Total/NA Solid 8082A 612472 280-176200-14 DU06-SU03-230504-0.5 Total/NA Solid 8082A 612472 280-176200-20 DU06-SU04-230505-0.5 Total/NA Solid 8082A 612472 MB 280-612472/1-A Method Blank Total/NA Solid 8082A 612472 LCS 280-612472/2-A Lab Control Sample Total/NA Solid 8082A 612472 280-176200-14 MS DU06-SU03-230504-0.5 Total/NA Solid 8082A 612472 280-176200-14 MSD DU06-SU03-230504-0.5 Total/NA Solid 8082A 612472 Metals Prep Batch: 611911 Lab Sample ID Client Sample ID Prep Type Matrix Method 280-176200-1 DU05-SU05-230505-Pond01 Dissolved Water 3005A 280-176200-2 DU05-SU05-230505-Pond02 Dissolved Water 3005A 280-176200-5 B03-19GW Dissolved Water 3005A 280-176200-6 B02-15GW Dissolved Water 3005A MB 280-611911/1-A Method Blank Total Recoverable Water 3005A LCS 280-611911/2-A Lab Control Sample Total Recoverable Water 3005A LCSD 280-611911/3-A Lab Control Sample Dup Total Recoverable Water 3005A 280-176213-M-1-B MS Matrix Spike Dissolved Water 3005A 280-176213-M-1-C MSD Matrix Spike Duplicate Dissolved Water 3005A ISM Prep Batch: 611987 Prep Batch Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-176200-10 DU07-230502-Native Total/NA Solid Increment, prep 280-176200-11 DI07-230502-Fill Total/NA Solid Increment, prep 280-176200-12 DU04-SU02-230504-0.5 Total/NA Solid Increment, prep 280-176200-13 DU04-SU01-230504-0.5 Total/NA Solid Increment, prep 280-176200-14 DU06-SU03-230504-0.5 Total/NA Solid Increment, prep 280-176200-15 DU01-230504-0.5 Total/NA Solid Increment, prep 280-176200-16 DU01-230504-0.5-Rep1 Total/NA Solid Increment, prep 280-176200-17 DU01-230504-0.5-Rep2 Total/NA Solid Increment, prep 280-176200-18 DU02-230504-0.5 Total/NA Solid Increment, prep 280-176200-20 DU06-SU04-230505-0.5 Total/NA Solid Increment, prep 280-176200-21 DU03-230505-0.5 Total/NA Solid Increment, prep 280-176200-22 DU03-230505-0.5-Rep1 Total/NA Solid Increment, prep 280-176200-23 DU03-230505-0.5-Rep2 Total/NA Solid Increment, prep 280-176200-10 MS DI07-230502-Native Total/NA Solid Increment, prep 280-176200-10 MSD DI07-230502-Native Total/NA Solid Increment, prep 280-176200-13 MS DU04-SU01-230504-0.5 Total/NA Solid Increment, prep 280-176200-13 MSD DU04-SU01-230504-0.5 Total/NA Solid Increment, prep 280-176200-14 MS DU06-SU03-230504-0.5 Total/NA Solid Increment, prep 280-176200-14 MSD DU06-SU03-230504-0.5 Total/NA Solid Increment, prep 280-176200-15 MS DU01-230504-0.5 Total/NA Solid Increment, prep 280-176200-15 MSD DU01-230504-0.5 Total/NA Solid Increment, prep Eurofins Denver Page 127 of 160 6/1/2023 QC Association Summary Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Metals Prep Batch: 612037 FLab Sample ID Client Sample ID 280-176200-3 DU05-SU06-230505-COMP01 280-176200-4 DU05-SU06-230505-COMP02 MB 280-612037/1-A Method Blank LCS 280-612037/2-A Lab Control Sample 180-156210-D-1-B MS Matrix Spike 180-156210-D-1-C MSD Matrix Spike Duplicate Prep Batch: 612386 Job ID: 280-176200-1 U Prep Type Matrix Method Total/NA Solid 3050B Total/NA Solid 3050E Total/NA Solid 3050E Total/NA Solid 3050B Total/NA Solid 3050B Total/NA Solid 3050B Prep Batch Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-176200-10 DU07-230502-Native Total/NA Solid 3050E MOD 611987 280-176200-11 DU07-230502-Fill Total/NA Solid 3050E MOD 611987 280-176200-13 DU04-SU01-230504-0.5 Total/NA Solid 3050B MOD 611987 280-176200-14 DU06-SU03-230504-0.5 Total/NA Solid 3050E MOD 611987 280-176200-15 DU01-230504-0.5 Total/NA Solid 3050B MOD 611987 280-176200-16 DU01-230504-0.5-Rep1 Total/NA Solid 3050E MOD 611987 280-176200-17 DU01-230504-0.5-Rep2 Total/NA Solid 3050B MOD 611987 280-176200-18 DU02-230504-0.5 Total/NA Solid 3050B MOD 611987 280-176200-20 DU06-SU04-230505-0.5 Total/NA Solid 3050E MOD 611987 280-176200-21 DU03-230505-0.5 Total/NA Solid 3050E MOD 611987 280-176200-22 DU03-230505-0.5-Rep1 Total/NA Solid 3050B MOD 611987 280-176200-23 DU03-230505-0.5-Rep2 Total/NA Solid 3050E MOD 611987 MB 280-612386/1-A Method Blank Total/NA Solid 3050E MOD LCS 280-612386/2-A Lab Control Sample Total/NA Solid 3050E MOD 280-176200-10 MS DU07-230502-Native Total/NA Solid 3050B MOD 611987 280-176200-10 MSD DU07-230502-Native Total/NA Solid 3050E MOD 611987 280-176200-13 MS DU04-SU01-230504-0.5 Total/NA Solid 3050B MOD 611987 280-176200-13 MSD DU04-SU01-230504-0.5 Total/NA Solid 3050B MOD 611987 280-176200-14 MS DU06-SU03-230504-0.5 Total/NA Solid 3050E MOD 611987 280-176200-14 MSD DU06-SU03-230504-0.5 Total/NA Solid 3050E MOD 611987 280-176200-15 MS DU01-230504-0.5 Total/NA Solid 3050B MOD 611987 280-176200-15 MSD DU01-230504-0.5 Total/NA Solid 3050B MOD 611987 Analysis Batch: 612415 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-176200-1 DU05-SU05-230505-Pond01 Dissolved Water 601OD 611911 280-176200-2 DU05-SU05-230505-Pond02 Dissolved Water 6010D 611911 280-176200-5 B03-19GW Dissolved Water 6010D 611911 280-176200-6 B02-15GW Dissolved Water 601OD 611911 MB 280-611911/1-A Method Blank Total Recoverable Water 6010D 611911 LCS 280-611911/2-A Lab Control Sample Total Recoverable Water 6010D 611911 LCSD 280-611911/3-A Lab Control Sample Dup Total Recoverable Water 6010D 611911 280-176213-M-1-B MS Matrix Spike Dissolved Water 6010D 611911 280-176213-M-1-C MSD Matrix Spike Duplicate Dissolved Water 6010D 611911 Prep Batch: 612438 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-176200-7 B03-17 Total/NA Solid 3050E 280-176200-8 B02-8 Total/NA Solid 3050B MB 280-612438/1-A Method Blank Total/NA Solid 3050E LCS 280-612438/2-A Lab Control Sample Total/NA Solid 3050E 280-176468-A-1-B MS Matrix Spike Total/NA Solid 3050E Eurofins Denver [13' Page 128 of 160 6/ 1 /2023 QC Association Summary Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon Metals (Continued) Prep Batch: 612438 (Continued) Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-176468-A-1-C MSD Matrix Spike Duplicate Total/NA Solid 3050B Analysis Batch: 612533 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-176200-3 DU05-SU06-230505-COMP01 Total/NA Solid 601OD 612037 280-176200-4 DU05-SU06-230505-COMP02 Total/NA Solid 6010D 612037 MB 280-612037/1-A Method Blank Total/NA Solid 6010D 612037 LCS 280-612037/2-A Lab Control Sample Total/NA Solid 6010D 612037 180-156210-D-1-B MS Matrix Spike Total/NA Solid 6010D 612037 180-156210-D-1-C MSD Matrix Spike Duplicate Total/NA Solid 6010D 612037 Analysis Batch: 613158 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-176200-7 B03-17 Total/NA Solid 6010D 612438 - 280-176200-8 B02-8 Total/NA Solid 6010D 612438 MB 280-612438/1-A Method Blank Total/NA Solid 6010D 612438 LCS 280-612438/2-A Lab Control Sample Total/NA Solid 6010D 612438 280-176468-A-1-B MS Matrix Spike Total/NA Solid 6010D 612438 280-176468-A-1-C MSD Matrix Spike Duplicate Total/NA Solid 6010D 612438 Prep Batch: 613328 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-176200-3 DU05-SU06-230505-COMP01 Total/NA Solid 7471 B 280-176200-4 DU05-SU06-230505-COMP02 Total/NA Solid 7471 B MB 280-613328/1-A Method Blank Total/NA Solid 7471 B LCS 280-61332812-A Lab Control Sample Total/NA Solid 7471 B 280-176120-B-1-B MS Matrix Spike Total/NA Solid 7471 B 280-176120-B-1-C MSD Matrix Spike Duplicate Total/NA Solid 7471 B Prep Batch: 613334 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-176200-10 DU07-230502-Native Total/NA Solid 7471 B 611987 280-176200-11 DI07-230502-Fill Total/NA Solid 7471 B 611987 280-176200-12 DU04-SU02-230504-0.5 Total/NA Solid 7471 B 611987 280-176200-14 DU06-SU03-230504-0.5 Total/NA Solid 7471 B 611987 280-176200-15 DU01-230504-0.5 Total/NA Solid 7471B 611987 280-176200-16 DU01-230504-0.5-Rep1 Total/NA Solid 7471E 611987 280-176200-17 DU01-230504-0.5-Rep2 Total/NA Solid 7471B 611987 280-176200-18 DU02-230504-0.5 Total/NA Solid 7471 B 611987 280-176200-20 DU06-SU04-230505-0.5 Total/NA Solid 7471 B 611987 280-176200-21 DU03-230505-0.5 Total/NA Solid 7471 B 611987 280-176200-22 DU03-230505-0.5-Rep1 Total/NA Solid 7471E 611987 280-176200-23 DU03-230505-0.5-Rep2 Total/NA Solid 7471 B 611987 MB 280-613334/1-A Method Blank Total/NA Solid 7471B LCS 280-613334/2-A Lab Control Sample Total/NA Solid 7471 B 280-176200-10 MS DU07-230502-Native Total/NA Solid 7471 B 611987 280-176200-10 MSD DU07-230502-Native Total/NA Solid 7471 B 611987 280-176200-14 MS DU06-SU03-230504-0.5 Total/NA Solid 7471 B 611987 280-176200-14 MSD DU06-SU03-230504-0.5 Total/NA Solid 7471 B 611987 280-176200-15 MS DU01-230504-0.5 Total/NA Solid 7471E 611987 280-176200-15 MSD DU01-230504-0.5 Total/NA Solid 7471B 611987 Eurofins Denver Page 129 of 160 6/1/2023 QC Association Summary Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Metals Analysis Batch: 613486 Job ID: 280-176200-1 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-176200-3 DU05-SU06-230505-COMP01 Total/NA Solid 7471 B 613328 280-176200-4 DU05-SU06-230505-COMP02 Total/NA Solid 7471E 613328 280-176200-10 DU07-230502-Native Total/NA Solid 7471B 613334 280-176200-11 DU07-230502-Fill Total/NA Solid 7471B 613334 280-176200-12 DU04-SU02-230504-0.5 Total/NA Solid 7471B 613334 280-176200-14 DU06-SU03-230504-0.5 Total/NA Solid 7471B 613334 280-176200-15 DU01-230504-0.5 Total/NA Solid 7471E 613334 280-176200-16 DU01-230504-0.5-Rep1 Total/NA Solid 7471B 613334 280-176200-17 DU01-230504-0.5-Rep2 Total/NA Solid 7471E 613334 280-176200-18 DU02-230504-0.5 Total/NA Solid 7471B 613334 280-176200-20 DU06-SU04-230505-0.5 Total/NA Solid 7471 B 613334 280-176200-21 DU03-230505-0.5 Total/NA Solid 7471B 613334 280-176200-22 DU03-230505-0.5-Rep1 Total/NA Solid 7471B 613334 280-176200-23 DU03-230505-0.5-Rep2 Total/NA Solid 7471B 613334 MB 280-613328/1-A Method Blank Total/NA Solid 7471B 613328 MB 280-613334/1 -A Method Blank Total/NA Solid 7471E 613334 LCS 280-613328/2-A Lab Control Sample Total/NA Solid 7471B 613328 LCS 280-613334/2-A Lab Control Sample Total/NA Solid 7471B 613334 280-176120-B-1-B MS Matrix Spike Total/NA Solid 7471B 613328 280-176120-B-1-C MSD Matrix Spike Duplicate Total/NA Solid 7471B 613328 280-176200-10 MS DU07-230502-Native Total/NA Solid 7471B 613334 280-176200-10 MSD DU07-230502-Native Total/NA Solid 7471B 613334 280-176200-14 MS DU06-SU03-230504-0.5 Total/NA Solid 7471B 613334 280-176200-14 MSD DU06-SU03-230504-0.5 Total/NA Solid 7471B 613334 280-176200-15 MS DU01-230504-0.5 Total/NA Solid 7471B 613334 280-176200-15 MSD DU01-230504-0.5 TotaUNA Solid 7471B 613334 Prep Batch: 613510 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-176200-1 DU05-SU05-230505-Pond01 Dissolved Water 7470A 280-176200-2 DU05-SU05-230505-Pond02 Dissolved Water 7470A MB 280-613510/1-A Method Blank Total/NA Water 7470A LCS 280-613510/2-A Lab Control Sample Total/NA Water 7470A LCSD 280-613510/3-A Lab Control Sample Dup Total/NA Water 7470A 280-176114-A-2-H MS Matrix Spike Total/NA Water 7470A 280-176114-A-2-1 MSD Matrix Spike Duplicate Total/NA Water 7470A Analysis Batch: 613592 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280176200-10 DU07-230502-Native Total/NA Solid 6010D 612386 280-176200-11 DU07-230502-Fill Total/NA Solid 601OD 612386 280-176200-13 DU04-SU01-230504-0.5 Total/NA Solid 6010D 612386 280-176200-14 DU06-SU03-230504-0.5 Total/NA Solid 6010D 612386 280-176200-15 DU01-230504-0.5 Total/NA Solid 6010D 612386 280-176200-16 DU01-230504-0.5-Rep1 Total/NA Solid 601OD 612386 280-176200-17 DU01-230504-0.5-Rep2 Total/NA Solid 601OD 612386 280-176200-18 DU02-230504-0.5 Total/NA Solid 601OD 612386 280-176200-20 DU06-SU04-230505-0.5 Total/NA Solid 601OD 612386 280-176200-21 DU03-230505-0.5 Total/NA Solid 6010D 612386 280-176200-22 DU03-230505-0.5-Rep1 Total/NA Solid 601OD 612386 280-176200-23 DU03-230505-0.5-Rep2 Total/NA Solid 6010D 612386 Eurofins Denver Page 130 of 160 6/1/2023 QC Association Summary Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon Metals (Continued) Analysis Batch: 613592 (Continued) Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch MB 280-612386/1-A Method Blank Total/NA Solid 601OD 612386 LCS 280-612386/2-A Lab Control Sample Total/NA Solid 601 OD 612386 280-176200-10 MS DU07-230502-Native Total/NA Solid 601OD 612386 280-176200-10 MSD DU07-230502-Native Total/NA Solid 601OD 612386 280-176200-13 MS DU04-SU01-230504-0.5 Total/NA Solid 601OD 612386 280-176200-13 MSD DU04-SU01-230504-0.5 Total/NA Solid 6010D 612386 280-176200-14 MS DU06-SU03-230504-0.5 Total/NA Solid 601OD 612386 280-176200-14 MSD DU06-SU03-230504-0.5 Total/NA Solid 6010D 612386 280-176200-15 MS DU01-230504-0.5 Total/NA Solid 6010D 612386 280-176200-15 MSD DU01-230504-0.5 Total/NA Solid 6010D 612386 Analysis Batch: 613659 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-176200-1 DU05-SU05-230505-Pond01 Dissolved Water 7470A 613510:'' 280-176200-2 DU05-SU05-230505-Pond02 Dissolved Water 7470A 613510 MB 280-613510/1-A Method Blank Total/NA Water 7470A 613510 LCS 280-613510/2-A Lab Control Sample Total/NA Water 7470A 613510 LCSD 280-613510/3-A Lab Control Sample Dup Total/NA Water 7470A 613510 280-176114-A-2-H MS Matrix Spike Total/NA Water 7470A 613510 280-176114-A-2-1 MSD Matrix Spike Duplicate Total/NA Water 7470A 613510 General Chemistry Analysis Batch: 611852 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-176200-3 DU05-SU06-230505-COMP01 Total/NA Solid D 2216 280-176200-4 DU05-SU06-230505-COMP02 Total/NA Solid D 2216 280-176200-4 DU DU05-SU06-230505-COMP02 Total/NA Solid D 2216 Analysis Batch: 611989 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-176200-10 DU07-230502-Native Total/NA Solid Increment, prep 280-176200-11 DU07-230502-Fill Total/NA Solid Increment, prep 280-176200-13 DU04-SU01-230504-0.5 Total/NA Solid Increment, prep 280-176200-14 DU06-SU03-230504-0.5 Total/NA Solid Increment, prep 280-176200-20 DU06-SU04-230505-0.5 Total/NA Solid Increment, prep 280-176200-20 MS DU06-SU04-230505-0.5 Total/NA Solid Increment, prep 280-176200-20 MSD DU06-SU04-230505-0.5 Total/NA Solid Increment, prep Analysis Batch: 611993 Lab Sample ID Client Sample ID 280-176200-15 DU01-230504-0.5 280-176200-16 DU01-230504-0.5-Rep1 280-176200-17 DU01-230504-0.5-Rep2 280-176200-18 DU02-230504-0.5 280-176200-21 DU03-230505-0.5 280-176200-22 DU03-230505-0.5-Rep1 280-176200-23 DU03-230505-0.5-Rep2 280-176200-21 MS DU03-230505-0.5 280-176200-21 MSD DU03-230505-0.5 Prep Type Matrix Method Prep Batch Total/NA Solid Increment, prep Total/NA Solid Increment, prep Total/NA Solid Increment, prep Total/NA Solid Increment, prep Total/NA Solid Increment, prep Total/NA Solid Increment, prep Total/NA Solid Increment, prep Total/NA Solid Increment, prep Total/NA Solid Increment, prep Eurofins Denver Page 131 of 160 6/1 /2023 QC Association Summary Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon General Chemistry Analysis Batch: 612817 FLab Sample ID Client Sample ID 280-176200-7 B03-17 280-176200-8 B02-8 280-176200-7 DU B03-17 Job ID: 280-176200-1 Prep Type Matrix Method Prep Batch Total/NA Solid D 2216 Total/NA Solid D 2216 Total/NA Solid D 2216 Eurofins Denver Page 132 of 160 6/1/2023 Lab Chronicle Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Client Sample ID. DU05-SU05-230505-Pond01 Date Collected: 05/05/23 10:00 Date Received: 05/09/23 09:15 Batch Batch Dil Prep Type Type Method Run Factor Total/NA Analysis 8260D 1 Total/NA Analysis NWTPH-Gx 1 Total/NA Prep 3510C Total/NA Analysis 8270D SIM 1 Total/NA Prep 3510C Total/NA Analysis NWTPH-Dx 1 Dissolved Prep 3005A Dissolved Analysis 6010D 1 Dissolved Prep 7470A Dissolved Analysis 7470A 1 Client Sample ID: DU05-SU05-230505-Pond02 Date Collected: 05/05/23 10:05 Date Received: 05/09/23 09:15 Batch Batch Dil Prep Type Type Method Run Factor Total/NA Analysis 8260D 1 Total/NA Analysis NWTPH-Gx 1 Total/NA Prep 3510C Total/NA Analysis 8270D SIM 1 Total/NA Prep 3510C Total/NA Analysis NWTPH-Dx 1 Dissolved Prep 3005A Dissolved Analysis 601OD 1 Dissolved Prep 7470A Dissolved Analysis 7470A 1 Client Sample ID: DU05-SU06-230505-COMP01 Date Collected: 05/05/23 10:20 Date Received: 05/09/23 09:15 Batch Batch oil Prep Type Type Method Run Factor Total/NA Analysis D 2216 1 --_ ........- Client Sample ID: DU05-SU06-230505-COMP01 Date Collected: 05/05/23 10:20 Date Received: 05/09/23 09:15 Job ID: 280-176200-1 Initial Amount Final Amount Lab Sample ID: 280-176200-1 Matrix: Water Batch Prepared Number or Analyzed Analyst Lab 5 mL 5 mL 612868 05/18/23 01:26 CCF EET DEN 5 mL 5 mL 425808 05/12/23 20:38 JBT EET SEA 248 mL 1 mL 612087 05/11/23 13:50 MAS EET DEN 200 uL 200 uL 612216 05/12/23 14:12 MAB EET DEN 238.5 mL 2 mL 425673 05/11/23 09:43 AA EET SEA 1 mL 1 mL 425687 05/11/23 21:49 KLW EET SEA 50 mL 50 mL 611911 05/11/23 07:42 US EET DEN 612415 05/13/23 01:28 ADL EET DEN 30 mL 50 mL 613510 05/23/23 17:26 PFM EET DEN 613659 05/23/23 23:23 PFM EET DEN Lab Sample ID: 280-176200-2 Matrix: Water Initial Final Batch Prepared Amount Amount Number or Analyzed Analyst Lab 5 mL 5 mL 612868 05/18/23 01:46 CCF EET DEN 5 mL 5 mL 425808 05/12/23 21:02 JBT EET SEA 234.4 mL 1 mL 612087 05/11/23 13:50 MAS EET DEN 200 uL 200 uL 612216 05/12/23 13:47 MAB EET DEN 243.5 mL 2 mL 425673 05/11/23 09:43 AA EET SEA 1 mL 1 mL 425687 05/11/23 22:08 KLW EET SEA 50 mL 50 mL 611911 05/11/23 07:42 US EET DEN 612415 05/13/23 01:32 ADL EET DEN 30 mL 50 mL 613510 05/23/23 17:26 PFM EET DEN 613659 05/23/23 23:30 PFM EET DEN Lab Sample ID. 280-176200-3 Matrix: Solid Initial Final Batch Prepared Amount Amount Number or Analyzed Analyst Lab 611852 05/09/23 17:06 LL EET DEN Lab Sample ID: 280-176200-3 Matrix: Solid Percent Solids: 82.7 Prep Type Batch Type Batch Method Dil Run Factor Initial Amount Final Amount Batch Number Prepared or Analyzed Analyst Lab Total/NA Prep 5035 7.7 g 10 mL 425990 05/15/23 13:26 ASJ EET SEA Total/NA Analysis NWTPH-Gx 1 1.075 mL 43 mL 426049 05/15/23 15:00 K1 K EET SEA Total/NA Prep 3546 5.2 g 1 mL 612097 05/11/23 12:12 EDW EET DEN Total/NA Analysis 8270D SIM 1 200 uL 200 uL 612600 05/16/23 13:02 MAB EET DEN Total/NA Prep 3546 5.0 g 10 mL 612472 05/15/23 14:22 GML EET DEN Total/NA Analysis 8082A 1 1 mL 1 mL 612755 05/17/23 18:47 SP EET DEN Eurofins Denver Page 133 of 160 6/1/2023 Lab Chronicle Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Client Sample ID: DU05-SU06-230505-COMP01 Date Collected: 05/05/23 10:20 Date Received: 05/09/23 09:15 Batch Batch Dil Prep Type Type Method Run Factor Total/NA Prep 3546 Total/NA Analysis NWTPH-Dx 1 Total/NA Prep 3050B Total/NA Analysis 6010D 1 Total/NA Prep 7471B Total/NA Analysis 7471 B 1 Client Sample ID: DU05-SU06-230505-COMP02 Date Collected: 05/05/23 10:25 Date Received: 05/09/23 09:15 Batch Batch Dil Prep Type Type Method Run Factor Total/NA Analysis D 2216 1 Client Sample ID: DU05-SU06-230505-COMP02 Date Collected: 05/05/23 10:25 Date Received: 05/09/23 09:15 Batch Batch Dil Prep Type Type Method Run Factor Total/NA Prep 5035 Total/NA Analysis NWTPH-Gx 1 Total/NA Prep 3546 Total/NA Analysis 8270D SIM 1 Total/NA Prep 3546 Total/NA Analysis 8082A 1 Total/NA Prep 3546 Total/NA Analysis NWTPH-Dx 1 Total/NA Prep 3050B Total/NA Analysis 6010D 1 Total/NA Prep 7471 B Total/NA Analysis 7471 B 1 - - ---- - .._.------- Client Sample ID: B03-19GW --- - - Date Collected: 05/03/23 14:00 Date Received: 05/09/23 09:15 Batch Batch Dil Prep Type Type Method Run Factor Total/NA Analysis 8260D 1 TotaVNA Analysis NWTPH-Gx 1 Total/NA Prep 3510C Total/NA Analysis 8270D SIM 1 Total/NA Prep 3510C Total/NA Analysis NWTPH-Dx 1 Dissolved Prep 3005A Dissolved Analysis 6010D 1 Job ID: 280-176200-1 Lab Sample ID: 280-176200-3 Matrix: Solid Percent Solids: 82.7 Initial Amount Final Amount Batch Number Prepared or Analyzed Analyst Lab 9.906 g 10 mL 425843 05/12/23 13:28 E1 W EET SEA 1 mL 1 mL 425959 05/15/23 17:57 KLW EET SEA 1.356 g 100 mL 612037 05/11/23 14:40 MSM EET DEN 612533 05/15/23 13:13 ADL EET DEN 0.58 g 50 mL 613328 05/22/23 15:20 PFM EET DEN 613486 05/22/23 21:51 PFM EET DEN Lab Sample ID: 280-176200-4 Matrix: Solid Initial Final Batch Prepared Amount Amount Number or Analyzed Analyst Lab 611852 05/09/23 17:06 LL EET DEN Lab Sample ID: 280-176200-4 Matrix: Solid Percent Solids: 83.5 Initial Final Batch Prepared Amount Amount Number or Analyzed Analyst Lab 6.273 g 10 mL 425990 05/15/23 13:26 ASJ EET SEA 1.075 mL 43 mL 426049 05/15/23 15:24 K1 K EET SEA 5.2 g 1 mL 612097 05/11/23 12:12 EDW EET DEN 200 uL 200 uL 612600 05/16/23 13:27 MAB EET DEN 5.0 g 10 mL 612472 05/15/23 14:22 GML EET DEN 1 mL 1 mL 612755 05/17/23 19:06 SP EET DEN 10.764 g 10 mL 425843 05/12/23 13:28 E1 W EET SEA 1 mL 1 mL 425959 05/15/23 18:37 KLW EET SEA 1.382 g 100 mL 612037 05/11/23 14:40 MSM EET DEN 612533 05/15/23 13:17 ADL EET DEN 0.54 g 50 mL 613328 05/22/23 15:20 PFM EET DEN 613486 05/22/23 21:53 PFM EET DEN -- - -- - ----- --- .----._..... ..-- Lab Sample ID. 280-176200-5 Matrix: Water Initial Final Batch Prepared Amount Amount Number or Analyzed Analyst Lab 5 mL 5 mL 612584 05/16/23 04:28 BMJ EET DEN 5 mL 5 mL 425808 05/12/23 21:26 JBT EET SEA 241.6 mL 1 mL 611929 05/10/23 10:33 CRK EET DEN 200 uL 200 uL 612138 05/11/23 22:47 MAB EET DEN 244.9 mL 2 mL 425673 05/11/23 09:43 AA EET SEA 1 mL 1 mL 425687 05/11/23 21:30 KLW EET SEA 50 mL 50 mL 611911 05/11/23 07:42 US EET DEN 612415 05/13/23 01:36 ADL EET DEN Eurofins Denver Page 134 of 160 6/1/2023 Lab Chronicle Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Client Sample ID: B02-15GW Date Collected: 05/03/23 15:00 Date Received: 05/09/23 09:15 Batch Batch Dil Initial Prep Type Type Method Run Factor Amount Total/NA Analysis 8260D 1 5 mL Total/NA Analysis NWTPH-Gx 1 5 mL Total/NA Prep 3510C 266.7 mL Total/NA Analysis 8270D SIM 1 200 uL Total/NA Prep 3510C 249.2 mL Total/NA Analysis NWTPH-Dx 1 1 mL Dissolved Prep 3005A 50 mL Dissolved Analysis 601OD Client Sample ID: B03-17 Date Collected: 05/03/23 13:15 Date Received: 05/09/23 09:15 Batch Batch Prep Type Type Method Run Total/NA Analysis D 2216 Client Sample ID: B03-17 Date Collected: 05/03/23 13:15 Date Received: 05/09/23 09:15 Batch Batch Prep Type Type Method Run Total/NA Prep 5035 Total/NA Analysis NWTPH-Gx Total/NA Prep 3546 Total/NA Analysis 8270D SIM Total/NA Prep 3546 Total/NA Analysis NWTPH-Dx Total/NA Prep 3050E Total/NA Analysis 601OD Client Sample ID: B02-8 Date Collected: 05/03/23 13:30 Date Received: 05/09/23 09:15 Batch Batch Prep Type Type Method Run Total/NA Analysis D 2216 Client Sample ID: B02-8 Date Collected: 05/03/23 13:30 Date Received: 05/09/23 09:15 Batch Batch Prep Type Type Method Run Total/NA Prep 5035 Total/NA Analysis NWTPH-Gx 11 Dil Initial Factor Amount 1 Job ID: 280-176200-1 Lab Sample ID: 280-176200-6 Matrix: Water Final Batch Prepared Amount Number or Analyzed Analyst Lab 5 mL 612565 05/16/23 01:11 ETB EET DEN 5 mL 425808 •05/12/23 21:50 JBT EET SEA 1 mL 611929 05/10/23 10:33 CRK EET DEN 200 uL 612138 05/11/23 23:12 MAB EET DEN 2 mL 425673 05/11/23 09:43 AA EET SEA 1 mL 425687 05/11/23 21:11 KLW EET SEA 50 mL 611911 05/11/23 07:42 US EET DEN 612415 05/13/23 01:41 ADL EET DEN Lab Sample ID: 280-176200-7 Matrix: Solid Final Batch Prepared Amount Number or Analyzed Analyst Lab 612817 05/17/23 12:13 ZPM EET DEN Lab Sample ID: 280-176200-7 Matrix: Solid Percent Solids: 86.0 Dil Initial Final Batch Prepared Factor Amount Amount Number or Analyzed Analyst Lab 8.392 g 10 mL 425990 05/15/23 13:26 ASJ EET SEA 1 1.075 mL 43 mL 426049 05/15/23 15:48 K1 K EET SEA 5.2 g 1 mL 612481 05/15/23 14:28 GML EET DEN 1 200 uL 200 uL 612597 05/16/23 11:49 MAB EET DEN 10.064 g 10 mL 425843 05/12/23 13:28 E1 W EET SEA 1 1 mL 1 mL 425959 05/15/23 18:57 KLW EET SEA 1.478 g 100 mL 612438 05/16/23 15:07 MSM EET DEN 1 613158 05/19/23 05:30 ADL EET DEN Lab Sample ID: 280-176200-8 Matrix: Solid Dil Initial Final Batch Prepared Factor Amount Amount Number or Analyzed Analyst Lab 1 612817 05/17/23 12:13 ZPM EET DEN Lab Sample ID: 280-176200-8 Matrix: Solid Percent Solids: 88.3 Dil Initial Final Batch Prepared Factor Amount Amount Number or Analyzed Analyst Lab 8.49 g 10 mL 425990 05/15/23 13:26 ASJ EET SEA 1 1.075 mL 43 mL 426049 05/15/23 16:12 K1 K EET SEA Eurofins Denver Page 135 of 160 6/1/2023 Lab Chronicle Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Client Sample ID: B02-8 Date Collected: 05/03/23 13:30 Date Received: 05/09/23 09:15 Batch Batch Prep Type Type Method Run Total/NA Prep 3546 Total/NA Analysis 8270D SIM Total/NA Prep 3546 Total/NA Analysis NWTPH-Dx Total/NA Prep 3050B Total/NA Analysis 6010D Client Sample ID: TB-230507-01 Date Collected: 05/07/23 11:00 Date Received: 05/09/23 09:15 Batch Batch Prep Type Type Method Run Total/NA Analysis 8260D Client Sample ID: DU07-230502-Native Date Collected: 05/02/23 18:30 Date Received: 05/09/23 09:15 Batch Batch Prep Type Type Method Run Total/NA ISM Prep Increment, prep Total/NA Prep 3546 Total/NA Analysis 8270D SIM Total/NA ISM Prep Increment, prep Total/NA Prep 3546 Total/NA Analysis 8082A Total/NA Prep 3546 Total/NA Analysis NWTPH-Dx Total/NA ISM Prep Increment, prep Total/NA Prep 3050B MOD Total/NA Analysis 6010D Total/NA ISM Prep Increment, prep Total/NA Prep 7471 B Total/NA Analysis 7471 B Total/NA Analysis Increment, prep Client Sample ID: DU07-230502-Fill Date Collected: 05/02/23 18:45 Date Received: 05/09/23 09:15 Batch Batch Prep Type Type Method Run Total/NA ISM Prep Increment, prep Total/NA Prep 3546 Total/NA Analysis 8270D SIM Total/NA ISM Prep Increment, prep Total/NA Prep 3546 Total/NA Analysis 8082A Job ID: 280-176200-1 Lab Sample ID. 280-176200-8 Matrix: Solid Percent Solids: 88.3 Dil Initial Final Batch Prepared Factor Amount Amount Number or Analyzed Analyst Lab 5.1 g 1 mL 612481 05/15/23 14:28 GML EET DEN 1 200 uL 200 uL 612597 05/16/23 12:11 MAB EET DEN 10.051 g 10 mL 425843 05/12/23 13:28 E1 W EET SEA 1 1 mL 1 mL 425959 05/15/23 19:16 KLW EET SEA 1.475 g 100 mL 612438 05/16/23 15:07 MSM EET DEN 1 613158 05/19/23 05:34 ADL EET DEN Lab Sample ID: 280-176200-9 Matrix: Water Dil Initial Final Batch Prepared Factor Amount Amount Number or Analyzed Analyst Lab 1 5 mL 5 mL 612891 05/18/23 01:00 BMJ EET DEN .. _ .. — Lab - Sample _. ID: --- ----- __. 280-176200-10 Matrix: Solid Dil Initial Final Batch Prepared Factor Amount Amount Number or Analyzed Analyst Lab 611987 05/10/23 14:21 EKB EET DEN 15.0 g 1 mL 612481 05/15/23 14:28 GML EET DEN 1 200 uL 200 uL 612597 05/16/23 12:33 MAB EET DEN 611987 05/10/23 14:21 EKB EET DEN 15.3 g 10 mL 612472 05/15/23 14:22 GML EET DEN 1 1 mL 1 mL 612755 05/17/23 19:24 SP EET DEN 10.14 g 10 mL 426406 05/18/23 14:28 E1 W EET SEA 1 1 mL 1 mL 427371 05/30/23 13:27 KLW EET SEA 611987 05/10/23 14:21 EKB EET DEN 1.365 g 100 mL 612386 05/22/23 07:43 US EET DEN 1 613592 05/22/23 21:40 ADL EET DEN 611987 05/10/23 14:21 EKB EET DEN 0.59 g 50 mL 613334 05/22/23 15:20 PFM EET DEN 1 613486 05/22/23 23:25 PFM EET DEN 1 611989 05/10/23 14:44 EKB EET DEN Lab Sample ID: 280-176200-11 Matrix: Solid Dil Initial Final Batch Prepared Factor Amount Amount Number or Analyzed Analyst Lab 611987 05/10/23 14:21 EKB EET DEN 15.1 g 1 mL 612481 05/15/23 14:28 GML EET DEN 1 200 uL 200 uL 612597 05/16/23 12:56 MAB EET DEN 611987 05/10/23 14:21 EKB EET DEN 16.3 g 10 mL 612472 05/15/23 14:22 GML EET DEN 1 1 mL 1 mL 612755 05/17/23 19:43 SP EET DEN Eurofins Denver Page 136 of 160 6/1 /2023 Lab Chronicle Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Client Sample ID: DU07-230502-Fill Date Collected: 05/02/23 18:45 Date Received: 05/09/23 09:15 Batch Batch Prep Type Type Method Run Total/NA Prep 3546 Total/NA Analysis NWTPH-Dx Total/NA ISM Prep Increment, prep Total/NA Prep 3050B MOD Total/NA Analysis 6010D Total/NA ISM Prep Increment, prep Total/NA Prep 7471 B Total/NA Analysis 7471 B Total/NA Analysis Increment, prep Client Sample ID: DU04-SU02-230504-0.5 Date Collected: 05/04/23 14:00 Date Received: 05/09/23 09:15 Batch Batch Prep Type Type Method Run Total/NA ISM Prep Increment, prep Total/NA Prep 3546 Total/NA Analysis 8082A Total/NA ISM Prep Increment, prep Total/NA Prep 7471 B Total/NA Analysis 7471 B Client Sample ID: DU04-SU01-230504-0.5 Date Collected: 05/04/23 14:45 Date Received: 05/09/23 09:15 Batch Batch Prep Type Type Method Run Total/NA ISM Prep Increment, prep Total/NA Prep 3546 Total/NA Analysis 8270D SIM Total/NA ISM Prep Increment, prep Total/NA Prep 3546 Total/NA Analysis 8082A Total/NA Prep 3546 Total/NA Analysis NWTPH-Dx Total/NA ISM Prep Increment, prep Total/NA Prep 3050B MOD Total/NA Analysis 6010D Total/NA Analysis Increment, prep Job ID: 280-176200-1 Lab Sample ID: 280-176200-11 Matrix: Solid Dil Factor Initial Amount Final Amount Batch Number Prepared or Analyzed Analyst Lab 10.44 g 10 mL 426406 05/18/23 14:28 E1 W EET SEA 1 1 mL 1 mL 427371 05/30/23 14:05 KLW EET SEA 611987 05/10/23 14:21 EKB EET DEN 1.341 g 100 mL 612386 05/22/23 07:43 US EET DEN 1 613592 05/22/23 22:00 ADL EET DEN 611987 05/10/23 14:21 EKB EET DEN 0.60 g 50 mL 613334 05/22/23 15:20 PFM EET DEN 1 613486 05/22/23 23:33 PFM EET DEN 1 611989 05/10/23 14:44 EKB EET DEN Lab Sample ID: 280-176200-12 Matrix: Solid Dil Initial Final Batch Prepared Factor Amount Amount Number or Analyzed Analyst Lab 611987 05/10/23 14:21 EKB EET DEN 15.4 g 10 mL 612472 05/15/23 14:22 GML EET DEN 1 1 mL 1 mL 612755 05/17/23 20:02 SP EET DEN 611987 05/10/23 14:21 EKB EET DEN 0.59 g 50 mL 613334 05/22/23 15:20 PFM EET DEN 1 613486 05/22/23 23:35 PFM EET DEN Lab Sample ID: 280-176200-13 Matrix: Solid Dil Factor Initial Amount Final Amount Batch Number Prepared or Analyzed Analyst Lab 611987 05/10/23 14:21 EKB EET DEN 15.2 g 1 mL 612481 05/15/23 14:28 GML EET DEN 1 200 uL 200 uL 612597 05/16/23 13:18 MAB EET DEN 611987 05/10/23 14:21 EKB EET DEN 15.2 g 10 mL 612472 05/15/23 14:22 GML EET DEN 1 1 mL 1 mL 612755 05/17/23 20:22 SP EET DEN 10.24 g 10 mL 426406 05/18/23 14:28 E1 W EET SEA 1 1 mL 1 mL 427371 05/30/23 14:24 KLW EET SEA 611987 05/10/23 14:21 EKB EET DEN 1.338 g 100 mL 612386 05/22/23 07:43 US EET DEN 1 613592 05/22/23 22:21 ADL EET DEN 1 611989 05/10/23 14:44 EKB EET DEN Eurofins Denver Page 137 of 160 6/1 /2023 Lab Chronicle Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Client Sample ID: DU06 SU03-230504-0.5 Date Collected: 05/04/23 15:30 Date Received: 05/09/23 09:15 Job ID: 280-176200-1 Lab Sample ID: 280-176200-14 Matrix: Solid Batch Batch Dil Initial Final Batch Prepared Prep Type Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab Total/NA ISM Prep Increment, prep 611987 05/10/23 14:21 EKB EET DEN Total/NA Prep 3546 15.0 g 1 mL 612481 05/15/23 14:28 GML EET DEN Total/NA Analysis 8270D SIM 1 200 uL 200 uL 612597 05/16/23 14:24 MAB EET DEN Total/NA ISM Prep Increment, prep 611987 05/10/23 14:21 EKB EET DEN Total/NA Prep 3546 15.5 g 10 mL 612472 05/15/23 14:22 GML EET DEN Total/NA Analysis 8082A 1 1 mL 1 mL 612755 05/17/23 21:18 SP EET DEN Total/NA Prep 3546 10.67 g 10 mL 426406 05/18/23 14:28 E1 W EET SEA Total/NA Analysis NWTPH-Dx 1 1 mL 1 mL 427371 05/30/23 14:43 KLW EET SEA Total/NA ISM Prep Increment, prep 611987 05/10/23 14:21 EKB EET DEN Total/NA Prep 3050B MOD 1.384 g 100 mL 612386 05/22/23 07:43 US EET DEN Total/NA Analysis 6010D 1 613592 05/22/23 22:33 ADL EET DEN Total/NA ISM Prep Increment, prep 611987 05/10/23 14:21 EKB EET DEN Total/NA Prep 7471 B 0.57 g 50 mL 613334 05/22/23 15:20 PFM EET DEN Total/NA Analysis 74718 1 613486 05/22/23 23:38 PFM EET DEN Total/NA Analysis Increment, prep 1 611989 05/10/23 14:44 EKB EET DEN Client Sample ID: DU01-230504-0.5 Lab Sample ID: 280-176200-15 Date Collected: 05/04/23 16:15 Matrix: Solid Date Received: 06/09/23 09:15 Batch Batch Dil Initial Final Batch Prepared Prep Type Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab Total/NA ISM Prep Increment, prep 611987 05/10/23 14:21 EKB EET DEN Total/NA Prep 3550C 30.1 g 1 mL 612492 05/15/23 15:08 GML EET DEN Total/NA Analysis 8270D 1 250 uL 250 uL 612910 05/18/23 16:41 RJC EET DEN Total/NA Prep 3546 10.25 g 10 mL 426406 05/18/23 14:28 E1 W EET SEA Total/NA Analysis NWTPH-Dx 1 1 mL 1 mL 427371 05/30/23 15:02 KLW EET SEA Total/NA ISM Prep Increment, prep 611987 05/10/23 14:21 EKB EET DEN Total/NA Prep 3050B MOD 1.248 g 100 mL 612386 05/22/23 07:43 US EET DEN Total/NA Analysis 6010D 1 613592 05/22/23 22:45 ADL EET DEN Total/NA ISM Prep Increment, prep 611987 05/10/23 14:21 EKB EET DEN Total/NA Prep 7471 B 0.60 g 50 mL 613334 05/22/23 15:20 PFM EET DEN Total/NA Analysis 7471 B 1 613486 05/22/23 23:51 PFM EET DEN Total/NA Analysis Increment, prep 1 611993 05/10/23 14:50 EKB EET DEN Client Sample ID: DU01-230504-0.5-Rep1 Lab Sample ID: 280-176200-16 Date Collected: 05/04/23 16:25 Matrix: Solid Date Received: 05/09/23 09:15 Batch Batch Dil Initial Final Batch Prepared Prep Type Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab Total/NA ISM Prep Increment, prep 611987 05/10/23 14:21 EKB EET DEN Total/NA Prep 3550C 31.2 g 1 mL 612492 05/15/23 15:08 GML EET DEN Total/NA Analysis 8270D 1 250 uL 250 uL 612910 05/18/23 17:46 RJC EET DEN Total/NA Prep 3546 10.20 g 10 mL 426406 05/18/23 14:28 E1 W EET SEA Total/NA Analysis NWTPH-Dx 1 1 mL 1 mL 427371 05/30/23 15:39 KLW EET SEA Eurofins Denver Page 138 of 160 6/1/2023 Lab Chronicle Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon Client Sample ID: DU01-230504-0.5 Rep1 Lab Sample ID: 280-176200-16 Date Collected: 05/04/23 16:25 Matrix: Solid Date Received: 05/09/23 09:15 Batch Batch Dil Initial Final Batch Prepared Prep Type Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab Total/NA ISM Prep Increment, prep 611987 05/10/23 14:21 EKB EET DEN Total/NA Prep 3050E MOD 1.414 g 100 mL 612386 05/22/23 07:43 US EET DEN Total/NA Analysis 6010D 1 613592 05/22/23 23:13 ADL EET DEN Total/NA ISM Prep Increment, prep 611987 05/10/23 14:21 EKB EET DEN Total/NA Prep 7471 B 0.59 g 50 mL 613334 05/22/23 15:20 PFM EET DEN Total/NA Analysis 7471 B 1 613486 05/22/23 23:58 PFM EET DEN Total/NA Analysis Increment, prep 1 611993 05/10/23 14:50 EKB EET DEN Client Sample ID: DU01-230504-0.5-Rep2 Lab Sample ID: 280-176200-17 Date Collected: 05/04/23 16:35 Matrix: Solid Date Received: 05/09/23 09:15 Batch Batch Dil Initial Final Batch Prepared Prep Type Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab Total/NA ISM Prep Increment, prep 611987 05/10/23 14:21 EKB EET DEN 1E Total/NA Prep 3550C 30.0 g 1 mL 612492 05/15/23 15:08 GML EET DEN Total/NA Analysis 8270D 1 250 uL 250 uL 612910 05/18/23 18:07 RJC EET DEN Total/NA Prep 3546 10.21 g 10 mL 426406 05/18/23 14:28 E1 W EET SEA Total/NA Analysis NWTPH-Dx 1 1 mL 1 mL 427371 05/30/23 15:58 KLW EET SEA Total/NA ISM Prep Increment, prep 611987 05/10/23 14:21 EKB EET DEN Total/NA Prep 3050E MOD 1.361 g 100 mL 612386 05/22/23 07:43 US EET DEN Total/NA Analysis 6010D 1 613592 05/22/23 23:18 ADL EET DEN Total/NA ISM Prep Increment, prep 611987 05/10/23 14:21 EKB EET DEN Total/NA Prep 7471 B 0.55 g 50 mL 613334 05/22/23 15:20 PFM EET DEN Total/NA Analysis 7471 B 1 613486 05/23/23 00:01 PFM EET DEN Total/NA Analysis Increment, prep 1 611993 05/10/23 14:50 EKB EET DEN Client Sample ID: DU02-230504-0.5 Lab Sample ID: 280-176200-18 Date Collected: 05/04/23 17:00 Matrix: Solid Date Received: 05/09/23 09:15 Batch Batch Dil Initial Final Batch Prepared Prep Type Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab Total/NA ISM Prep Increment, prep 611987 05/10/23 14:21 EKB EET DEN Total/NA Prep 3546 15.0 g 1 mL 612481 05/15/23 14:28 GML EET DEN Total/NA Analysis 8270D SIM 1 200 uL 200 uL 612597 05/16/23 14:46 MAB EET DEN Total/NA ISM Prep Increment, prep DL 611987 05/10/23 14:21 EKB EET DEN Total/NA Prep 3546 DL 15.0 g 1 mL 612481 05/15/23 14:28 GML EET DEN Total/NA Analysis 8270D SIM DL 2 200 uL 200 uL 613072 05/18/23 17:44 MAB EET DEN Total/NA Prep 3546 10.17 g 10 mL 426406 05/18/23 14:28 E1 W EET SEA Total/NA Analysis NWTPH-Dx 1 1 mL 1 mL 427371 05/30/23 16:17 KLW EET SEA Total/NA ISM Prep Increment, prep 611987 05/10/23 14:21 EKB EET DEN Total/NA Prep 3050E MOD 1.312 g 100 mL 612386 05/22/23 07:43 US EET DEN Total/NA Analysis 6010D 1 613592 05/22/23 23:22 ADL EET DEN Total/NA ISM Prep Increment, prep 611987 05/10/23 14:21 EKB EET DEN Total/NA Prep 7471 B 0.54 g 50 mL 613334 05/22/23 15:20 PFM EET DEN Total/NA Analysis 7471 B 1 613486 05/23/23 00:03 PFM EET DEN Total/NA Analysis Increment, prep 1 611993 05/10/23 14:50 EKB EET DEN Eurofins Denver Page 139 of 160 6/1/2023 Lab Chronicle Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Client Sample ID: TB-230507-02 Date Collected: 05/07/23 12:00 Date Received: 05/09/23 09:15 Batch Batch Prep Type Type Method Run Total/NA Analysis 8260D Client Sample ID: DU06-SU04-230505-0.5 Date Collected: 05/05/23 10:45 Date Received: 05/09/23 09:15 Batch Batch Prep Type Type Method Run Total/NA ISM Prep Increment, prep Total/NA Prep 3546 Total/NA Analysis 8270D SIM Total/NA ISM Prep Increment, prep Total/NA Prep 3546 Total/NA Analysis 8082A Total/NA Prep 3546 Total/NA Analysis NWTPH-Dx Total/NA ISM Prep Increment, prep Total/NA Prep 3050E MOD Total/NA Analysis 6010D Total/NA ISM Prep Increment, prep Total/NA Prep 7471 B Total/NA Analysis 7471 B Total/NA Analysis Increment, prep Client Sample ID: DU03-230505-0.5 Date Collected: 05/05/23 11:15 Date Received: 05/09/23 09:15 Batch Batch Prep Type Type Method Run Total/NA ISM Prep Increment, prep Total/NA Prep 3546 Total/NA Analysis 8270D SIM Total/NA Prep 3546 Total/NA Analysis NWTPH-Dx Total/NA ISM Prep Increment, prep Total/NA Prep 3050E MOD Total/NA Analysis 601OD Total/NA ISM Prep Increment, prep Total/NA Prep 7471 B Total/NA Analysis 7471 B Total/NA Analysis Increment, prep Dil Factor 1 Job ID: 280-176200-1 Lab Sample ID: 280-176200-19 Matrix: Water Initial Final Batch Prepared Amount Amount Number or Analyzed Analyst Lab 5 mL 5 mL 612891 05/18/23 01:22 BMJ EET DEN Lab Sample ID: 280-176200-20 Matrix: Solid Dil Factor Initial Amount Final Amount Batch Number Prepared or Analyzed Analyst Lab 611987 05/10/23 14:21 EKB EET DEN 15.4 g 1 mL 612481 05/15/23 14:28 GML EET DEN 1 200 uL 200 uL 612597 05/16/23 15:08 MAB EET DEN 611987 05/10/23 14:21 EKB EET DEN 15.6 g 10 mL 612472 05/15/23 14:22 GML EET DEN 1 1 mL 10.98 g 1 mL 10 mL 612755 426406 05/17/23 22:13 05/18/23 14:28 SP E1 W EET DEN EET SEA 1 1 mL 1 mL 427371 05/30/23 16:36 KLW EET SEA 611987 05/10/23 14:21 EKB EET DEN 1.495 g 100 mL 612386 05/22/23 07:43 US EET DEN 1 613592 05/22/23 23:26 ADL EET DEN 611987 05/10/23 14:21 EKB EET DEN 0.52 g 50 mL 613334 05/22/23 15:20 PFM EET DEN 1 613486 05/23/23 00:06 PFM EET DEN 1 611989 05/10/23 14:44 EKB EET DEN ---- -. _ _ Lab ....... _..--- Sample ID: - --- 280-176200-21 Matrix: Solid Dil Factor Initial Amount Final Amount Batch Number Prepared or Analyzed Analyst Lab 611987 05/10/23 14:21 EKB EET DEN 15.5 g 1 mL 612481 05/15/23 14:28 GML EET DEN 1 200 uL 200 uL 612597 05/16/23 15:30 MAB EET DEN 10.60 g 10 mL 426406 05/18/23 14:28 E1 W EET SEA 1 1 mL 1 mL 427371 05/30/23 21:03 KLW EET SEA 611987 05/10/23 14:21 EKB EET DEN 1.460 g 100 mL 612386 05/22/23 07:43 US EET DEN 1 613592 05/22/23 23:30 ADL EET DEN 611987 05/10/23 14:21 EKB EET DEN 0.59 g 50 mL 613334 05/22/23 15:20 PFM EET DEN 1 613486 05/23/23 00:08 PFM EET DEN 1 611993 05/10/23 14:50 EKB EET DEN Eurofins Denver Page 140 of 160 6/ 1 /2023 Lab Chronicle Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Client Sample ID DU03-230505-0.5-Rep1 Date Collected: 05/05/23 11:20 Date Received: 05/09/23 09:15 Job ID: 280-176200-1 Lab Sample ID: 280-176200-22 Matrix: Solid i Batch Batch Dil Initial Final Batch Prepared Prep Type Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab Total/NA ISM Prep Increment, prep 611987 05/10/23 14:21 EKB EET DEN Total/NA Prep 3546 15.2 g 1 mL 612481 05/15/23 14:28 GML EET DEN Total/NA Analysis 8270D SIM 1 200 uL 200 uL 612597 05/16/23 15:52 MAB EET DEN Total/NA Prep 3546 9.94 g 10 mL 426406 05/18/23 14:28 E1 W EET SEA Total/NA Analysis NWTPH-Dx 1 1 mL 1 mL 427371 05/30/23 21:41 KLW EET SEA Total/NA ISM Prep Increment, prep 611987 05/10/23 14:21 EKB EET DEN Total/NA Prep 3050B MOD 1.319 g 100 mL 612386 05/22/23 07:43 US EET DEN Total/NA Analysis 6010D 1 613592 05/22/23 23:34 ADL EET DEN Total/NA ISM Prep Increment, prep 611987 05/10/23 14:21 EKB EET DEN Total/NA Prep 7471 B 0.53 g 50 mL 613334 05/22/23 15:20 PFM EET DEN Total/NA Analysis 7471 B 1 613486 05/23/23 00:11 PFM EET DEN Total/NA Analysis Increment, prep 1 611993 05/10/23 14:50 EKB EET DEN - - --- --- - - --- -- ------- Client Sample ID: DU03-230505-0.5-Rep2 --- ----..-. -- - -- ---- Lab ---- - Sample ID: 280-176200-23 Date Collected: 05/05/23 11:25 Matrix: Solid Date Received: 05/09/23 09:15 Batch Batch Dil Initial Final Batch Prepared Prep Type Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab Total/NA ISM Prep Increment, prep 611987 05/10/23 14:21 EKB EET DEN Total/NA Prep 3546 15.0 g 1 mL 612481 05/15/23 14:28 GML EET DEN Total/NA Analysis 8270D SIM 1 200 uL 200 uL 612597 05/16/23 16:14 MAB EET DEN Total/NA Prep 3546 10.13 g 10 mL 426406 05/18/23 14:28 E1 W EET SEA Total/NA Analysis NWTPH-Dx 1 1 mL 1 mL 427371 05/30/23 22:00 KLW EET SEA Total/NA ISM Prep Increment, prep 611987 05/10/23 14:21 EKB EET DEN Total/NA Prep 3050E MOD 1.388 g 100 mL 612386 05/22/23 07:43 US EET DEN Total/NA Analysis 6010D 1 613592 05/22/23 23:38 ADL EET DEN Total/NA ISM Prep Increment, prep 611987 05/10/23 14:21 EKB EET DEN Total/NA Prep 7471 B 0.58 g 50 mL 613334 05/22/23 15:20 PFM EET DEN Total/NA Analysis 7471 B 1 613486 05/23/23 00:13 PFM EET DEN Total/NA Analysis Increment, prep 1 611993 05/10/23 14:50 EKB EET DEN Laboratory References: EET DEN = Eurofins Denver, 4955 Yarrow Street, Arvada, CO 80002, TEL (303)736-0100 EET SEA = Eurofins Seattle, 5755 8th Street East, Tacoma, WA 98424, TEL (253)922-2310 Eurofins Denver Page 141 of 160 6/1/2023 Accreditation/Certification Summary Client: SCS Engineers Job ID: 280-176200-1 Project/Site: Croman Mill Site, Ashland, Oregon Laboratory: Eurofins Denver Unless otherwise noted, all analytes for this laboratory were covered under each accreditation/certification below. Authority Oregon Program NELAP Identification Number Expiration Date 4025-011 01-10-24 The following analytes are included in this report, but the laboratory is not certified by the governing authority. This list may include analytes for which the agency does not offer certification. Analysis Method Prep Method Matrix Analyte 8082A 3546 Solid Polychlorinated biphenyls, Total D 2216 Solid Percent Solids Increment, prep Solid Incremented sample generated Laboratory: Eurofins Seattle The accreditations/certifications listed below are applicable to this report. Authority Program Identification Number Expiration Date Oregon NELAP 4167 07-07-23 Eurofins Denver Page 142 of 160 6/1/2023 Eurofins Denver Chain of Custody Record 4955 Yarrow Street Arvada, CO 80002-4517 phone 303.736.0100 fax 303.431.7171 Regulatory Program: �:] DW ❑ NPDES D RCRA C Other: %'. eurofins Eurofins Environment Testing America Project Manager: Barb Lary COC No: Client Contact .-marl BIarYLscsengmeeis­om Site Contact: Barb Lary Date: 1 of 3 COCs SCS Engineers Tel/Fax:971-284-1297 Lab Contact:M. Gardner Carrier: TALS Project #: Address 15940 SW 72nd Ave. Analysis Turnaround Time Z y a � z — x o _ x 8 = o Q w a in a w 0 E , Q w" °' a W a fa " m o � 10 Q. w a Sampler: City/State/ZipCity/State/Zip Portland, OR 97224 ❑ CALENDAR DAYS ❑ WORKING DAYS For Lab Use Only: Walk-in Client: Lab Sampling: 971 284-1297 Phone TAT if different from Below ❑ 2weeks ❑ 1 week ❑ 2days El day (xxx) xxx-xxxx FAX Project Name: Former Croman Mill Site: Ashland, OR Job / SDG No.. P O# 04222021.00 Task 02 amp e Sample Sample Type (c C..P, nor __ t p S m X v a ` u SampleWen'Nfieation Date Time G=G ab) Matrix coot LL 0. z z N a I o _ 2 >O Sample Specific Notes: DUOS-SU05-230505-Pond01 5/5/2023 1000 G W 11 X X X X X I X N DU05-SU05-230505-Pond02 5/5/2023 1005 1 G W 11 X X X X X I I X ' N p DU05-SU06-230505-COMP01 5/5/2023 1020 C S 7 X X X X X X v No _ rD DU05-SU06-230505-COMP02 5/5/2023 1025 C S 7 X X X X X X o n s m 9 m o p W B03-19G 5/3/2023 1400 G W 11 X X X X X X 0� B02-15GW 5/312023 1500 G W 11 X X X X X X O 803-17 5/3/2023 1315 G S 7 X X X X XCL B02-8 5/3/2023 1330 G S 8 X X X X1 X TB-230507-01 5/7/2023 1100 W 2 X Preservation Used: 1= Ice, 2= HCI; 3= H2SO4; 4-HNO3; 5=NaOH; 6= Other _ Possible Hazard Identification: Sample Disposal ( Afee may be assessed if samples are retained longer than 1 month) Are any samples from a listed EPA Hazardous Waste? Please List any EPA Waste Codes for the sample In the Comments Section if the lab Is to dispose of the sample. ❑ Return to Cli ' ❑ Archive for Months 0 Non -Hazard ❑ Skin Irritant ❑ Poison B ❑ Unknown Special Instructions/QC Requirements & Comments: On the DU05-SU06-230505-Comp01 and 02, sediment sample from pond. Do silica gel cleanup. Custody Seals Intact ❑ Yes ❑ No Custody Seal No.: lCooler Temp (°C): Obs'd: Corr'd Therm ID No.: O Relinquished by- Company. _ Oate:, Received by: Comgany Date/Time. N Relinquished by Company: tte/Time: Received Company Date/Time: O WRelinquished by: Company: DatefTime: Received in Laboratory by: Company: Date/Time: Eurofins Denver Chain of Custody Record 4955 Yarrow Street Arvada, CO 80002-4517 phone 303.736.0100 fax 303.431,7171 Regulatory Program: a Dw J NPDES J RCRA L7 Other: Project Manager: Barb Lary % eurofins Eurofins Environment Testing America COC No Client Contact kroml f3ia9yia sc ertgineers.ce m Site Contact: Barb Lary Date: _2 of-3— COCs SCS Engineers Tel/Fax:971-284-1297 Lab Contact:M. Gardner Carrier: TAILS Project #. Address 15940 SW 72nd Ave. Analysis Turnaround Time z u E w -2 r a Z > '" — 2 r aL o a F- z 0 i � � o a �, a' 0 � g rn o ¢ w 2 a :° aO a6' � N $ a CL W a m � 0 0 N ¢ w a c m c R o V � o u 0 d � 2 � Sampler: City/State/ZipCity/State/Zip Portland, OR 97224 ❑ CALENDAR DAYS ❑ WORKING DAYS For Lab Use Only: Walk-in Client: Lab Sampling: 971 284-1297 Phone TAT if different from Below 0 2weeks ❑ 1 week ❑ 2days ❑ 1 day (XXX) xxx-xxxx FAX Project Name: Former Croman Mill Site: Ashland, OR Job / SDG No.: P O # 04222021.00 Task 02 Sample Identification Sample Date Sample Time Sample Type (C=Comp, c=c -Grab) Matrix #of Cont Sample Specific Notes DU07-230502-Native 5/2/2023 1830 C S 1 Ix X Ix X I ix DU07-230502-Fill 5/2/2023 1845 C S 1 X X X X I X DU04-SU02-230504-0.5 5/4/2023 1400 C S 1 X X X DU04-SU01-230504-0.5 5/4/2023 1445 C S 1 X X X X X DU06-SU03-230504-0.5 5/4/2023 1530 C S 1 X X X IX I Ix DU01-230504-0.5 5/4/2023 1615 C S 1 X X X I X X DU01-230504-0.5-Re 1 5/4/2023 1625 C S 1 X X X X X DU01-230504-0.5-Re 2 5/4/2023 1635 C S 1 X X X X X _ DU02-230504-0.5 5/4/2023 1700 C S 1 X X IX X X Preservation Used: 1= Ice, 2= HCI; 3= H2SO4; 4=HNO3; 5=NaOH; 6= Other ossible Hazard Identification: e any samples from a listed EPA Hazardous Waste? Please List any EPA Waste Codes for the sample in the Comments Section if the lab is to dispose of the sample. Sample Disposal ( A fee may be assessed if samples are retained longer than 1 month) ❑ Retum to Client D Disposal by Lab Archive for Months C Non -Hazard L Skin Irritant ❑ Poison B ❑ Unknown Special Instructiori Requirements & Comments: en S 0.7' f, -' C o /?l Custody Seals Intact: ❑ Yes ❑ No Custody Seel No lCooler Temp. (°C): Obs'd: Corr'd: Therm ID No.: Relinquished by: L Company, o _ Da e/Time: •' Received b Coma EpWO Date/Time: 5.9 23 a915 Relinquished by. Company: Date/Time: Received b Company: Date/Time. Relinquished by. Company: Date/Time: Received in Laboratory by: Company: DatefTime: v O CD rr O O O N O N W Eurofins Denver Chain of Custody Record 4955 Yarrow Street Arvada, CO 80002-4517 phone 303.736.0100 fax 303.431,7171 Regulatory Program: ❑ DW ❑ NPDES ❑ RCRA ❑ Other: Project Manager: Barb Lary °- eurofins Eurofins Environment Testing America COC No: Client Contact Email 8i.,ryLscsengmcers.L0n Site Contact: Barb Lary Date: 3 of 3 COCs SCS Engineers Tel/Fax:971-284-1297 Lab Contact:M. Gardner Carrier: TAILS Project#: Address 15940 SW 72nd Ave. Analysis Turnaround Time ? } t0 a iL z Y y € a C o p x C z aC 0 ¢ x t z a W , a o m ❑n s W T a = a N E w X o a fL T� a m a o ono a w T LL 'x o u o a` 1 Ln I I I Sampler: City/State/Zip Portlartd CAR 97224 ❑ CALENDAR DAYS ❑ WORKING DAYS For Lab Use Only: Walk-in Client: Lab Sampling. 971 284-1297 Phone TAT if diRereni trom Below O 2 weeks ❑ 1 week 1-1N 2 days y ❑ 1 day ()(xx) xxx-xwo FAX Project Name Former Croman Mill Site. Ashland OR Job ! SDG No.. P O# 042M21,00 Task 02 Sample Identification Sample Date Sample Time Sample Type (C=Comp, G=Grab) Matrix #of cost. Sample Specific Notes. DU06-SU04-230505-0.5 5/5/2023 1045 C S 1 X I IX IX IX X DU03-230505-0.5 5/5/2023 1115 C S 1 X X X I X X DU03-230505-0.5-Repl 5/5/2023 1120 C S 1 X X X I X X DU03-230505-0.5-Rep2 5/5/2023 1125 C S 1 X X X I X X Preservation Used: 1= Ice, 2= HCI; 3= H2SO4; 4=HNO3; xNaOH; 6= Other -t--H41 I Possible Hazard Identification: Are any samples from a listed EPA Hazardous Waste? Please List any EPA Waste Codes for the sample in the Comments Section if the lab is to dispose of the sample. Sample Disposal ( A fee may be assessed if samples are retained longer than 1 month) ❑ Return to Client ❑ Archive for Months 2 Non -Hazard ❑ Skin Irritant ❑ Poison B ❑ Unknown Special Instructions/QC Requirements & Comments: TC 22,a 7� 1, C O,1 / Custody Seals Intact: ❑ Yes ❑ No Custody Seal No.: Cooler Temp. MY Obs'd: Corr'd: Therm ID No.' Relinquished - Company: Pate7fime: Received -, by: Co an F?I D �t/ Date�me: 5 - 923 Relinquished by: Company. Date/Time : Received Company: Date/Time: Relinquished by: Company Date/Time: Received in Laboratory by: Company: Date/Tme. M tV O tV W Eurofins Seattle 5755 8th Street East Tacoma, WA 98424 Chain of Custody Record eti eurofins ti 1 Environment Testing Phone:253-922-2310 Cartier Tracking No(s): C No: Sampler: Lab PM: 58080-119651.1 Gardner, Matthew Client Information Sub Contract Lab Stale of Origin: page: Client Contact: Phone: Mail: atthew.Gardner@e[.eurofinsus.com Oregon Matthew.Gardner@et.eurofi,nsus.com Page 1 of 1 Shipping/Receiving Job Accredilations Required (See note): #: Company NELAP -Oregon 280-176200-1 TestAmerica Laboratories, Inc. Preservation Codes: Address: Due Date Requested: Analysis Requested 4955 Yarrow Street, 5111/2023 A-HCL N- Nonene - Ciry� TAT Requested (days): O - Na204S C Zn Acetate C - Zn Acetate p _ Na204S Arvada D - Nitric Acid O - Na2So3 State. Zip: E-NaHSO4 R-Na2S203 CO, 80002 F - McOH S-H250a Phone: PO #. H - Ascorbic Acid T - TSP Dodecahydrate 303-736-0100(Tel) 303-431-7171(Fax) o -Acetone I - VIce - MCAA Email: WO #: Z � J-DI Water W - pH 4-5 Z f m K - EDTA Y -Tnzma Project #: a y L - EDA Z _other (specify) Project Name: Croman Mill Site, Ashland, Oregon 28023587 n > 0 Other Site. sSow#: m In Cn `o N N U Y m Sample �a N m Matrix E2 n Type s—M, if l "' Sample (C=comp, o a o d f°. Special InstructionstNote; Sample Identification - Client ID Lab ID) Sample Date Time G=grab) ar=ns...n=n. M a Preservation Code: 5/3/23 13:15 Solid X X X 1 B03-17 (280- 76200-7) Pacific 5/3/23 13:30 Solid X X X 1 B02-8 (280-176200-8) Pacific Environment Testing Northwest, ILL places the ownersof nt ded If nlvhonmennce t n our subcontract aboratones. This riinstr instructions berprovidetl rAny lchanges tto accreditation Note, Since laboratory accreditations are subject to change, Eurofins m the State of Origin listed above muship for analysisltests/matrix being analyzed, the samplespP t Shan shipped back to the Eurofins Eon Testing Northwest, LLC laboratory or other to said compliance to Eurofins Environment Testing Northwest, LLC. does not currently maintain accreditation Eurofins Envi,onment Testing Northwest, LLC attention immediately. If all requested accreditations are current to date, return the signed Chain of Custody attesting status should be brought to Sample Disposal (A fee may be assessed if samples are retained longer than 1 month) Possible Hazard Identification Return To Client = Disposal By Lab Archive For Months Unconfirmed Prima Deliverable Rank: 2 Special Instructions/OC Requirements: Deliverable Requested: I, II, tll, IV, Other (specify) Y Time: Method of Shipment Empty Kit Relinquished by: Date: Date/Tim - - Go an Company Received Date/Tim y' Relinquished by: ,3 1 me: pony Rece by: Date/Time. Company Relinquished by: DaterTime: Company Relinquished by: DaterTime: Company Received by: n. Cooler Temperature(s) °C and Other Remarks: Custody Seals Intact: Custody Seal No.: A Yes A No Vcr.06'092021 13 d' 0) ORIGI ID:BNOA (503) 639-9548 SHIP DATE: 02MAY23 HEATER WILLIAMS ACTWGT: 50.00 LB SCS 15940 §WI72ND AVENUE CAD: 1109739584NET4610 UMRTED STA�E9 US24 BILL SENDER TO SAMPLE RECEIVING EUROFINS LABS-COLORADO 4955 YARROW ST ARVADA CO 8000e Ste) 7364100 REF 04222021100 TASK 2 P0: DEPT III IIIIIIIIIIIIIIIIIIIIt�Flllllll llll lllllll 11 lllll 111 Fe 1p I I 1 I I 1 I E7�f555 , r 1 Fedx TUE 09 MAY 10:30k. 02e ozs3''7719 4�j48 7t7 PRIORlT O IERNICIa 8000� XA LAAA,c0_u8 DEW 04839963 05/00 5B3J3/23C3/FE2D- I (• I CD CD ORIGIN ID:BNOA (503) 639-9548 SHIP DATE: 02MAY23 HEATHER WILLIAMS ACTWGT: 50.00 LB I°v' SCS ENGINEERS CAD: 11097395BANET4610 0 15940 SW 72ND AVENUE --" - -- - PORTLAND OR 97224 BILL SENDER UNITED STATES US TO SAMPLE RECEIVING EUROFINS LABS-COL-ORADO - - -- a 4955 YARROW ST �3 ARVADA CO80002 ff) 736-0100 REP 04222021.00 TASK 2 h�7 ' � III IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII } I 1 ■ e� Express c 1 1 1 5 'C a m OdE I M o 63" 119 4548-7998 PRIORITY MAY 10:30A 0 Y OVERNIGH` 800XA LAAA P co —us ra ol� ................ ltAj4 � � 1 \ MIB39963 OS/OB 5B3J3/2rC3/FE2D - Q. N I � N-- r e Eurofins Denver 4955 Yarrow Street Arvada, CO 80002 Phone:303-736-0100 Fax.303-431-7171 Chain �of Custody Re�ord tiff eurofins ' Envirnn mrnl T—ting Sampler Lab PM. Carrier Tracking No(s) COC No Client Information Sub Contract Lab I Gardne , Matthew O 280-655299.1 Client Contact Phone E-Mail State of Origin Page. Shipping/Receiving I Matthe .Gardner@et.eurofinsus com Oregon Page 1 of 1 Company gredltations Required (See note). Job a Eurofins Environment TestingNorthern Ca I i N ;:L P - Oregon 280-176200-1 Address 880 Riverside Parkway, Due Dine Requested: I 5/30/2023 1 Analysis Requested Preservatlon Codes: M-Hexane I A - HCL N - None City TAT Requested (days): WetZ Sacramento B - Na0H O - AsNa02 C - Zn Acetate P D - Nitric Acid Na2043 state. P CA, 95605 E - NaHSO4 D - Na2S F - McOH R - Na2S203 Phone: PO >I 916-373-5600(Tel) 916-372-1059(Fax) o Z 3 9 c F S - H2SO4 G-Amchlor T - TSP Dodecahydrate H - Ascorbic ACM U- Acetone Emad- W O a I "I mm I -Ice J - DI Water V - MCAA W- pH 4- Project Name. - Project k Croman Mill Site, Ashland, Oregon 28023587 I O o C nzma L FDA -1 E � _ $ Z- other(spadty) Omer. Site ssowa A N � N ai O Matrix Sample Type (w. ..r. 4 Sample (C=comp, I...,,e. o• ..wa,, a x 9 Sample Identification -Client ID Lab ID Sam le Date Time G= rob eT•Tiuw.A•AU a to- Special Instructions/Note: Preservatlon Code: DU05-SU06-230505-COMPol (280-176200-3) 515/23 Solid X 1 Pacific DU05-SU06-230505-COMP02 (280-176200-4) 5/5/23 1025 Solid X Pacific 1 , l i I Note Since laboratory accredltations are subject to change, Eurofins TeslAmehca laces the ownership of method, gnalyte & accreditation compliance iponour subcontract laboratories. This sample shipment ,s forwarded under chain -of -custody It the laboratory does not Currently maintain accreditation in the Slate of Origin tisled above for analysis/tests/matrix bfing analyzed, the samples must be shipped back to the Eurofins TeiitArq'enica laboratory or other instructions will be provided. Any changes to accreditation status should be brought to Eurofins TestAmerica attention immediately If all requested accredltations are current to dale, return the signed Chain of Custody attesting to said compliance ty Eurofins TestAmerica. II Possible Hazard Identification Sample Disposal (A fee may be assessed if samples are retained longer than 1 month) Unconfirmed Relurn To Client Disposal By Lab Archive For Months. Deliverable Requested. I, II, III, IV, Other (specify) (Primary Deliverable Rank:I2 Special Instructions/QC Requirements. Empty Kit Relinquished by. I Date Tif11e:I Method of Shipment 1 Rell ed ` Dale im �� a Received by. DaT.., i Corr / JTt�IG/•V/ / { fta �7 Relmgwshed by Dal ,me- Company Re c ro aleTme- Company i Relingwshed by: Dalerrime: Company Received by ---- Daterrini Company Custod,YI.TS14 Intact. DYs A) No Custody Seal No. / r i Cooler Temperalure(s) °C and Other Remarks i � t �� I Ver: 06/08/2021 t Eurofins Denver 4955 Yarrow Street Arvada, CO 80002 Phone: 303-736-0100 Fax, 303-431-7171 I Chain Iof Custody Re ord Y ' 'ti tit eurofins Environment Testing Sample[ Lab PM: Carrier Tracking Nola): COC No, Client Information Sub Contract Lab Gardn , Matthew o 280-655298.1 Client Conrad: Phone : E-Mail l Slate of Onpin: papa: Shipping/Receiving Matthe .Gardner@et.eurofrnsus coin Oregon Page 1 of 1 Company: Ac edltabons Required (See note): Jobe, Eurofins Environment Testing Northwest, N LAP - Oregon 280-176200-1 Address: 5755 8th Street East, D" Date Req—lad: 5/3012023 i Analysis Requested Preservation Codes: q - NCL M - Hexane N Norte - fly. TAT Ragwsted (days): ) Tacoma 1 '^ Y ry o V' �3: B-N%OH C - Zn Acetate p . Na2045, D - Nitric Acid Stale, Zip: WA, 98424 $ sFh O IX E - NaMSO4 O - Na2SO3', R Na2S203 Phone PO a: ; 7 - - f • MaOH 253-922.2310(Tel) y a &[ �4 chlot H-An'—bK Asa T- TSP Dodecahydrate I Email: Oa. i k•^p, 7 >" - -Ice M V - MC J - DI Water - K -EDTA w.T��.S i ProjectName . Protect Y: ; Croman Mill Site, Ashland, Oregon 28023587 ! �F i a L-EDA Z -oMer (eperify) Other: Site. SSOWN: ! Z^. Sample Matrix t a i TYPe (w—. of Ol °t Ol Sample (C�Comp, Y.°r10. o_a S 2 z' 2 2 Sam le Identification -Client ID Lab ID Sample Date Time =. S cial inetructlons/Note: DU05-SU05-230505-Pond01 (280-176200-1) 5/5123 P000 acific Water X X DU05-SU05-230505-PondO2 (280-176200-2) 515/23 10:05 i Water X X Pacific DU05-SU06-230505-COMPOt 280-176200-3 ( ) 5/5/23 10.20 I Solid X X ± SGC REQUIRED ifi DU05-SUO&230505-COMP02 (280-176200-0) 5/5/23 1025 Solid X X SGC REQUIRED Pacific I 803-19GW (280 176200 5) 5/3123 14:00 Water X X' P ific 802-15GW (280-176200-6) 5/3/23 15:00 Water X X m B03-17 (280-176200-7) 5i3/23 13.15 'fic Solid X X: SGC REQUIRED P B02.8 (280-176200-8) 513/23 13.30 Pacific c Solid X X ' 3 SGC REQUIRED Note. Since laboratory accreditation% Am subject to change, Eurohts TestAmenca scas the ownership of melt cl. 4,nalyte & acaeditabon compaance pol our subcontract laboratories. This sample shipment is forwarded under Utah -of -custody- If the laboratory, does not currently maintain accreditation in she Slate of Origin listed above for analysisheeslmaVix b TestAmerlcs attention immediately. It all requested accreditation are current to date. inp analyzed, the samples must be shipped back to the Eurorme Tat return the signed Chain of Custody attesting to said compliance t erica laboratory or other mstrudtons will be provided. Any changes to accreditation status should be brought to Eurolms Erfins TestAmenca. I I Possible Hazard Identification I Sample Disposal (A fee may be assessed Ifsamples are retained longer than 1 month) Uncontimled Q = I Retum To Client Disposal By Lab Archive For Months' Deliverable Requested: I, II, III, IV, Other (specify) Primary Deliverable Rank:l2 Special Instructions/QC Requirements. Empty Kit Relin ished by: I Date: T r�te: Method of shipment. Relif Dater e. / Cpmaagll Racal tl Dele/Ti e: Company /�� Relinquished by DatUTime. I Company ! lRecarliad I I DaWT,me: Company R.Iinq—had by: D.I.Mme: � Company Received by: I DateRime: Company Custody Seals Intact Custody Seal No.: - cooler Temperatures) °ChQ#Ofhe, Remarks, - aYes ANo -- 9 Re Page 149 of 160 6/1/2023 Eurofins Denver 4955 Yarrow Street Arvada, CO 80002 Phone:303-736-0100 Fax!303-431-7171 Chain of Custody Record Rtis curof ins I a,I Environment Testing Sampler: Lab PM: Carrier Tracking No(s)-. COC No Client Information Sub Contract Lab Gardner, Matthew O 280-656228A Client Contact: Phone E-MaiC State of origin. Page Shipping/Receiving Matthew.Gardner@et.eurofinsus.com Oregon Page 1 of 2 Company. Accreditation. Required (See note): job * Eurofins Environment Testing Northwest, NELAP - Oregon 280-176200-1 Address Due Date Requested: Preservation Codes: 57558th Street East, 5/30/2023 Analysis Requested M- Hexane A - HCL N - None 8-NaOH city: TAT Requested (days): --_, Z Tacoma - 0-AsNaO2 C - Zn Acetate P - Na204S D - Nitric Acid State, Zip: WA, 98424 - K q - Na2S 03 E-NSHSO4 R-Na2SO3 203 P - McOH S - H2S01 Phone: PO N: 253-922-2370(Tel) p G - Amchlor H • Ascorbic Acid T - TSP Dodecahydrate 1 - Ice U - Acetone Email. Wo p: ' � � J - DI K - EDTA Water W - pH 4-5 V - MCAA Y - Tram Proiact Name: Project p: Croman Mill Site, Ashland, Oregon 28023587 _ L-EDA z - other (specify) other: Site SS0vv# - `I Sample Matrix Type Sample (C-comp, Sample Identification - Client 10 Lab 1D Sam la Date Time Gg rab at.-n..u..xw ru Special Instructions/Note: 2. 1 rcF DU07.230502-Native (280-176200.10) 5/2123 18'30 Solid X ISM Lab Prep, No Grinding Pacific DU07-230502-Fill (280-176200-11) 5/2/23 18- f Solid X ISM Lab Prep, No Grinding DU04-SU01-230504-0.5 (280-176200-13) 5/4123 14:45 Pacific Solid X ISM Lab Prep, No Grinding D1.106-SI103-23050445 (280-176200-14) 514123 15.30 Pacific Solid i X ISM Lab Prep, No Grinding DU01-230504-0.5 (280-176200-15) 514123 16A5 Solid I X ISM Lab Prep, No Grinding Pacific: DU01-230504-0.5-Rept (280-176200-16) 5/4/23 16:25 Solid X ISM Lab Prep, No Grinding Pacific DU01-230504-0.5-Rap2 (280-176200-17) 5/4/23 16:35 Solid X ISM Lab Prep, No Grinding DU02-230504-0.5 (280-176200-18) 5/4t23 17.00 Solid X I ISM Lab Prep, No Grinding DU06-SU04-230505-0.5 (280-176200-20) 515/23 10:45 Pacific Solid X ISM Lab Prep, No Grinding Note: Since laboratory accraditabons are subiect to change, Eurofins TastAme n places the ownership of method, analyze B accreditation compliance upon our subcontract Iaboratodes. This sample shipment is forwarded under chainof-cusloay, if the laboratory does not currently maintain accreditation in the State of Ongin fisted above for analysisAestslmatrix being analyzed, the samples must be shipped back to the Eurofins TestAmerica laboratory or other instructions wiil be provided- Any changes to &meditation status should be brought to Eurofins TeatAmerics attention Imrnediatety. If all requested amedilationa are current to date, return the signed Chain of Custody attesting to said compiianca to Eurofins TeatAmanca, Possible Hazard Identification Sample Disposal (A fee may be assessed If samples are retained longer than 1 month) Unconfirmed Q Ratum To Client O Disposal By Lab Archive For Months I Deliverable Requested. I, 11, Ill, IV, Other (specify] Primary Deliverable Rank 2 Special Instructions/OC Requirements: Empty Kit Relinquished by: Date: Time. Method of Shipment. Rat by: ` Datarr e: C Receives by: / � � Datr e: Company eiingw3hed by Dat&Mme: Company Received by. Datemme Company Retlnqui.hed by. Date/Tima. Company Received by: DatwrTme: Company Custody Seals Intact: CuslodysealNO.: CodvTsmpafawrr(a)egmid ofherRemerica: A Yes 4 No . ) /2023 clyC IOU Ul I UU Ver. W08/262 t Eurofins Denver 4955 Yarrow Street Arvada, CO 80002 Phone! 303-73"100 Fax: 303-431-7171 Chain of Custody Record tit eurofins Environment Testing Sampler: Lab PAA Can iar Tracking No(s): CDC No: Client Information Sub Contract Lab Gardner, Matthew O 280-856228.2 Client Contact Phone'. E-Mail: State of Origin: Page: Shipping/Receiving Matthew.Gardner@et.eurofinsus.com Oregon Page 2 of 2 Company: Accreditation Required (See note): Job #. Eurotins Environment Testing Northwest, NEk AP - Oregon 280-176200-1 Address: Due Date Requested: Preservation Codes: 5755 81h Street East, 5/30/2023 Analysis Requested I A HCL M- Hexane e - NaOH N - None City: TAT Requested (days): Tacoma C - Zn Acetate O - AsNe02 046 D - Nitric Add P - Na2S O - Na2O3 S2 State, Zip: WA,98424 E - NaHSO4 R-Na2S2O3 F - McOH S - H2SO4 G - Aco Ptorm' PO #: 253-922-231 o(T�) T - TSP Dodecabydists I-AsWrbic Acid Ascorbic U- Acetone •Ice V - MCAA Email: WO X: J - of Water W - pH 4-5 K - EDTA L EDA Y - Trizma Project Name: Project #. Croman Mill Site, Ashland, Oregon 28023587 , <t z- color(specify) Other: Site: SSOWM Sample Matrix Type (W—W. *"";a, =t Sample (C-comp, r Sam le identification - Client ID Lab 101 Sam le Date Time G= raD ar-Ti". a-Ak) Special InstructionslNote: DU03-230505-0.5-Repl (280-176200-22) 515/23 11:20 Pacific Solid X ISM Lab Prep, No Grinding DU03-230505-0.5-Rep2 (280-176200-23) 5/5123 11:25 Pacific Solid X ISM Lab Prep, No Grinding DU03-230505-0.5 (280-176200-21) 515/23 11A5 Pacific Solid X ISM Lab Prep, No Grinding THTH Note, Since laboratory accreditation ere subject to change, Eurofins TestAmarica places the ownership of method, analyte a accreditation compliance upon our subcontract laboratories. This sample shipment is forwarded under chain -of -custody. It the laboratory does not currently maintain accreditation in the State of Origin listed above for analyalsltestsimatrix being analyzed, the samples must be shipped back to the Eurofins TestAmerica laboratory or other instructions will be provided. Any charges to accreditation status should be brought to Eurofins Test"wrica aflention immediately. If as requested accreditation& are currant to data. return the signed Chain of Cuslody attesting to said compliance to Eurofins TestAmerica. Possible Hazard Identification Sample Disposal (A fee may be assessed ff samplas are retained longer than f month) El 171 I =1Retum Unconfirmed To Client Disposal By Lab Archive For Months Deliverable Requested: 1, II, Ili, IV, Other (specify) Primary Deliverable Rank: 2 Special Instructiontl Requirements: Empty Kit Relinquished by: Date: Time: Method of shipment: Reii by + Daterilpis C Race' Da Company S e(23Mo Relinquish y: DatoMme: Company Recery d by: DeteMme: Company Relinquished by: Daterriims: Company Received by: DateTme: Company Custody Seals Intact:. Custody Seal No.; - - Cooler Tarrrpersturo(s) G and Other Remarks: A Yes A No '2023 uy� rv. r— Ver: UbAJ8/2UZ1 Login Sample Receipt Checklist Client: SCS Engineers Job Number: 280-176200-1 Login Number: 176200 List Number: 1 Creator: Roehsner, Karen P Question Answer List Source: Eurofins Denver Comment Radioactivity wasn't checked or is </= background as measured by a survey True meter. The cooler's custody seal, if present, is intact. True Sample custody seals, if present, are intact. True The cooler or samples do not appear to have been compromised or True tampered with. Samples were received on ice. True Cooler Temperature is acceptable. True Cooler Temperature is recorded. True COC is present. True COC is filled out in ink and legible. True COC is filled out with all pertinent information. True Is the Field Sampler's name present on COC? True There are no discrepancies between the containers received and the COC. True Samples are received within Holding Time (excluding tests with immediate False Refer to Job Narrative for details. HTs) Sample containers have legible labels. True Containers are not broken or leaking. True Sample collection date/times are provided. True Appropriate sample containers are used. True Sample bottles are completely filled. True Sample Preservation Verified. N/A There is sufficient vol. for all requested analyses, incl. any requested True MS/MSDs Containers requiring zero headspace have no headspace or bubble is False Narrative to indicate if headspace container used <6mm (1/4"). for analysis. Multiphasic samples are not present. True Samples do not require splitting or compositing. True Residual Chlorine Checked. N/A [15 Eurofins Denver Page 152 of 160 6/1/2023 Login Sample Receipt Checklist Client: SCS Engineers Job Number: 280-176200-1 Login Number: 176200 List Number: 3 Creator: Prigge, Madison Question List Source: Eurofins Seattle List Creation: 05/10/23 01:68 PM Answer Comment Radioactivity wasn't checked or is </= background as measured by a survey N/A meter. The cooler's custody seal, if present, is intact. True Sample custody seals, if present, are intact. True The cooler or samples do not appear to have been compromised or True tampered with. Samples were received on ice. True Cooler Temperature is acceptable. True Cooler Temperature is recorded. True IR10 3.6/3.9 COC is present. True COC is filled out in ink and legible. True COC is filled out with all pertinent information. True Is the Field Sampler's name present on COC? N/A Received project as a subcontract. There are no discrepancies between the containers received and the COC. True Samples are received within Holding Time (excluding tests with immediate True HTs) Sample containers have legible labels. True Containers are not broken or leaking. True Sample collection date/times are provided. True Appropriate sample containers are used. True Sample bottles are completely filled. True Sample Preservation Verified. True There is sufficient vol. for all requested analyses, incl. any requested True MS/MSDs Containers requiring zero headspace have no headspace or bubble is True <6mm (1/4"). Multiphasic samples are not present. True Samples do not require splitting or compositing. True Residual Chlorine Checked. N/A Eurofins Denver Page 153 of 160 6/1/2023 Login Sample Receipt Checklist Client: SCS Engineers Login Number: 176200 List Number: 6 Creator: Presley, Kim A Question Radioactivity wasn't checked or is </= background as measured by a survey meter. The cooler's custody seal, if present, is intact. Sample custody seals, if present, are intact. The cooler or samples do not appear to have been compromised or tampered with. Samples were received on ice. Cooler Temperature is acceptable. Cooler Temperature is recorded. COC is present. COC is filled out in ink and legible. COC is filled out with all pertinent information. Is the Field Sampler's name present on COC? There are no discrepancies between the containers received and the COC. Samples are received within Holding Time (excluding tests with immediate HTs) Sample containers have legible labels. Containers are not broken or leaking. Sample collection date/times are provided. Appropriate sample containers are used. Sample bottles are completely filled. Sample Preservation Verified. There is sufficient vol. for all requested analyses, incl. any requested MS/MSDs Containers requiring zero headspace have no headspace or bubble is <6mm (1/4"). Multiphasic samples are not present. Samples do not require splitting or compositing. Residual Chlorine Checked. Answer N/A True True True True True True True True True N/A True True True True True True True True True True True True N/A Job Number: 280-176200-1 List Source: Eurofins Seattle List Creation: 05/18/23 09:55 AM Comment A3=1.7c Received project as a subcontract. Eurofins Denver Page 154 of 160 6/1/2023 i �eurofins .:: W oriment Testing. :-stAnnerica Sacramento Sample Receiving Notes Tracking # : l� /• J��,/` f ir� ��" SO O / O / SAT / 2-Day / Ground / UPS / CDO / Courier GS nTrac / Goldstreak / LISPS / Other Use this form to record Sample Custody Seal, Cooler Custody Seal, Temperature & corrected Temperature & other observations. File in the iob folder with the COC. Therm. ID/✓ 6' Corr. Factor: (+ / -) r °C Ice Wet e rvvl Other Cooler Custody Seal: Cooler ID: Temp Observed: �---d- —°C Corrected: % °C From: Temp Blank ❑ Sample Opening/Processing The Shipment Yes No NA Cooler compromised/tampered with? ❑ r� ❑ Cooler Temperature is acceptable? /❑ ❑ Frozen sam ,ies�show signs of thaw? ,❑ ❑ x Initials: Date: /& D Unpacking/Labeling The Samples Yes No NA COG is complete w/o discrepancies? /� ❑ ❑ Samples compromised/tampered with? ' ❑ '1� ❑ Containers are not broken or leaking? ❑ ❑ Sample custody seal? ❑ ❑ Sample containers have legible labels? 11 ❑ ❑ Sample date/times are provided? / ❑ ❑ Appropriate containers are used? — ❑ ❑ Sample bottles are completely filled? ❑ ❑ Sample preservatives verified? /❑ ❑ y� Is the Field Sampler's name on COG? ❑ ❑ Samples require splitting/compositing? ❑ ❑ �( Samples w/o discrepancies? "PI, ❑ / ❑ Zero headspace?" ❑ ❑ Alkalinity has no headspace? ❑ ❑ Perchlorate has headspace? ❑ ❑ (Methods 314, 331. 6850) Multiphasic samples are not present? ,PK ❑ ❑ 'Containers ng ero headspace have no headspace, or bubble < 6 mm (114 ) �r— Initials : Date Notes: Trizma Lot #(s): Login Completion Yes No NA Receipt Temperature on COC? p� ❑ ❑ Samples received within hold time?///4 ❑ ❑ NCM Filed? ' ❑ ❑ Log Release checked in TALS? ❑ Initials: r Dater IITACORPICORMOAIQA_FACILITIESISACRAMENTO-QAIDOCUMENT-MANAGEMENTIFFOORMSSIIQA-812 SAMPLE RECEIVING NOTES.DOC P� d5 of QA-812 MBB 0500/2022 6/1 %0, eurofins Environment Testing TestAmerica Job: I'- Sacramento Sample Receiving Notes Tracking # : 6 iY 2 S - 000V - I ( f ( SO �n/ FO / SAT / 2-Day / Ground / UPS / CDO / Courier GSO / OnTrac / Goldstreak / USPS / Other Use this form to record Sample Custody Seal, Cooler Custody Seal, Temperature & corrected Temperature & other observations. me in the ioto roioer wan the GUG Therm. ID: L -(;� Corr. Factor: ( + / - )°C Notes: Ice Wet Gel Other Cooler Custody Seal: Cooler ID: 2 0c- 2- Temp Observed: - k -� °C Corrected: 2 °C From: Temp Blank ❑ Sample 0- Open ing/Processing The Shipment Yes No NA Cooler compromised/tampered with? ❑ p-,_ ❑ Cooler Temperature is acceptable? p_ ❑ ❑ Frozen samples show signs of thaw? ❑ ❑ / Initials: Date: S �1 3 / Z3 Unpacking/Labeling The Samples Yes No NA COC is complete w/o discrepancies? t3- ❑ ❑ Samples compromised/tampered with? ❑ ❑ Containers are not broken or leaking? �, ❑ ❑ Sample custody seal? ❑ $- ❑ Sample containers have legible labels? 0-� ❑ ❑ Sample date/times are provided? �- ❑ ❑ Appropriate containers are used? (y ❑ ❑ Sample bottles are completely filled? p, ❑ ❑ Trizma Lot #(s): Sample preservatives verified? ❑ ❑ a Is the Field Sampler's name on COC? ❑ ❑ n Samples require splitting/compositing? ❑ ❑ 0-- Samples w/o discrepancies? tom- ❑ ❑ Zero headspace?' Alkalinity has no headspace? Perchlorate has headspace? (Methods 314, 331, 6850) ❑ ❑ ❑ ❑ ❑ ❑ 1;1.— @-- @� Login Completion Yes No NA Receipt Temperature on COC? Gk ❑ ❑ Samples received within hold time? g- ❑ ❑ NCM Filed? ❑ fn� ❑ Multiphasic samples are not present? 8-- ❑ ❑ Log Release checked in TALS? ❑ ❑ 0-- 'Containers requinng zero headspace have no headspace, or bubble < 6 mm (1/4') .� � (� 3 Initials: � Date: Initials: Date: ` L3 IITACORPICORPIQAIQA FACILITIESISACRAMENTO-QAIDOCUMENT-MANAGEMENTIFORMSIQA-812 SAMPLE RECEIVING NOTES.DOC QA-812 MBB 0511012022 Page 156 of 160 W � _ n 6/1/2023 v co m it 0 M 0 ., N 0 N W ISM_A DD_SI_SS Analysis Sheet (To Accompany Samples to Instruments) Batch Number: 280-611993 Analyst: Bunzli, Eric K Batch Open: 5/10/2023 2:50:OOPM Batch End: 5/12/2023 1:46:OOPM Batch Notes First Start time 05/10/2023 14:50 First End time 05/12/2023 13:47 Date and Time laid out to Dry 05/10/2023 17:09 Date and Time When Sieved 05/11/2023 19:51 Laid out on Parchment or Foil Parchment Mesh Size of Seive 10 Analyst ID - Sieving MLT Analyst ID - Label Check Reviewer: MLT Balance ID 38602403, 24750399 Digestion Tube/Cup ID NA SOP Number DV-OP-0013 Batch Comment 1 Og to Sacramento for 8290; tower: Nano Printed : 5/12/2023 Comments Page 2 of 3 Eurofins Denver T v cu Cn co 0 rn 0 DE N 0 N W Batch Number: 280-611993 ISM_A_DD_SI_SS Analysis Sheet (To Accompany Samples to Instruments) Analyst: Bunzli, Eric K Reagent Additions Worksheet Batch Open: 5/10/2023 2:50:OOPM Batch End: 5/12/2023 1:46:OOPM Lab ID Reagent Code Amount Added Final Amount By Witness Other Reagents: Reagent Amount/Units Lot#: Printed : 5/12/2023 Page 3 of 3 Eurofins Denver Envi,,- - - +eating,,, Test (oU 13:30 S -F 44 7~ 196 05.13 ORIGIN ID=W HH A 0) 716-0100 EUROFINS / SHIP DATE: 12MAY23 ACTWGT= 7.30 LB EUROFINS TESTAME CA DENVER 4955 YARROWS CAD: 290B84/CAFE3621 ARVADA, CO 800?� UNITED STATES �1I BILL SENDER r TD SHIPPING/RECEIVING i r EUROFINS ENVIRONMENT TESTING NORTHE 880 RIVERSIDE PARKWAY WEST SACRAMENTO CA 95605 i %16) 373-6600 REF: $280-130327 p0: YES DEPT: BOTTLE PFVP ' XO BLUA C,.U,��� 16 Page 159 of 160 6/1/2023 ti=m eurofins i I Environment Testing + TestAmerica IVIiI�If�I�IIIIIIIIIIIh�IVillllilWVVI 280-176200 Field Sheet Job Sacramento Sample Receiving Notes & wa, a a, 10 SO PO FO / SAT / 2-Day / Ground / UPS / CDO / Courier GS nTrac / Goldstreak / USPS / Other Use this form to record Sample Custody Seal, Cooler Custody Seal, Temperature & corrected Temperature & other observations. rue in the ioo roiaer wan the cuc. Therm. ID: Corr. Factor: ( + / -) r °C Ice / Wet Gel Other Cooler Custody Seal: Cooler ID: Temp Observed: °C Corrected: °C From: Temp Blank ❑ Sample ❑ Opening/Processing The Shipment Yes No NA Cooler compromised/tampered with? ❑ 7 ❑ Cooler Temperature is acceptable? I ❑ 0 Frozen s show signs f thaw?//,n� ❑ Initials: Date. 6123 - Unpacking/Labeling The Samples Yes No NA COC is complete w/o discrepancies? � ❑ ❑ Samples compromised/tampered with? ❑ � ❑ Containers are not broken or leaking? p� ❑ ❑ Sample custody seal? /❑ D Sample containers have legible labels? ❑ ❑ Sample date/times are provided? D ❑ Appropriate containers are used? ❑ ❑ Sample bottles are completely filled? ❑ ❑ Sample preservatives verified? ❑ ❑ Is the Field Sampler's name on COC? ❑ ❑ Samples require splitting/compositing? ❑ ❑ Samples w/o discrepancies? q/ ❑ ❑ Zero headspace?' /❑ ❑ f� Alkalinity has no headspace? ❑ ❑ /� Perchlorate has headspace? ❑ ❑ (Methods 314, 331, 6850) Multiphasic samples are not present? ❑ ❑ 'Containers req g headspace have no headspace, or bubble < 6 mm (1/4 ) �a / b, -d 5 Initials: Date: Notes: Trizma Lot #(s): Login Completion Yes No NA Receipt Temperature on COC? � ❑ ❑ Samples received within hold time? D ❑ NCM Filed? ❑ ❑ Log Relea hecked in TAILS? ❑ ❑ 75 Initials: Dat V IITACORPICORPIQAIQA_FACIL/TIESISACRAMENTO-QAIDOCUMENT-MANAGEMENTIFORMSVQA-812 SAMPLE RECEIVING NOTES.DOC e160 QA-812 MBB 0511012022 6/1 /2023 tiff eurofins Environment Testing I ANALYTICAL REPORT PREPARED FOR Attn: Ms. Barbara Lary SCS Engineers 15940 SW 72nd Avenue Portland, Oregon 97224 Generated 6/7/2023 3:16:30 PM JOB DESCRIPTION Croman Mill Site, Ashland, Oregon NUMBER 280-176200-2 711 n This report may not be reproduced except in full, and with written approval from the laboratory. The results relate only to the samples tested. For questions please contact the Project Manager at the e-mail address or telephone number listed on this page. The test results in this report relate only to the samples as received by the laboratory and will meet all requirements of the methodology, with any exceptions noted. This report shall not be reproduced except in full, without the express written approval of the laboratory. All questions should be directed to the Eurofins TestAmerica Project Manager. Generated 6/7/2023 3:16:30 PM Authorized for release by Matthew Gardner, Project Manager I Matthew. Gard ner(o)et. eurofi nsus. corn (303)736-0100 Eurofins Denver is a laboratory within TestAmerica Laboratories, Inc., a company within Eurofins Environment Testing Group of Companies Page 2 of 51 6/7/2023 Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Table of Contents Laboratory Job ID: 280-176200-2 CoverPage .............................................. 1 Table of Contents ......................................... 3 Definitions ............................................... 4 Case Narrative ........................................... 5 Detection Summary ........................................ 6 Method Summary ......................................... 11 Sample Summary ......................................... 12 Client Sample Results ...................................... 13 QC Sample Results ........................................ 24 QC Association ........................................... 34 Chronicle ................................................ 36 Certification Summary ...................................... 38 Chain of Custody .......................................... 39 Receipt Checklists ......................................... 42 Isotope Dilution Summary ................................... 45 Field Data Sheets ......................................... 47 z Eurofins Denver Page 3 of 51 6/7/2023 Definitions/Glossary Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Qualifiers Dioxin Job ID: 280-176200-2 Qualifier Qualifier Description `5- Isotope dilution analyte is outside acceptance limits, low biased. 4 MS, MSD: The analyte present in the original sample is greater than 4 times the matrix spike concentration; therefore, control limits are not B E F1 F5 G J q Glossary Abbreviation 0 %R CFL CFU CNF DER Dil Fac DL DL, RA, RE, IN DLC EDL LOD LOQ MCL MDA MDC MDL ML MPN MQL NC ND NEG POS PQL PRIES QC RER RL RPD TEF TEQ TNTC applicable. Compound was found in the blank and sample. Result exceeded calibration range. MS and/or MSD recovery exceeds control limits. Duplicate RPD exceeds limit, and one or both sample results are less than 5 times RL, and the absolute difference between results is < the upper reporting limits for both. The reported quantitation limit has been raised due to an exhibited elevated noise or matrix interference Result is less than the RL but greater than or equal to the MDL and the concentration is an approximate value. The reported result is the estimated maximum possible concentration of this analyte, quantitated using the theoretical ion ratio. The measured ion ratio does not meet qualitative identification criteria and indicates a possible interference. These commonly used abbreviations may or may not be present in this report. Listed under the "D" column to designate that the result is reported on a dry weight basis Percent Recovery Contains Free Liquid Colony Forming Unit Contains No Free Liquid Duplicate Error Ratio (normalized absolute difference) Dilution Factor Detection Limit (DoD/DOE) Indicates a Dilution, Re -analysis, Re -extraction, or additional Initial metals/anion analysis of the sample Decision Level Concentration (Radiochemistry) Estimated Detection Limit (Dioxin) Limit of Detection (DoD/DOE) Limit of Quantitation (DoD/DOE) EPA recommended "Maximum Contaminant Lever' Minimum Detectable Activity (Radiochemistry) Minimum Detectable Concentration (Radiochemistry) Method Detection Limit Minimum Level (Dioxin) Most Probable Number Method Quantitation Limit Not Calculated Not Detected at the reporting limit (or MDL or EDL if shown) Negative / Absent Positive / Present Practical Quantitation Limit Presumptive Quality Control Relative Error Ratio (Radiochemistry) Reporting Limit or Requested Limit (Radiochemistry) Relative Percent Difference, a measure of the relative difference between two points Toxicity Equivalent Factor (Dioxin) Toxicity Equivalent Quotient (Dioxin) Too Numerous To Count Eurofins Denver Page 4 of 51 6/7/2023 Case Narrative Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Job ID: 280-176200-2 Laboratory: Eurofins Denver Narrative Job Narrative 280-176200-2 Comments No additional comments. Job ID: 280-176200-2 Receipt The samples were received on 5/9/2023 9:15 AM. Unless otherwise noted below, the samples arrived in good condition, and where required, properly preserved and on ice. The temperatures of the 2 coolers at receipt time were 0.80 C and 1.40 C. Dioxin The Isotope Dilution Analyte (IDA) recovery associated with the following sample is below the method recommended limit: (280-175901-B-1-B MS). Generally, data quality is not considered affected if the IDA signal-to-noise ratio is greater than 10:1, which is achieved for all IDA in the sample. The following samples exhibited elevated noise or matrix interferences for one or more analytes causing elevation of the detection limit (EDL): DU01-230504-0.5 (280-176200-15), DU01-230504-0.5-Rep1 (280-176200-16), DU01-230504-0.5-Rep2 (280-176200-17), DU02-230504-0.5 (280-176200-18), DU03-230505-0.5 (280-176200-21), DU03-230505-0.5-Rep1 (280-176200-22), (280-176200-F-21-B MS) and (280-176200-F-21-C MSD) . The reporting limit (RL) for the affected analytes has been raised to be equal to the EDL, and a "G" qualifier applied. The concentration of OCDD associated with the following sample exceeded the instrument calibration range: DU01-230504-0.5-Rep1 (280-176200-16). This analyte has been qualified; however, the peak did not saturate the instrument detector. Historical data indicate that for the isotope dilution method, dilution and re -analysis will not produce significantly different results from those reported above the calibration range. Ion abundance ratios are outside criteria for the Isotope Dilution Analyte (IDA) associated with the following sample: DU02-230504-0.5 (280-176200-18). The theoretical area for the IDA was used to quantitate recovery and target concentration. The matrix spike / matrix spike duplicate (MS/MSD) recoveries for preparation batch 320-675691 and analytical batch 320-680038 were outside control limits for one or more analytes. See QC Sample Results for detail. Sample matrix interference and/or non -homogeneity are suspected because the associated laboratory control sample (LCS) recovery is within acceptance limits. Ion abundance ratios are outside criteria for the Isotope Dilution Analyte (IDA) associated with the following sample: DU03-230505-0.5-Rep2 (280-176200-23). The theoretical area for the IDA was used to quantitate recovery and target concentration. No additional analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page. Geotechnical Methods Increment, prep: In analytical batch 280-611993, the following samples were air dried and sieved per the procedure; however, the samples contained material that would not pass through the sieve: DU01-230504-0.5 (280-176200-15), DU01-230504-0.5-Rep1 (280-176200-16), DU01-230504-0.5-Rep2 (280-176200-17), DU02-230504-0.5 (280-176200-18), DU03-230505-0.5 (280-176200-21), DU03-230505-0.5-Rep1 (280-176200-22), DU03-230505-0.5-Rep2 (280-176200-23), (280-176200-A-21 MS) and (280-176200-A-21 MSD). This material was removed, was not extracted, and is described in the aliquot spreadsheet. For methods ISM_A_DD_SI_SS/8290. Methods Increment, prep: In analytical batch 280-611993 samples DU01-230504-0.5 (280-176200-15), DU01-230504-0.5-Rep1 (280-176200-16), DU01-230504-0.5-Rep2 (280-176200-17), DU02-230504-0.5 (280-176200-18), DU03-230505-0.5 (280-176200-21), DU03-230505-0.5-Rep1 (280-176200-22), DU03-230505-0.5-Rep2 (280-176200-23), (280-176200-A-21 MS) and (280-176200-A-21 MSD) for methods ISM_A_DD_SI_SS/8290. No additional analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page. Dioxin Prep No analytical or quality issues were noted, other than those described in the Definitions/Glossary page. Eurofins Denver Page 5 of 51 6/7/2023 Detection Summary Client: SCS Engineers Job ID: 280-176200-2 Project/Site: Croman Mill Site, Ashland, Oregon Client Sample ID: DU05-SU06-230505-COMP01 Lab Sample ID: 280-176200-3 Analyte Result Qualifier RL EDL Unit Dil Fac D Method Prep Type 1,2,3,7,8-PeCDD 1.2 J q 5.5 0.21 pg/g 1 c� 8290A Total/NA 2,3,4,7,8-PeCDF 4.8 J 5.5 1.9 pg/g 1 * 8290A Total/NA 1,2,3,4,7,8-HxCDD 1.3 J B 5.5 0.19 pg/g 1 a 8290A Total/NA 1,2,3,6,7,8-HxCDD 4.5 J B 5.5 0.20 pg/g 1 * 8290A Total/NA 1,2,3,7,8,9-HxCDD 3.1 J B 5.5 0.17 pg/g 1 o 8290A Total/NA 1,2,3,4,7,8-HxCDF 5.2 J 5.5 0.87 pg/g 1 * 8290A Total/NA 1,2,3,6,7,8-HxCDF 8.6 5.5 0.77 pg/g 1 * 8290A Total/NA 2,3,4,6,7,8-HxCDF 6.7 B 5.5 0.69 pg/g 1 * 8290A Total/NA 1,2,3,4,6,7,8-HpCDD 42 B 5.5 0.25 pg/g 1 * 8290A Total/NA 1,2,3,4,6,7,8-HpCDF 17 B 5.5 0.38 pg/g 1 o 8290A Total/NA 1,2,3,4,7,8,9-HpCDF 1.9 J B 5.5 0.40 pg/g 1 * 8290A Total/NA OCDD 220 B 11 0.36 pg/g 1 * 8290A Total/NA OCDF 16 B 11 0.11 pg/g 1 * 8290A Total/NA Total TCDF 49 q G 1.3 1.3 pg/g 1 * 8290A Total/NA Total PeCDD 4.7 J q 5.5 0.21 pg/g 1 * 8290A Total/NA Total PeCDF 89 5.5 1.8 pg/g 1 * 8290A Total/NA Total HxCDD 38 B q 5.5 0.19 pg/g 1 * 8290A Total/NA Total HxCDF 140 B q 5.5 0.79 pg/g 1 * 8290A Total/NA Total HpCDD 84 B 5.5 0.25 pg/g 1 * 8290A Total/NA Total HpCDF 43 B 5.5 0.39 pg/g 1 * 8290A Total/NA Client Sample ID: DU05-SU06-230505-COMP02 Lab Sample ID: 280-176200-4 Analyte Result Qualifier RL EDL Unit Dil Fac D Method Prep Type 1,2,3,7,8-PeCDD 1.5 J 5.8 0.19 pg/g 1 * 8290A Total/NA 2,3,4,7,8-PeCDF 3.5 J q 5.8 1.7 pg/g 1 * 8290A Total/NA 1,2,3,4,7,8-HxCDD 1.1 J B q 5.8 0.25 pg/g 1 0 8290A Total/NA 1,2,3,6,7,8-HxCDD 5.1 J B 5.8 0.25 pg/g 1 * 8290A Total/NA 1,2,3,7,8,9-HxCDD 3.3 J B 5.8 0.22 pg/g 1 * 8290A Total/NA 1,2,3,4,7,8-HxCDF 5.2 J 5.8 0.76 pg/g 1 * 8290A Total/NA 1,2,3,6,7,8-HxCDF 7.9 5.8 0.67 pg/g 1 0 8290A Total/NA 2,3,4,6,7,8-HxCDF 7.1 B 5.8 0.60 pg/g 1 * 8290A Total/NA 1,2,3,4,6,7,8-HpCDD 46 B 5.8 0.27 pg/g 1 * 8290A Total/NA 1,2,3,4,6,7,8-HpCDF 18 B 5.8 0.34 pg/g 1 0 8290A Total/NA 1,2,3,4,7,8,9-HpCDF 1.6 J B 5.8 0.34 pg/g 1 * 8290A Total/NA OCDD 260 B 12 0.49 pg/g 1 o 8290A Total/NA OCDF 17 B 12 0.13 pg/g 1 * 8290A Total/NA Total TCDF 47 q 1.2 0.55 pg/g 1 * 8290A Total/NA Total PeCDD 10 q 5.8 0.19 pg/g 1 o 8290A Total/NA Total PeCDF 83 q 5.8 1.6 pg/g 1 * 8290A Total/NA Total HxCDD 41 B q 5.8 0.24 pg/g 1 a 8290A Total/NA Total HxCDF 150 B 5.8 0.68 pg/g 1 * 8290A Total/NA Total HpCDD 91 B 5.8 0.27 pg/g 1 * 8290A Total/NA Total HpCDF 47 B 5.8 0.34 pg/g 1 � 8290A Total/NA Client Sample ID: DU01-230504-0.5 Lab Sample ID: 280-176200-15 Analyte Result Qualifier RL EDL Unit DIl Fac D Method Prep Type 2,3,7,8-TCDD 0.94 J q 0.99 0.071 pg/g 1 8290A Total/NA Total TCDD 4.7 q 0.99 0.071 pg/g 1 8290A Total/NA 1,2,3,7,8-PeCDD 4.2 J 4.9 0.20 pg/g 1 8290A Total/NA Total PeCDD 14 q 4.9 0.20 pg/g 1 8290A Total/NA This Detection Summary does not include radiochemical test results. Eurofins Denver Page 6 of 51 6/7/2023 Detection Summary Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Client Sample ID: DU01-230504-0.5 (Continued) Analyte Result Qualifier RL EDL Unit Job ID: 280-176200-2 Lab Sample ID: 280-176200-15 Dil Fac D Method Prep Type 1,2,3,4,7,8-HxCDD 6.9 B 4.9 1.4 pg/g 1 8290A Total/NA 1,2,3,6,7,8-HxCDD 66 4.9 1.3 pg/g 1 8290A Total/NA 1,2,3,7,8,9-HxCDD 16 4.9 1.3 pg/g 1 8290A Total/NA Total HxCDD 280 B 4.9 1.3 pg/g 1 8290A Total/NA 1,2,3,4,6,7,8-HpCDD 400 B G 6.9 6.9 pg/g 1 8290A Total/NA Total HpCDD 740 B G 6.9 6.9 pg/g 1 8290A Total/NA OCDD 3100 B 9.9 4.6 pg/g 1 8290A Total/NA Total TCDF 8.0 q 0.99 0.070 pg/g 1 8290A Total/NA 1,2,3,7,8-PeCDF 1.6 J B 4.9 0.19 pg/g 1 8290A Total/NA 2,3,4,7,8-PeCDF 3.0 J B 4.9 0.22 pg/g 1 8290A Total/NA Total PeCDF 29 B q 4.9 0.20 pg/g 1 8290A Total/NA 1,2,3,4,7,8-HxCDF 4.3 J B 4.9 0.72 pg/g 1 8290A Total/NA 1,2,3,6,7,8-HxCDF 4.0 J B 4.9 0.66 pg/g 1 8290A Total/NA 2,3,4,6,7,8-HxCDF 5.0 B 4.9 0.59 pg/g 1 8290A Total/NA Total HxCDF 210 B 4.9 0.65 pg/g 1 8290A Total/NA 1,2,3,4,6,7,8-HpCDF 180 B 4.9 1.9 pg/g 1 8290A Total/NA 1,2,3,4,7,8,9-HpCDF 3.9 J B 4.9 1.9 pg/g 1 8290A Total/NA Total HpCDF 470 B 4.9 1.9 pg/g 1 8290A Total/NA OCDF 150 B 9.9 0.18 pg/g 1 8290A Total/NA 2,3,7,8-TCDF - RA 2.7 0.99 0.099 pg/g 1 8290A Total/NA Incremented sample generated True NONE 1 Increment, prep Total/NA Client Sample ID: DU01-230504-0.5-Rep1 Lab Sample ID: 280-176200-16 Analyte Result Qualifier RL EDL Unit Dil Fac D Method Prep Type 2,3,7,8-TCDD 2.2 0.98 0.079 pg/g 1 8290A Total/NA Total TCDD 8.1 q 0.98 0.079 pg/g 1 8290A Total/NA 1,2,3,7,8-PeCDD 8.5 4.9 0.15 pg/g 1 8290A Total/NA Total PeCDD 23 q 4.9 0.15 pg/g 1 8290A Total/NA 1,2,3,4,7,8-HxCDD 11 B 4.9 2.1 pg/g 1 8290A Total/NA 1,2,3,6,7,8-HxCDD 89 4.9 1.9 pg/g 1 8290A Total/NA 1,2,3,7,8,9-HxCDD 34 4.9 1.9 pg/g 1 8290A Total/NA Total HxCDD 400 B 4.9 2.0 pg/g 1 8290A Total/NA 1,2,3,4,6,7,8-HpCDD 730 G B 10 10 pg/g 1 8290A Total/NA Total HpCDD 1300 G B 10 10 pg/g 1 8290A Total/NA OCDD 9900 G E B 10 10 pg/g 1 8290A Total/NA Total TCDF 10 q 0.98 0.097 pg/g 1 8290A Total/NA 1,2,3,7,8-PeCDF 2.1 J B 4.9 0.21 pg/g 1 8290A Total/NA 2,3,4,7,8-PeCDF 3.4 J B 4.9 0.25 pg/g 1 8290A Total/NA Total PeCDF 36 B 4.9 0.23 pg/g 1 8290A Total/NA 1,2,3,4,7,8-HxCDF 5.4 B 4.9 1.1 pg/g 1 8290A Total/NA 1,2,3,6,7,8-HxCDF 4.8 J B 4.9 0.99 pg/g 1 8290A Total/NA 2,3,4,6,7,8-HxCDF 6.2 B 4.9 0.82 pg/g 1 8290A Total/NA Total HxCDF 260 B 4.9 0.93 pg/g 1 8290A Total/NA 1,2,3,4,6,7,8-HpCDF 220 B 4.9 2.5 pg/g 1 8290A Total/NA 1,2,3,4,7,8,9-HpCDF 5.2 B 4.9 2.3 pg/g 1 8290A Total/NA Total HpCDF 600 B 4.9 2.4 pg/g 1 8290A Total/NA OCDF 210 B 9.8 0.20 pg/g 1 8290A Total/NA 2,3,7,8-TCDF - RA 3.6 0.98 0.087 pg/g 1 8290A Total/NA Incremented sample generated True NONE 1 Increment, prep Total/NA This Detection Summary does not include radiochemical test results. Eurofins Denver Page 7 of 51 6/7/2023 Detection Summary Client: SCS Engineers Job ID: 280-176200-2 Project/Site: Croman Mill Site, Ashland, Oregon Client Sample ID: DU01-230504-0.5-Rep2 Lab Sample ID: 280-176200-17 Analyte Result Qualifier RL EDL Unit Dil Fac D Method Prep Type 2,3,7,8-TCDD 0.82 J q 0.97 0.096 pg/g 1 8290A Total/NA Total TCDD 4.1 q 0.97 0.096 pg/g 1 8290A Total/NA 1,2,3,7,8-PeCDD 3.3 J q 4.8 0.16 pg/g 1 8290A Total/NA Total PeCDD 12 q 4.8 0.16 pg/g 1 8290A Total/NA 1,2,3,4,7,8-HxCDD 6.0 B 4.8 1.1 pg/g 1 8290A Total/NA 1,2,3,6,7,8-HxCDD 59 4.8 1.0 pg/g 1 8290A Total/NA 1,2,3,7,8,9-HxCDD 14 4.8 1.0 pg/g 1 8290A Total/NA Total HxCDD 250 B 4.8 1.1 pg/g 1 8290A Total/NA 1,2,3,4,6,7,8-HpCDD 370 G B 5.9 5.9 pg/g 1 8290A Total/NA Total HpCDD 680 G B 5.9 5.9 pg/g 1 8290A Total/NA OCDD 2500 B 9.7 3.2 pg/g 1 8290A Total/NA Total TCDF 8.8 q 0.97 0.090 pg/g 1 8290A Total/NA 1,2,3,7,8-PeCDF 1.3 J B 4.8 0.16 pg/g 1 8290A Total/NA 2,3,4,7,8-PeCDF 2.5 J B 4.8 0.19 pg/g 1 8290A Total/NA Total PeCDF 28 q B 4.8 0.17 pg/g 1 8290A Total/NA 1,2,3,4,7,8-HxCDF 3.6 J B 4.8 0.82 pg/g 1 8290A Total/NA 1,2,3,6,7,8-HxCDF 3.5 J B 4.8 0.75 pg/g 1 8290A Total/NA 2,3,4,6,7,8-HxCDF 4.4 J B 4.8 0.67 pg/g 1 8290A Total/NA Total HxCDF 190 q B 4.8 0.73 pg/g 1 8290A Total/NA 1,2,3,4,6,7,8-HpCDF 170 B 4.8 1.8 pg/g 1 8290A Total/NA 1,2,3,4,7,8,9-HpCDF 3.4 J B 4.8 1.7 pg/g 1 8290A Total/NA Total HpCDF 430 B 4.8 1.8 pg/g 1 8290A Total/NA OCDF 140 B 9.7 0.21 pg/g 1 8290A Total/NA 2,3,7,8-TCDF - RA 2.5 0.97 0.10 pg/g 1 8290A Total/NA Incremented sample generated True NONE 1 Increment, prep Total/NA Client Sample ID: DU02-230504-0.5 Lab Sample ID: 280-176200-18 Analyte Result Qualifier RL EDL Unit 1311 Fac D Method Prep Type 2,3,7,8-TCDD 14 0.98 0.086 pg/g 1 8290A Total/NA Total TCDD 120 0.98 0.086 pg/g 1 8290A Total/NA 1,2,3,7,8-PeCDD 46 q 4.9 0.58 pg/g 1 8290A Total/NA Total PeCDD 290 q 4.9 0.58 pg/g 1 8290A Total/NA 1,2,3,4,7,8-HxCDD 15 B G 10 10 pg/g 1 8290A Total/NA 1,2,3,6,7,8-HxCDD 440 G 9.6 9.6 pg/g 1 8290A Total/NA 1,2,3,7,8,9-HxCDD 180 G 9.3 9.3 pg/g 1 8290A Total/NA Total HxCDD 2400 B G 9.7 9.7 pg/g 1 8290A Total/NA 1,2,3,4,6,7,8-HpCDD 930 B G 10 10 pg/g 1 8290A Total/NA Total HpCDD 1400 B G 10 10 pg/g 1 8290A Total/NA OCDD 980 B 9.8 1.2 pg/g 1 8290A Total/NA Total TCDF 14 q 0.98 0.10 pg/g 1 8290A Total/NA 1,2,3,7,8-PeCDF 1.8 J B 4.9 0.22 pg/g 1 8290A Total/NA 2,3,4,7,8-PeCDF 2.8 J B 4.9 0.25 pg/g 1 8290A Total/NA Total PeCDF 42 B 4.9 0.23 pg/g 1 8290A Total/NA 1,2,3,4,7,8-HxCDF 8.7 B 4.9 2.6 pg/g 1 8290A Total/NA 1,2,3,6,7,8-HxCDF 11 B 4.9 2.4 pg/g 1 8290A Total/NA 2,3,4,6,7,8-HxCDF 9.7 B 4.9 2.1 pg/g 1 8290A Total/NA Total HxCDF 760 B 4.9 2.4 pg/g 1 8290A Total/NA 1,2,3,4,6,7,8-HpCDF 850 B G 7.2 7.2 pg/g 1 8290A Total/NA 1,2,3,4,7,8,9-HpCDF 14 B G 7.6 7.6 pg/g 1 8290A Total/NA Total HpCDF 2300 B G 7.4 7.4 pg/g 1 8290A Total/NA This Detection Summary does not include radiochemical test results. Eurofins Denver Page 8 of 51 6/7/2023 Detection Summary Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Client Sample ID: DU02-230504-0.5 (Continued) Analyte Result Qualifier OCDF 770 B 2,3,7,8-TCDF - RA 2.7 Incremented sample generated True Client Sample ID: DU03-230505-0.5 Analyte Result Qualifier 2,3,7,8-TCDD 10 Total TCDD 86 1,2,3,7,8-PeCDD 42 Total PeCDD 220 q 1,2,3,4,7,8-HxCDD 13 B G 1,2,3,6,7,8-HxCDD 350 F1 G 1,2,3,7,8,9-HxCDD 160 F1 G Total HxCDD 1900 B G 1,2,3,4,6,7,8-HpCDD 720 B G Total HpCDD 1100 B G OCDD 750 F1 B Total TCDF 9.9 q 1,2,3,7,8-PeCDF 1.1 J B q 2,3,4,7,8-PeCDF 2.2 J B Total PeCDF 29 B q 1,2,3,4,7,8-HxCDF 6.8 B 1,2,3,6,7,8-HxCDF 9.2 B 2,3,4,6,7,8-HxCDF 8.1 B Total HxCDF 560 B 1,2,3,4,6,7,8-HpCDF 670 B G 1,2,3,4,7,8,9-HpCDF 12 B G Total HpCDF 1800 B G OCDF 610 F1 B 2,3,7,8-TCDF - RA 1.9 Incremented sample generated True Client Sample ID: DU03-230505-0.5-Rep1 Analyte Result Qualifier 2,3,7,8-TCDD 14 Total TCDD 110 q 1,2,3,7,8-PeCDD 46 q Total PeCDD 260 q 1,2,3,4,7,8-HxCDD 15 B G 1,2,3,6,7,8-HxCDD 460 G 1,2,3,7,8,9-HxCDD 210 G Total HxCDD 2500 B G 1,2,3,4,6,7,8-HpCDD 990 B G Total HpCDD 1500 B G OCDD 960 B Total TCDF 11 q 1,2,3,7,8-PeCDF 1.9 J B 2,3,4,7,8-PeCDF 2.8 J B Total PeCDF 36 B q 1,2,3,4,7,8-HxCDF 8.8 B This Detection Summary does not include radiochemical test results. Job ID: 280-176200-2 Lab Sample ID: 280-176200-18 RL EDL Unit Dil Fac D Method Prep Type 9.8 0.88 pg/g 1 8290A Total/NA 0.98 0.11 pg/g 1 8290A Total/NA NONE 1 Increment, prep Total/NA Lab Sample ID: 280-176200-21 RL EDL Unit Dil Fac D Method Prep Type 0.97 0.34 pg/g 1 8290A Total/NA 0.97 0.34 pg/g 1 8290A Total/NA 4.9 0.66 pg/g 1 8290A Total/NA 4.9 0.66 pg/g 1 8290A Total/NA 7.6 7.6 pg/g 1 8290A Total/NA 7.6 7.6 pg/g 1 8290A Total/NA 7.2 7.2 pg/g 1 8290A Total/NA 7.5 7.5 pg/g 1 8290A Total/NA 9.0 9.0 pg/g 1 8290A Total/NA 9.0 9.0 pg/g 1 8290A Total/NA 9.7 1.4 pg/g 1 8290A Total/NA 0.97 0.18 pg/g 1 8290A Total/NA 4.9 0.36 pg/g 1 8290A Total/NA 4.9 0.41 pg/g 1 8290A Total/NA 4.9 0.39 pg/g 1 8290A Total/NA 4.9 2.0 pg/g 1 8290A Total/NA 4.9 2.0 pg/g 1 8290A Total/NA 4.9 1.7 pg/g 1 8290A Total/NA 4.9 1.9 pg/g 1 8290A Total/NA 6.5 6.5 pg/g 1 8290A Total/NA 6.6 6.6 pg/g 1 8290A Total/NA 6.6 6.6 pg/g 1 8290A Total/NA 9.7 0.77 pg/g 1 8290A Total/NA 0.97 0.11 pg/g 1 8290A Total/NA NONE 1 Increment, prep Total/NA Lab Sample ID: 280-176200-22 RL EDL Unit DII Fac D Method Prep Type 0.98 0.14 pg/g 1 8290A Total/NA 0.98 0.14 pg/g 1 8290A Total/NA 4.9 0.51 pg/g 1 8290A Total/NA 4.9 0.51 pg/g 1 8290A Total/NA 9.3 9.3 pg/g 1 8290A Total/NA 8.6 8.6 pg/g 1 8290A Total/NA 8.5 8.5 pg/g 1 8290A Total/NA 8.8 8.8 pg/g 1 8290A Total/NA 11 11 pg/g 1 8290A Total/NA 11 11 pg/g 1 8290A Total/NA 9.8 1.2 pg/g 1 8290A Total/NA 0.98 0.11 pg/g 1 8290A Total/NA 4.9 0.24 pg/g 1 8290A Total/NA 4.9 0.28 pg/g 1 8290A Total/NA 4.9 0.26 pg/g 1 8290A Total/NA 4.9 2.3 pg/g 1 8290A Total/NA Eurofins Denver Page 9 of 51 6/7/2023 Detection Summary Client: SCS Engineers Job ID: 280-176200-2 Project/Site: Croman Mill Site, Ashland, Oregon Client Sample ID: DU03-230505-0.5-Rep1 (Continued) Lab Sample ID: 280-176200-22 Analyte Result Qualifier RL EDL Unit Dil Fac D Method Prep Type 1,2,3,6,7,8-HxCDF 12 B 4.9 2.1 pg/g 1 8290A Total/NA 2,3,4,6,7,8-HxCDF 10 B 4.9 1.7 pg/g 1 8290A Total/NA Total HxCDF 700 B 4.9 2.0 pg/g 1 8290A Total/NA 1,2,3,4,6,7,8-HpCDF 900 B G 7.7 7.7 pg/g 1 8290A Total/NA 1,2,3,4,7,8,9-HpCDF 15 B G 7.7 7.7 pg/g 1 8290A Total/NA Total HpCDF 2500 B G 7.7 7.7 pg/g 1 8290A Total/NA OCDF 830 B 9.8 0.86 pg/g 1 8290A Total/NA i 2,3,7,8-TCDF - RA 2.6 0.98 0.19 pg/g 1 8290A Total/NA Incremented sample generated True NONE 1 Increment, prep Total/NA Client Sample ID: DU03-230505-0.5-Rep2 Lab Sample ID: 280-176200-23 Analyte Result Qualifier RL EDL Unit Dil Fac D Method Prep Type 2,3,7,8-TCDD 2.1 q 0.94 0.072 pg/g 1 8290A Total/NA Total TCDD 19 q 0.94 0.072 pg/g 1 8290A Total/NA 1,2,3,7,8-PeCDD 7.5 q 4.7 0.15 pg/g 1 8290A Total/NA Total PeCDD 46 q 4.7 0.15 pg/g 1 8290A Total/NA 1,2,3,4,7,8-HxCDD 2.5 J B 4.7 1.7 pg/g 1 8290A Total/NA 1,2,3,6,7,8-HxCDD 74 4.7 1.6 pg/g 1 8290A Total/NA 1,2,3,7,8,9-HxCDD 33 4.7 1.6 pg/g 1 8290A Total/NA Total HxCDD 400 B 4.7 1.6 pg/g 1 8290A Total/NA 1,2,3,4,6,7,8-HpCDD 170 B 4.7 2.0 pg/g 1 8290A TotaUNA Total HpCDD 260 B 4.7 2.0 pg/g 1 8290A Total/NA OCDD 250 B 9.4 0.37 pg/g 1 8290A Total/NA Total TCDF 3.8 q 0.94 0.069 pg/g 1 8290A Total/NA 1,2,3,7,8-PeCDF 0.32 J B q 4.7 0.10 pg/g 1 8290A Total/NA 2,3,4,7,8-PeCDF 0.69 J B q 4.7 0.12 pg/g 1 8290A Total/NA Total PeCDF 11 B q 4.7 0.11 pg/g 1 8290A Total/NA 1,2,3,4,7,8-HxCDF 1.9 J B 4.7 0.40 pg/g 1 8290A Total/NA 1,2,3,6,7,8-HxCDF 2.2 J B 4.7 0.36 pg/g 1 8290A Total/NA 2,3,4,6,7,8-HxCDF 1.9 J B q 4.7 0.31 pg/g 1 8290A Total/NA Total HxCDF 120 B q 4.7 0.36 pg/g 1 8290A Total/NA 1,2,3,4,6,7,8-HpCDF 140 B 4.7 1.3 pg/g 1 8290A Total/NA 1,2,3,4,7,8,9-HpCDF 2.5 J B 4.7 1.3 pg/g 1 8290A Total/NA Total HpCDF 380 B 4.7 1.3 pg/g 1 8290A Total/NA OCDF 140 B 9.4 0.19 pg/g 1 8290A Total/NA Incremented sample generated True NONE 1 Increment, prep Total/NA This Detection Summary does not include radiochemical test results. Eurofins Denver u Page 10 of 51 6/7/2023 Method Summary Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Method Method Description Protocol 8290A Dioxins and Furans (HRGC/HRMS) SW846 Increment, prep ISM - Dry, Disaggregate, Sieve, 2 D Slabcake Subsample EPA 8290 Soxhlet Extraction of Dioxins and Furans SW846 Job ID: 280-176200-2 Protocol References: EPA = US Environmental Protection Agency SW846 = "Test Methods For Evaluating Solid Waste, Physical/Chemical Methods", Third Edition, November 1986 And Its Updates. Laboratory References: EET DEN = Eurofins Denver, 4955 Yarrow Street, Arvada, CO 80002, TEL (303)736-0100 EET SAC = Eurofins Sacramento, 880 Riverside Parkway, West Sacramento, CA 95605, TEL (916)373-5600 Laboratory EET SAC EET DEN EET SAC Eurofins Denver 0 Page 11 of 51 6/7/2023 Sample Summary Client: SCS Engineers Job ID: 280-176200-2 Project/Site: Croman Mill Site, Ashland, Oregon Lab Sample ID Client Sample ID Matrix Collected Received 280-176200-3 DU05-SU06-230505-COMP01 Solid 05/05/23 10.20 05/09/23 09:15 280-176200-4 DU05-SU06-230505-COMP02 Solid 05/05/23 10:25 05/09/23 09:15 280-176200-15 DU01-230504-0.5 Solid 05/04/23 16:15 05/09/23 09:15 280-176200-16 DU01-230504-0.5-Rep1 Solid 05/04/23 16:25 05/09/23 09:15 280-176200-17 DU01-230504-0.5-Rep2 Solid 05/04/23 16:35 05/09/23 09:15 280-176200-18 DU02-230504-0.5 Solid 05/04/23 17:00 05/09/23 09:15 280-176200-21 DU03-230505-0.5 Solid 05/05/23 11:15 05/09/23 09:15 280-176200-22 DU03-230505-0.5-Rep1 Solid 05/05/23 11:20 05/09/23 09:15 280-176200-23 DU03-230505-0.5-Rep2 Solid 05/05/23 11:25 05/09/23 09:15 Page 12 of 51 Eurofins(PIK g Client Sample Results Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Method: SW846 8290A - Dioxins and Furans (HRGC/HRMS) Client Sample ID: DU05-SU06-230505-COMP01 Date Collected: 05/05/23 10:20 Date Received: 05/09/23 09:15 Analyte Result Qualifier RL EDL Unit D Job ID: 280-176200-2 Lab Sample ID: 280-176200-3 Matrix: Solid Percent Solids: 82.7 Prepared Analyzed Dil Fac 2,3,7,8-TCDD ND 1.1 0.052 pg/g D 05/11/23 10:19 05/29/23 04:50 1 2,3,7,8-TCDF ND G 1.3 1.3 pg/g a 05/11/23 10:19 05/29/23 04:50 1 1,2,3,7,8-PeCDD 1.2 J q 5.5 0.21 pg/g o 05/11/23 10:19 05/29/23 04:50 1 1,2,3,7,8-PeCDF ND 5.5 1.8 pg/g a 05/11/23 10:19 05/29/23 04:50 1 2,3,4,7,8-PeCDF 4.8 J 5.5 1.9 pg/g 05/11/23 10:19 05/29/23 04:50 1 1,2,3,4,7,8-HxCDD 1.3 J B 5.5 0.19 pg/g 05/11/23 10:19 05/29/23 04:50 1 1,2,3,6,7,8-HxCDD 4.5 J B 5.5 0.20 pg/g 05/11/23 10:19 05/29/23 04:50 1 1,2,3,7,8,9-HxCDD 3.1 J B 5.5 0.17 pg/g 05/11/23 10:19 05/29/23 04:50 1 1,2,3,4,7,8-HxCDF 5.2 J 5.5 0.87 pg/g 05/11/23 10:19 05/29/23 04:50 1 1,2,3,6,7,8-HxCDF 8.6 5.5 0.77 pg/g 05/11/23 10:19 05/29/23 04:50 1 1,2,3,7,8,9-HxCDF ND 5.5 0.81 pg/g 3:� 05/11/23 10:19 05/29/23 04:50 1 2,3,4,6,7,8-HxCDF 6.7 B 5.5 0.69 pg/g D 05/11/23 10:19 05/29/23 04:50 1 1,2,3,4,6,7,8-HpCDD 42 B 5.5 0.25 pg/g o 05/11/23 10:19 05/29/23 04:50 1 1,2,3,4,6,7,8-HpCDF 17 B 5.5 0.38 pg/g o 05/11/23 10:19 05/29/23 04:50 1 1,2,3,4,7,8,9-HpCDF 1.9 J B 5.5 0.40 pg/g o 05/11/23 10:19 05/29/23 04:50 1 OCDD 220 B 11 0.36 pg/g it 05/11/23 10:19 05/29/23 04:50 1 OCDF 16 B 11 0.11 pg/g 05/11/23 10:19 05/29/23 04:50 1 Total TCDD ND 1.1 0.32 pg/g 05/11/23 10:19 05/29/23 04:50 1 Total TCDF 49 q G 1.3 1.3 pg/g 05/11/23 10:19 05/29/23 04:50 1 Total PeCDD 4.7 J q 5.5 0.21 pg/g 05/11/23 10:19 05/29/23 04:50 1 Total PeCDF 89 5.5 1.8 pg/g a 05/11/23 10:19 05/29/23 04:50 1 Total HxCDD 38 B q 5.5 0.19 pg/g 05/11/23 10:19 05/29/23 04:50 1 Total HxCDF 140 B q 5.5 0.79 pg/g 05/11/23 10:19 05/29/23 04:50 1 Total HpCDD 84 B 5.5 0.25 pg/g 05/11/23 10:19 05/29/23 04:50 1 Total HpCDF 43 B 5.5 0.39 pg/g 05/11/23 10:19 05/29/23 04:50 1 Isotope Dilution %Recovery Qualifier Limits Prepared Analyzed Dil Fac 13C-2, 3, 7, 8-TCDD 60 40 -135 05111123 10:19 05/29/23 04:50 1 13C-2, 3, 7, 8-TCDF 50 40 -135 05/11/23 10:19 05/29/23 04:50 1 13C-1,2,3,7,8-PeCDD 70 40-135 05/11/23 10:19 05/29/23 04.50 1 13C-1,2,3,7,8-PeCDF 57 40-135 05/11/23 10:19 05129123 04:50 1 13C-1,2,3,6,7,8-HxCDD 66 40-135 05/11/23 10:19 05129123 04:50 1 13C-1, 2, 3, 4, 7, 8-HxCDF 53 40 -135 05/11/23 10:19 05129123 04:50 1 13C-1, 2, 3, 4, 6, 7, 8-HpCDD 70 40 - 135 05111123 10:19 05/29/23 04:50 1 13C-1, 2, 3, 4, 6, 7, 8-HpCDF 58 40 - 135 05111123 10:19 05129123 04:50 1 13C-OCDD 67 40 -135 05111123 10:19 05/29/23 04.50 1 13C-OCDF 57 40-135 05/11/23 10:19 05129123 04:50 1 13C-1,2,3,7,8,9-HxCDF 51 40-135 05111123 10:19 05/29/23 04:50 1 13C-1,2,3,4,7,8-HxCDD 63 40- 135 05111123 10:19 05/29/23 04:50 1 13C-1,2,3,6,7,8-HxCDF 60 40-135 05111123 10:19 05129123 04:50 1 13C-2,3,4,7,8-PeCDF 57 40-135 05111123 10:19 05/29/23 04.50 1 13C-2, 3, 4, 6, 7, 8-HxCDF 61 40 -135 05/11123 10:19 05/29/23 04:50 1 13C-1, 2, 3, 4, 7, 8, 9-HpCDF 60 40 -135 05/11/23 10:19 05/29/23 04:50 1 Client Sample ID: DU05-SU06-230505-COMP02 Date Collected: 05/05/23 10:25 Date Received: 05/09/23 09:15 Analyte Result Qualifier 2,3,7,8-TCDD ND 2,3,7,8-TCDF ND Lab Sample ID: 280-176200-4 Matrix: Solid Percent Solids: 83.5 RL EDL Unit D Prepared Analyzed Dil Fac 1.2 0.072 pg/g 05/11/23 10:19 05/29/23 05:38 1 1.2 0.55 pg/g 05/11/23 10:19 05/29/23 05:38 1 Eurofins Denver Page 13 of 51 6/7/2023 Client Sample Results Client: SCS Engineers Job ID: 280-176200-2 Project/Site: Croman Mill Site, Ashland, Oregon Method: SW846 8290A - Dioxins and Furans (HRGC/HRMS) (Continued) Client Sample ID: DU05-SU06-230505-COMP02 Lab Sample ID: 280-176200-4 Date Collected: 05/05/23 10:25 Matrix: Solid Date Received: 05/09/23 09:15 Percent Solids: 83.5 Analyte Result Qualifier RL EDL Unit D Prepared Analyzed Dil Fac 1,2,3,7,8-PeCDD 1.5 J 5.8 0.19 pg/g 05/11/23 10:19 05/29/23 05:38 1 1,2,3,7,8-PeCDF ND 5.8 1.5 pg/g 05/11/23 10:19 05/29/23 05:38 1 2,3,4,7,8-PeCDF 3.5 J q 5.8 1.7 pg/g 05/11/23 10:19 05/29/23 05:38 1 1,2,3,4,7,8-HxCDD 1.1 J B q 5.8 0.25 pg/g 05/11/23 10:19 05/29/23 05:38 1 1,2,3,6,7,8-HxCDD 5.1 J B 5.8 0.25 pg/g 05/11/23 10:19 05/29/23 05:38 1 1,2,3,7,8,9-HxCDD 3.3 J B 5.8 0.22 pg/g 05/11/23 10:19 05/29/23 05:38 1 1,2,3,4,7,8-HxCDF 5.2 J 5.8 0.76 pg/g 05/11/23 10:19 05/29/23 05:38 1 1,2,3,6,7,8-HxCDF 7.9 5.8 0.67 pg/g 05/11/23 10:19 05/29/23 05:38 1 1,2,3,7,8,9-HxCDF ND 5.8 0.67 pg/g 05/11/23 10:19 05/29/23 05:38 1 2,3,4,6,7,8-HxCDF 7.1 B 5.8 0.60 pg/g a 05/11/23 10:19 05/29/23 05:38 1 1,2,3,4,6,7,8-HpCDD 46 B 5.8 0.27 pg/g 05/11/23 10:19 05/29/23 05:38 1 1,2,3,4,6,7,8-HpCDF 18 B 5.8 0.34 pg/g a 05/11/23 10:19 05/29/23 05:38 1 1,2,3,4,7,8,9-HpCDF 1.6 J B 5.8 0.34 pg/g 05/11/23 10:19 05/29/23 05:38 1 OCDD 260 B 12 0.49 pg/g 05/11/23 10:19 05/29/23 05:38 1 OCDF 17 B 12 0.13 pg/g 05/11/23 10:19 05/29/23 05:38 1 Total TCDD ND 1.2 0.55 pg/g 05/11/23 10:19 05/29/23 05:38 1 Total TCDF 47 q 1.2 0.55 pg/g 05/11/23 10:19 05/29/23 05:38 1 Total PeCDD 10 q 5.8 0.19 pg/g 05/11/23 10:19 05/29/23 05:38 1 Total PeCDF 83 q 5.8 1.6 pg/g 05/11/23 10:19 05/29/23 05:38 1 Total HxCDD 41 B q 5.8 0.24 pg/g 05/11/23 10:19 05/29/23 05:38 1 Total HxCDF 150 B 5.8 0.68 pg/g 05/11/23 10:19 05/29/23 05:38 1 Total HpCDD 91 B 5.8 0.27 pg/g 05/11/23 10:19 05/29/23 05:38 1 Total HpCDF 47 B 5.8 0.34 pg/g 05/11/23 10:19 05/29/23 05:38 1 Isotope Dilution %Recovery Qualifier Limits Prepared Analyzed Dil Fac 13C-2, 3, 7, 8-TCDD 56 40 -135 05111123 10:19 05129123 05:38 1 13C-2,3,7,8-TCDF 48 40-135 05/11/23 10:19 05129123 05:38 1 13C-1,2,3,7,8-PeCDD 62 40-135 05111123 10:19 05129123 05:38 1 13C-1,2,3,7,8-PeCDF 56 40-135 05/11/23 10:19 05/29/23 05:38 1 13C-1, 2, 3, 6, 7, 8-HxCDD 58 40 -135 05111123 10.19 05/29/23 05:38 1 13C-1,2,3,4,7,8-HxCDF 48 40-135 05/11/23 10:19 05129123 05:38 1 13C-1,2,3,4,6,7,8-HpCDD 66 40-135 05/11/23 10:19 05129123 05:38 1 13C-1,2,3,4,6,7,8-HpCDF 52 40-135 05111123 10:19 05/29/23 05:38 1 13C-OCDD 63 40-135 05111123 10:19 05/29/23 05:38 1 13C-OCDF 54 40 - 135 05111123 10:19 05129123 05:38 1 13C-1,2,3,7,8,9-HxCDF 50 40-135 05111123 10:19 05129123 05:38 1 13C-1,2,3,4,7,8-HxCDD 56 40-135 05111123 10:19 05129123 05:38 1 13C-1, 2, 3, 6, 7, 8-HxCDF 54 40 -135 05111123 10:19 05129123 05:38 1 13C-2, 3, 4, 7, 8-PeCDF 52 40 -135 05111123 10:19 05129123 05:38 1 13C-2, 3, 4, 6, 7, 8-HxCDF 56 40 -135 05111123 10:19 05/29/23 05:38 1 13C-1,2,3,4,7,8,9-HpCDF 58 40-135 05111123 10:19 05/29/23 05:38 1 Client Sample ID: DU01-230504-0.5 Lab Sample ID: 280-176200-15 Date Collected: 05/04/23 16:15 Matrix: Solid Date Received: 05/09/23 09:15 Analyte Result Qualifier RL EDL Unit D Prepared Analyzed Dil Fac 2,3,7,8-TCDD 0.94 J q 0.99 0.071 pg/g 05/18/23 08:09 06/04/23 22:34 1 Total TCDD 4.7 q 0.99 0.071 pg/g 05/18/23 08:09 06/04/23 22:34 1 1,2,3,7,8-PeCDD 4.2 J 4.9 0.20 pg/g 05/18/23 08:09 06/04/23 22:34 1 Total PeCDD 14 q 4.9 0.20 pg/g 05/18/23 08:09 06/04/23 22:34 1 Eurofins Denver Page 14 of 51 6/7/2023 Client Sample Results Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Method: SW846 8290A - Dioxins and Furans (HRGC/HRMS) (Continued) Job ID: 280-176200-2 Client Sample ID: DU01-230504-0.5 Lab Sample ID: 280-176200-15 Date Collected: 05/04/23 16:15 Matrix: Solid Date Received: 05/09/23 09:15 Analyte Result Qualifier RL EDL Unit D Prepared Analyzed Dil Fac 1,2,3,4,7,8-HxCDD 6.9 B 4.9 1.4 pg/g 05/18/23 08:09 06/04/23 22:34 1 1,2,3,6,7,8-HxCDD 66 4.9 1.3 pg/9 05/18/23 08:09 06/04/23 22:34 1 1,2,3,7,8,9-HxCDD 16 4.9 1.3 pg/g 05/18/23 08:09 06/04/23 22:34 1 Total HxCDD 280 B 4.9 1.3 pg/g 05/18/23 08:09 06/04/23 22:34 1 1,2,3,4,6,7,8-HpCDD 400 B G 6.9 6.9 pg/g 05/18/23 08:09 06/04/23 22:34 1 Total HpCDD 740 B G 6.9 6.9 pg/g 05/18/23 08:09 06/04/23 22:34 1 OCDD 3100 B 9.9 4.6 pg/g 05/18/23 08:09 06/04/23 22:34 1 Total TCDF 8.0 q 0.99 0.070 pg/g 05/18/23 08:09 06/04/23 22:34 1 1,2,3,7,8-PeCDF 1.6 J B 4.9 0.19 pg/g 05/18/23 08:09 06/04/23 22:34 1 2,3,4,7,8-PeCDF 3.0 J B 4.9 0.22 pg/g 05/18/23 08:09 06/04/23 22:34 1 Total PeCDF 29 B q 4.9 0.20 pg/g 05/18/23 08:09 06/04/23 22:34 1 1,2,3,4,7,8-HxCDF 4.3 J B 4.9 0.72 pg/g 05/18/23 08:09 06/04/23 22:34 1 1,2,3,6,7,8-HxCDF 4.0 J B 4.9 0.66 pg/g 05/18/23 08:09 06/04/23 22:34 1 2,3,4,6,7,8-HxCDF 5.0 B 4.9 0.59 pg/g 05/18/23 08:09 06/04/23 22:34 1 1,2,3,7,8,9-HxCDF ND 4.9 0.64 pg/g 05/18/23 08:09 06/04/23 22:34 1 Total HxCDF 210 B 4.9 0.65 pg/g 05/18/23 08:09 06/04/23 22:34 1 1,2,3,4,6,7,8-HpCDF 180 B 4.9 1.9 pg/g 05/18/23 08:09 06/04/23 22:34 1 1,2,3,4,7,8,9-HpCDF 3.9 J B 4.9 1.9 pg/g 05/18/23 08:09 06/04/23 22:34 1 Total HpCDF 470 B 4.9 1.9 pg/g 05/18/23 08:09 06/04/23 22:34 1 OCDF 150 B 9.9 0.18 pg/g 05/18/23 08:09 06/04/23 22:34 1 Isotope Dilution %Recovery Qualifier Limits Prepared Analyzed Dil Fac 13C-2, 3, 7, 8-TCDD 67 40 -135 05118123 08:09 06104123 22:34 1 13C-1,2,3,7,8-PeCDD 65 40-135 05118123 08:09 06104123 22:34 1 13C-1,2,3,6,7,8-HxCDD 63 40-135 05118123 08:09 06104123 22:34 1 13C-1,2,3,4,6,7,8-HpCDD 67 40-135 05118123 08:09 06104123 22:34 1 13C-OCDD 73 40 -135 05118123 08:09 06104123 22.34 1 13C-2,3, 7, 8-TCDF 75 40 - 135 05/18/23 08:09 06104123 22:34 1 13C-1,2,3,7,8-PeCDF 72 40-135 05/18/23 08:09 06104123 22:34 1 13C-1,2,3,4,7,8-HxCDF 77 40-135 05118123 08:09 06104123 22:34 1 13C-1,2,3,4,6,7,8-HpCDF 66 40-135 05/18/23 08:09 06104123 22:34 1 13C-OCDF 80 40-135 05/18/23 08:09 06104123 22:34 1 13C-1,2,3,7,8,9-HxCDF 82 40- 135 05118123 08:09 06104123 22:34 1 13C-1,2,3,4,7,8-HxCDD 65 40-135 05118123 08:09 06104123 22:34 1 13C-1, 2, 3, 6, 7, 8-HxCDF 78 40 - 135 05118123 08:09 06/04/23 22:34 1 13C-2, 3, 4, 7, 8-PeCDF 67 40 -135 05118123 08:09 06104123 22:34 1 13C-2, 3, 4, 6, 7, 8-HxCDF 85 40 -135 05118123 08:09 06104123 22:34 1 13C-1,2,3,4,7,8,9-HpCDF 74 40-135 05118123 08:09 06104123 22:34 1 Client Sample ID: DU01-230504-0.5-Rep1 Lab Sample ID: 280-176200-16 Date Collected: 05/04/23 16:25 Matrix: Solid Date Received: 05/09/23 09:15 Analyte Result Qualifier RL EDL Unit D Prepared Analyzed Dil Fac 2,3,7,8-TCDD 2.2 0.98 0.079 pg/g 05/18/23 08:09 06/04/23 23:22 1 Total TCDD 8.1 q 0.98 0.079 pg/g 05/18/23 08:09 06/04/23 23:22 1 1,2,3,7,8-PeCDD 8.5 4.9 0.15 pg/g 05/18/23 08:09 06/04/23 23:22 1 Total PeCDD 23 q 4.9 0.15 pg/g 05/18/23 08:09 06/04/23 23:22 1 1,2,3,4,7,8-HxCDD 11 B 4.9 2.1 pg/g 05/18/23 08:09 06/04/23 23:22 1 1,2,3,6,7,8-HxCDD 89 4.9 1.9 pg/g 05/18/23 08:09 06/04/23 23:22 1 1,2,3,7,8,9-HxCDD 34 4.9 1.9 pg/g 05/18/23 08:09 06/04/23 23:22 1 Eurofins Denver Page 15 of 51 6/7/2023 Client Sample Results Client: SCS Engineers Job ID: 280-176200-2 Project/Site: Croman Mill Site, Ashland, Oregon Method: SW846 8290A - Dioxins and Furans (HRGC/HRMS) (Continued) Client Sample ID: DU01-230504-0.5-Rep1 Lab Sample ID: 280-176200-16 Date Collected: 05/04/23 16:25 Matrix: Solid Date Received: 05/09/23 09:15 Analyte Result Qualifier RL EDL Unit D Prepared Analyzed Dil Fac Total HxCDD 400 B 4.9 2.0 pg/g 05/18/23 08:09 06/04/23 23:22 1 1,2,3,4,6,7,8-HpCDD 730 G B 10 10 pg/g 05/18/23 08:09 06/04/23 23:22 1 Total HpCDD 1300 G B 10 10 pg/g 05/18/23 08:09 06/04/23 23:22 1 OCDD 9900 G E B 10 10 pg/g 05/18/23 08:09 06/04/23 23:22 1 Total TCDF 10 q 0.98 0.097 pg/g 05/18/23 08:09 06/04/23 23:22 1 1,2,3,7,8-PeCDF 2.1 J B 4.9 0.21 pg/g 05/18/23 08:09 06/04/23 23:22 1 2,3,4,7,8-PeCDF 3.4 J B 4.9 0.25 pg/g 05/18/23 08:09 06/04/23 23:22 1 Total PeCDF 36 B 4.9 0.23 pg/g 05/18/23 08:09 06/04/23 23:22 1 1,2,3,4,7,8-HxCDF 5.4 B 4.9 1.1 pg/g 05/18/23 08:09 06/04/23 23:22 1 1,2,3,6,7,8-HxCDF 4.8 J B 4.9 0.99 pg/g 05/18/23 08:09 06/04/23 23:22 1 2,3,4,6,7,8-HxCDF 6.2 B 4.9 0.82 pg/g 05/18/23 08:09 06/04/23 23:22 1 1,2,3,7,8,9-HxCDF ND 4.9 0.86 pg/g 05/18/23 08:09 06/04/23 23:22 1 Total HxCDF 260 B 4.9 0.93 pg/g 05/18/23 08:09 06/04/23 23:22 1 1,2,3,4,6,7,8-HpCDF 220 B 4.9 2.5 pg/g 05/18/23 08:09 06/04/23 23:22 1 1,2,3,4,7,8,9-HpCDF 5.2 B 4.9 2.3 pg/g 05/18/23 08:09 06/04/23 23:22 1 Total HpCDF 600 B 4.9 2.4 pg/g 05/18/23 08:09 06/04/23 23:22 1 OCDF 210 B 9.8 0.20 pg/g 05/18/23 08:09 06/04/23 23:22 1 Isotope Dilution %Recovery Qualifier Limits Prepared Analyzed Dil Fac 13C-2, 3, 7, 8-TCDD 70 40 -135 05/18/23 08:09 06104123 23:22 1 13C-1,2,3,7,8-PeCDD 64 40-135 05118123 08:09 06/04/23 23:22 1 13C-1, 2, 3, 6, 7, 8-HxCDD 63 40 -135 05118123 08:09 06104123 23:22 1 13C-1,2,3,4,6,7,8-HpCDD 72 40-135 0511812306.09 06104123 23:22 1 13C-OCDD 82 40 - 135 05118123 08:09 06104123 23:22 1 13C-2,3, 7, 8-TCDF 74 40 - 135 05118123 08:09 06104123 23:22 1 13C- 1, 2, 3, 7, 8-PeCDF 73 40 -135 05118123 08:09 06/04/23 23:22 1 13C-1,2,3,4,7,8-HxCDF 75 40-135 05118123 08:09 06104123 23:22 1 13C-1,2,3,4,6,7,8-HpCDF 66 40-135 05118123 08:09 06104123 23:22 1 13C-OCDF 88 40 -135 05118123 08:09 06104123 23:22 1 13C-1,2,3,7,8,9-HxCDF 87 40-135 05118123 08:09 06104123 23:22 1 13C-1,2,3,4,7,8-HxCDD 66 40-135 05118123 08:09 0610412323.22 1 13C-1,2,3,6,7,8-HxCDF 74 40-135 05118123 08:09 06104123 23:22 1 13C-2, 3, 4, 7, 8-PeCDF 67 40 -135 05/18/23 08:09 06104123 23:22 1 13C-2, 3, 4, 6, 7, 8-HxCDF 88 40 -135 05/18/23 08:09 06104123 23:22 1 13C-1, 2, 3, 4, 7, 8, 9-HpCDF 80 40 -135 05/18/23 08:09 06104123 23:22 1 Client Sample ID: DU01-230504-0.5-Rep2 Lab Sample ID: 280-176200-17 Date Collected: 05/04/23 16:35 Matrix: Solid Date Received: 05/09/23 09:15 Analyte Result Qualifier RL EDL Unit D Prepared Analyzed oil Fac 2,3,7,8-TCDD 0.82 J q 0.97 0.096 pg/g 05/18/23 08:09 06/05/23 00:09 1 Total TCDD 4.1 q 0.97 0.096 pg/g 05/18/23 08:09 06/05/23 00:09 1 1,2,3,7,8-PeCDD 3.3 J q 4.8 0.16 pg/g 05/18/23 08:09 06/05/23 00:09 1 Total PeCDD 12 q 4.8 0.16 pg/g 05/18/23 08:09 06/05/23 00:09 1 1,2,3,4,7,8-HxCDD 6.0 B 4.8 1.1 pg/g 05/18/23 08:09 06/05/23 00:09 1 1,2,3,6,7,8-HxCDD 59 4.8 1.0 pg/g 05/18/23 08:09 06/05/23 00:09 1 1,2,3,7,8,9-HxCDD 14 4.8 1.0 pg/g 05/18/23 08:09 06/05/23 00:09 1 Total HxCDD 250 B 4.8 1.1 pg/g 05/18/23 08:09 06/05/23 00:09 1 1,2,3,4,6,7,8-HpCDD 370 G B 5.9 5.9 pg/g 05/18/23 08:09 06/05/23 00:09 1 Total HpCDD 680 G B 5.9 5.9 pg/g 05/18/23 08:09 06/05/23 00:09 1 Eurofins Denver 0 Page 16 of 51 6/7/2023 Client Sample Results Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Method: SW846 8290A - Dioxins and Furans (HRGC/HRMS) (Continued) Client Sample ID: DU01-230504-0.5-Rep2 Date Collected: 05/04/23 16:35 Date Received: 05/09/23 09:15 Analyte Result Qualifier OCDD 2500 B Total TCDF 8.8 q 1,2,3,7,8-PeCDF 1.3 J B 2,3,4,7,8-PeCDF 2.5 J B Total PeCDF 28 q B 1,2,3,4,7,8-HxCDF 3.6 J B 1,2,3,6,7,8-HxCDF 3.5 J B 2,3,4,6,7,8-HxCDF 4.4 J B 1,2,3,7,8,9-HxCDF ND Total HxCDF 190 q B 1,2,3,4,6,7,8-HpCDF 170 B 1,2,3,4,7,8,9-HpCDF 3.4 J B Total HpCDF 430 B OCDF 140 B Isotope Dilution %Recovery Qualifier 13C-2, 3, 7, 8-TCDD 55 13C-1, 2, 3, 7, 8-PeCDD 50 13C-1, 2, 3, 6, 7, 8-HxCDD 49 13C-1,2,3,4,6,7,8-HpCDD 53 13C-OCDD 58 13C-2, 3, 7, 8-TCDF 60 13C-1, 2, 3, 7, 8-PeCDF 56 13C-1,2,3,4,7,8-HxCDF 59 13C-1, 2, 3, 4, 6, 7, 8-HpCDF 52 13C-OCDF 64 13C-1, 2, 3, 7, 8, 9-HxCDF 66 13C-1, 2, 3,4, 7, 8-HxCDD 51 13C-1, 2, 3, 6, 7, 8-HxCDF 60 13C-2,3,4, 7,8-PeCDF 53 13C-2, 3, 4, 6, 7, 8-HxCDF 67 13C-1, 2, 3, 4, 7, 8, 9-HpCDF 60 Client Sample ID: DU02-230504-0.5 Date Collected: 05/04/23 17:00 Date Received: 05/09/23 09:15 Analyte 2,3,7,8-TCDD Total TCDD 1,2,3,7,8-PeCDD Total PeCDD 1,2,3,4,7,8-HxCDD 1,2,3,6,7,8-HxCDD 1,2,3,7,8,9-HxCDD Total HxCDD 1,2,3,4,6,7,8-HpCDD Total HpCDD OCDD Total TCDF 1,2,3,7,8-PeCDF Job ID: 280-176200-2 Lab Sample ID: 280-176200-17 Matrix: Solid RL EDL Unit D Prepared Analyzed Dil Fac 9.7 3.2 pg/g 05/18/23 08:09 06/05/23 00:09 1 0.97 0.090 pg/g 05/18/23 08:09 06/05/23 00:09 1 4.8 0.16 pg/g 05/18/23 08:09 06/05/23 00:09 1 4.8 0.19 pg/g 05/18/23 08:09 06/05/23 00:09 1 4.8 0.17 pg/g 05/18/23 08:09 06/05/23 00:09 1 4.8 0.82 pg/g 05/18/23 08:09 06/05/23 00:09 1 4.8 0.75 pg/g 05/18/23 08:09 06/05/23 00:09 1 4.8 0.67 pg/g 05/18/23 08:09 06/05/23 00:09 1 4.8 0.69 pg/g 05/18/23 08:09 06/05/23 00:09 1 4.8 0.73 pg/g 05/18/23 08:09 06/05/23 00:09 1 4.8 1.8 pg/g 05/18/23 08:09 06/05/23 00:09 1 4.8 1.7 pg/g 05/18/23 08:09 06/05/23 00:09 1 4.8 1.8 pg/g 05/18/23 08:09 06/05/23 00:09 1 9.7 0.21 pg/g 05/18/23 08:09 06/05/23 00:09 1 Limits Prepared Analyzed Dil Fac 40 -135 05118123 08:09 06105123 00:09 1 40 -135 05/18/23 08:09 06/05/23 00:09 1 40 -135 05/18/23 08:09 06/05/23 00:09 1 40 -135 05118123 08:09 06105123 00:09 1 40 -135 05/18/23 08:09 06/05/23 00:09 1 40 -135 05118123 08:09 06105123 00:09 1 40 - 135 05/18/23 08:09 06105123 00:09 1 40 -135 05118123 08:09 06105123 00:09 1 40 -135 05118123 08:09 06105123 00:09 1 40 -135 05118123 08:09 06105123 00:09 1 40 -135 05/18/23 08:09 06/05/23 00:09 1 40 -135 05118123 08:09 06/05/23 00:09 1 40 -135 05118123 08:09 06105123 00.09 1 40 -135 05/18/23 08:09 06105123 00:09 1 40 -135 05/18/23 08:09 06/05/23 00:09 1 40 -135 05/18/23 08:09 06105123 00.09 1 Lab Sample ID: 280-176200-18 Matrix: Solid Result Qualifier RL EDL Unit D Prepared Analyzed Dil Fac 14 0.98 0.086 pg/g 05/18/23 08:09 06/05/23 00:57 1 120 0.98 0.086 pg/g 05/18/23 08:09 06/05/23 00:57 1 46 q 4.9 0.58 pg/g 05/18/23 08:09 06/05/23 00:57 1 290 q 4.9 0.58 pg/g 05/18/23 08:09 06/05/23 00:57 1 15 B G 10 10 pg/g 05/18/23 08:09 06/05/23 00:57 1 440 G 9.6 9.6 pg/g 05/18/23 08:09 06/05/23 00:57 1 180 G 9.3 9.3 pg/g 05/18/23 08:09 06/05/23 00:57 1 2400 B G 9.7 9.7 pg/g 05/18/23 08:09 06/05/23 00:57 1 930 B G 10 10 pg/g 05/18/23 08:09 06/05/23 00:57 1 1400 B G 10 10 pg/g 05/18/23 08:09 06/05/23 00:57 1 980 B 9.8 1.2 pg/g 05/18/23 08:09 06/05/23 00:57 1 14 q 0.98 0.10 pg/g 05/18/23 08:09 06/05/23 00:57 1 1.8 J B 4.9 0.22 pg/g 05/18/23 08:09 06/05/23 00:57 1 Eurofins Denver Page 17 of 51 6/7/2023 Client Sample Results Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Method: SW846 8290A - Dioxins and Furans (HRGC/HRMS) (Continued) Job ID: 280-176200-2 Client Sample ID: DIJ02-230504-0.5 Lab Sample ID: 280-176200-18 Date Collected: 05/04/23 17:00 Matrix: Solid Date Received: 05/09/23 09:15 Analyte Result Qualifier RL EDL Unit D Prepared Analyzed Dil Fac 2,3,4,7,8-PeCDF 2.8 J B 4.9 0.25 pg/g 05/18/23 08:09 06/05/23 00:57 1 j Total PeCDF 42 B 4.9 0.23 pg/g 05/18/23 08:09 06/05/23 00:57 1 1,2,3,4,7,8-HxCDF 8.7 B 4.9 2.6 pg/g 05/18/23 08:09 06/05/23 00:57 1 1,2,3,6,7,8-HxCDF 11 B 4.9 2.4 pg/g 05/18/23 08:09 06/05/23 00:57 1 2,3,4,6,7,8-HxCDF 9.7 B 4.9 2.1 pg/g 05/18/23 08:09 06/05/23 00:57 1 1,2,3,7,8,9-HxCDF ND 4.9 2.4 pg/g 05/18/23 08:09 06/05/23 00:57 1 Total HxCDF 760 B 4.9 2.4 pg/g 05/18/23 08:09 06/05/23 00:57 1 1,2,3,4,6,7,8-HpCDF 850 B G 7.2 7.2 pg/g 05/18/23 08:09 06/05/23 00:57 1 1,2,3,4,7,8,9-HpCDF 14 B G 7.6 7.6 pg/g 05/18/23 08:09 06/05/23 00:57 1 Total HpCDF 2300 B G 7.4 7.4 pg/g 05/18/23 08:09 06/05/23 00:57 1 OCDF 770 B 9.8 0.88 pg/g 05/18/23 08:09 06/05/23 00:57 1 Isotope Dilution %Recovery Qualifier Limits Prepared Analyzed DR Fac 13C-2, 3, 7, 8-TCDD 70 40 -135 05/18/23 08:09 06/05/23 00:57 1 13C-1,2,3,7,8-PeCDD 66 40-135 05118123 08:09 06/05/23 00:57 1 13C-1, 2, 3, 6, 7, 8-HxCDD 67 40 -135 05/18/23 08:09 06/05/23 00:57 1 13C-1, 2, 3, 4, 6, 7, 8-HpCDD 70 40 -135 05/18/23 08:09 06105123 00:57 1 13C-OCDD 75 40 -135 05/18/23 08:09 06/05/23 00:57 1 13C-2,3, 7,8-TCDF 68 q 40-135 05118123 08:09 06105123 00:57 1 13C-1, 2, 3, 7, 8-PeCDF 74 40 -135 05/18/23 08:09 06105123 00:57 1 13C-1,2,3,4,7,8-HxCDF 79 40-135 05118123 08:09 06105123 00:57 1 13C-1, 2, 3, 4, 6, 7, 8-HpCDF 70 40 -135 05/18/23 08.09 06105123 00:57 1 13C-OCDF 84 40 - 135 05/18/23 08:09 06105123 00:57 1 13C-1,2,3,7,8,9-HxCDF 82 40-135 05118123 08:09 06105123 00:57 1 13C-1,2,3,4,7,8-HxCDD 68 40-135 05/18/23 08:09 06105123 00:57 1 13C-1, 2, 3, 6, 7, 8-HxCDF 79 40 -135 05/18/23 08:09 06105123 00:57 1 13C-2,3,4,7,8-PeCDF 71 40-135 05118123 08:09 06105123 00:57 1 13C-2, 3, 4, 6, 7, 8-HxCDF 85 40 -135 05118123 08:09 06105123 00:57 1 13C-1,2,3,4,7,8,9-HpCDF 78 40-135 05118123 08:09 06105123 00:57 1 Client Sample ID: DIJ03-230505-0.5 Lab Sample ID: 280-176200-21 Date Collected: 05/05/23 11:15 Matrix: Solid Date Received: 05/09/23 09:15 Analyte Result Qualifier RL EDL Unit D Prepared Analyzed Dil Fac 2,3,7,8-TCDD 10 0.97 0.34 pg/g 05/18/23 08:09 06/05/23 01:44 1 Total TCDD 86 0.97 0.34 pg/g 05/18/23 08:09 06/05/23 01:44 1 1,2,3,7,8-PeCDD 42 4.9 0.66 pg/g 05/18/23 08:09 06/05/23 01:44 1 Total PeCDD 220 q 4.9 0.66 pg/g 05/18/23 08:09 06/05/23 01:44 1 1,2,3,4,7,8-HxCDD 13 B G 7.6 7.6 pg/g 05/18/23 08:09 06/05/23 01:44 1 1,2,3,6,7,8-HxCDD 350 F1 G 7.6 7.6 pg/g 05/18/23 08:09 06/05/23 01:44 1 1,2,3,7,8,9-HxCDD 160 F1 G 7.2 7.2 pg/g 05/18/23 08:09 06/05/23 01:44 1 Total HxCDD 1900 B G 7.5 7.5 pg/g 05/18/23 08:09 06/05/23 01:44 1 1,2,3,4,6,7,8-HpCDD 720 B G 9.0 9.0 pg/g 05/18/23 08:09 06/05/23 01:44 1 Total HpCDD 1100 B G 9.0 9.0 pg/g 05/18/23 08:09 06/05/23 01:44 1 OCDD 750 F1 B 9.7 1.4 pg/g 05/18/23 08:09 06/05/23 01:44 1 Total TCDF 9.9 q 0.97 0.18 pg/g 05/18/23 08:09 06/05/23 01:44 1 1,2,3,7,8-PeCDF 1.1 J B q 4.9 0.36 pg/g 05/18/23 08:09 06/05/23 01:44 1 2,3,4,7,8-PeCDF 2.2 J B 4.9 0.41 pg/g 05/18/23 08:09 06/05/23 01:44 1 Total PeCDF 29 B q 4.9 0.39 pg/g 05/18/23 08:09 06/05/23 01:44 1 1,2,3,4,7,8-HxCDF 6.8 B 4.9 2.0 pg/g 05/18/23 08:09 06/05/23 01:44 1 Eurofins Denver Page 18 of 51 6/7/2023 Client Sample Results Client: SCS Engineers Job ID: 280-176200-2 Project/Site: Croman Mill Site, Ashland, Oregon Method: SW846 8290A - Dioxins and Furans (HRGC/HRMS) (Continued) Client Sample ID: DU03-230505-0.5 Lab Sample ID: 280-176200-21 Date Collected: 05/05/23 11:15 Matrix: Solid Date Received: 05/09/23 09:15 Analyte Result Qualifier RL EDL Unit D Prepared Analyzed Dil Fac 1,2,3,6,7,8-HxCDF 9.2 B 4.9 2.0 pg/g 05/18/23 08:09 06/05/23 01:44 1 2,3,4,6,7,8-HxCDF 8.1 B 4.9 1.7 pg/g 05/18/23 08:09 06/05/23 01:44 1 1,2,3,7,8,9-HxCDF ND 4.9 1.9 pg/g 05/18/23 08:09 06/05/23 01:44 1 Total HxCDF 560 B 4.9 1.9 pg/g 05/18/23 08:09 06/05/23 01:44 1 1,2,3,4,6,7,8-HpCDF 670 B G 6.5 6.5 pg/g 05/18/23 08:09 06/05/23 01:44 1 1,2,3,4,7,8,9-HpCDF 12 B G 6.6 6.6 pg/g 05/18/23 08:09 06/05/23 01:44 1 Total HpCDF 1800 B G 6.6 6.6 pg/g 05/18/23 08:09 06/05/23 01:44 1 OCDF 610 F1 B 9.7 0.77 pg/g 05/18/23 08:09 06/05/23 01:44 1 Isotope Dilution %Recovery Qualifier Limits Prepared Analyzed Dil Fac 13C-2, 3, 7, 8-TCDD 75 40 -135 05/18/23 08:09 06105123 01:44 1 13C-1,2,3,7,8-PeCDD 69 40-135 05/18/23 08:09 06105123 01:44 1 13C-1, 2, 3, 6, 7, 8-HxCDD 70 40 -135 05/18/23 08:09 06/05/23 01:44 1 13C-1, 2, 3, 4, 6, 7, 8-HpCDD 76 40 -135 05118123 08:09 06105123 01:44 1 13C-OCDD 78 40-135 05/18/23 08:09 06/05/23 01:44 1 13C-2, 3, 7, 8-TCDF 81 40 -135 05/18/23 08:09 06/05/23 01:44 1 13C-1,2,3,7,8-PeCDF 83 40- 135 05118123 08:09 06/05/23 01:44 1 13C-1,2,3,4,7,8-HxCDF 86 40-135 05118123 08:09 06/05/23 01:44 1 13C-1,2,3,4,6,7,8-HpCDF 72 40-135 05118123 08:09 06/05/23 01:44 1 13C-OCDF 85 40 -135 05118123 08:09 06/05/23 01:44 1 13C-1, 2, 3, 7, 8, 9-HxCDF 93 40 -135 05/18/23 08:09 06105123 01:44 1 13C-1, 2, 3, 4, 7, 8-HxCDD 70 40 -135 05118123 08:09 06105123 01: 44 1 13C-1, 2, 3, 6, 7, 8-HxCDF 83 40 -135 05118123 08:09 06105123 01:44 1 13C-2, 3, 4, 7, 8-PeCDF 77 40 -135 05118123 08:09 06/05/23 01:44 1 13C-2, 3, 4, 6, 7, 8-HxCDF 93 40 -135 05118123 08:09 06105123 01:44 1 13C-1, 2, 3, 4, 7, 8, 9-HpCDF 83 40 -135 05/18/23 08:09 06105123 01:44 1 Client Sample ID: DU03-230505-0.5-Rep1 Date Collected: 05/05/23 11:20 Date Received: 05/09/23 09:15 Analyte Result Qualifier 2,3,7,8-TCDD 14 Total TCDD 110 q 1,2,3,7,8-PeCDD 46 q Total PeCDD 260 q 1,2,3,4,7,8-HxCDD 15 B G 1,2,3,6,7,8-HxCDD 460 G 1,2,3,7,8,9-HxCDD 210 G Total HxCDD 2500 B G 1,2,3,4,6,7,8-HpCDD 990 B G Total HpCDD 1500 B G OCDD 960 B Total TCDF 11 q 1,2,3,7,8-PeCDF 1.9 J B 2,3,4,7,8-PeCDF 2.8 J B Total PeCDF 36 B q 1,2,3,4,7,8-HxCDF 8.8 B 1,2,3,6,7,8-HxCDF 12 B 2,3,4,6,7,8-HxCDF 10 B 1,2,3,7,8,9-HxCDF ND Lab Sample ID: 280-176200-22 Matrix: Solid RL EDL Unit D Prepared Analyzed Dil Fac 0.98 0.14 pg/g 05/18/23 08:09 06/05/23 04:07 1 0.98 0.14 pg/g 05/18/23 08:09 06/05/23 04:07 1 4.9 0.51 pg/g 05/18/23 08:09 06/05/23 04:07 1 4.9 0.51 pg/g 05/18/23 08:09 06/05/23 04:07 1 9.3 9.3 pg/g 05/18/23 08:09 06/05/23 04:07 1 8.6 8.6 pg/g 05/18/23 08:09 06/05/23 04:07 1 8.5 8.5 pg/g 05/18/23 08:09 06/05/23 04:07 1 8.8 8.8 pg/g 05/18/23 08:09 06/05/23 04:07 1 11 11 pg/g 05/18/23 08:09 06/05/23 04:07 1 11 11 pg/g 05/18/23 08:09 06/05/23 04:07 1 9.8 1.2 pg/g 05/18/23 08:09 06/05/23 04:07 1 0.98 0.11 pg/g 05/18/23 08:09 06/05/23 04:07 1 4.9 0.24 pg/g 05/18/23 08:09 06/05/23 04:07 1 4.9 0.28 pg/g 05/18/23 08:09 06/05/23 04:07 1 4.9 0.26 pg/g 05/18/23 08:09 06/05/23 04:07 1 4.9 2.3 pg/g 05/18/23 08:09 06/05/23 04:07 1 4.9 2.1 pg/g 05/18/23 08:09 06/05/23 04:07 1 4.9 1.7 pg/g 05/18/23 08:09 06/05/23 04:07 1 4.9 1.9 pg/g 05/18/23 08:09 06/05/23 04:07 1 Eurofins Denver Page 19 of 51 6/7/2023 Client Sample Results Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon _............ . - Method: SW846 8290A - Dioxins and Furans (HRGC/HRMS) (Contin Client Sample ID: DU03-230505-0.5-Repl Date Collected: 05/05/23 11:20 Date Received: 05/09/23 09:15 Analyte Result Qualifier Total HxCDF 700 B 1,2,3,4,6,7,8-HpCDF 900 B G 1,2,3,4,7,8,9-HpCDF 15 B G Total HpCDF 2500 B G OCDF 830 B Isotope Dilution %Recovery Qualifier 13C-2, 3, 7, 8-TCDD 69 13C-1, 2, 3, 7, 8-PeCDD 67 13C-1,2, 3, 6, 7, 8-HxCDD 65 13C-1, 2, 3, 4, 6, 7, 8-HpCDD 71 13C-OCDD 74 13C-2,3,7,8-TCDF 74 13C-1,2,3,7,8-PeCDF 73 13C-1,2, 3, 4, 7, 8-HxCDF 75 13C-1, 2, 3, 4, 6, 7, 8-HpCDF 68 13C-OCDF 83 13C-1, 2, 3, 7, 8, 9-HxCDF 84 13C-1, 2, 3,4, 7, 8-HxCDD 63 13C-1, 2, 3, 6, 7, 8-HxCDF 74 13C-2, 3, 4, 7, 8-PeCDF 69 13C-2,3, 4, 6, 7, 8-HxCDF 85 13C-1,2, 3, 4, 7, 8, 9-HpCDF 79 Client Sample ID: DU03-230505-0.5-Rep2 li Date Collected: 05/05/23 11:25 Date Received: 05/09/23 09:15 Job ID: 280-176200-2 Lab Sample ID: 280-176200-22 Matrix: Solid RL EDL Unit D Prepared Analyzed Dil Fac 4.9 2.0 pg/g 05/18/23 08:09 06/05/23 04:07 1 7.7 7.7 pg/g 05/18/23 08:09 06/05/23 04:07 1 7.7 7.7 pg/g 05/18/23 08:09 06/05/23 04:07 1 7.7 7.7 pg/g 05/18/23 08:09 06/05/23 04:07 1 9.8 0.86 pg/g 05/18/23 08:09 06/05/23 04:07 1 Limits 40-135 40-135 40-135 40-135 40 -135 40 -135 40 -135 40-135 40-135 40-135 40-135 40 -135 40 -135 40 -135 40-135 40-135 Prepared Analyzed 05/18/23 08:09 06105123 04:07 05/18/23 08:09 06105123 04:07 05/18/23 08:09 06105123 04:07 05118123 08:09 06/05/23 04:07 05118123 08:09 06105123 04:07 05118123 08:09 06105123 04:07 05118123 08:09 06/05/23 04:07 05118123 08:09 06105123 04:07 05118123 08:09 06105123 04.07 05/18/23 08:09 06/05/23 04:07 05/18/23 08:09 06105123 04:07 05118123 08:09 06105123 04:07 05118123 08:09 06105123 04:07 05118123 08.09 06/05/23 04:07 05/18/23 08:09 06/05/23 04:07 05/18/23 08:09 06105123 04:07 Dil Fac 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Lab Sample ID: 280-176200-23 Matrix: Solid Analyte Result Qualifier RL EDL Unit D Prepared Analyzed Dil Fac 2,3,7,8-TCDD 2.1 q 0.94 0.072 pg/g 05/18/23 08:09 06/05/23 04:55 1 Total TCDD 19 q 0.94 0.072 pg/g 05/18/23 08:09 06/05/23 04:55 1 1,2,3,7,8-PeCDD 7.5 q 4.7 0.15 pg/g 05/18/23 08:09 06/05/23 04:55 1 Total PeCDD 46 q 4.7 0.15 pg/g 05/18/23 08:09 06/05/23 04:55 1 1,2,3,4,7,8-HxCDD 2.5 J B 4.7 1.7 pg/g 05/18/23 08:09 06/05/23 04:55 1 1,2,3,6,7,8-HxCDD 74 4.7 1.6 pg/g 05/18/23 08:09 06/05/23 04:55 1 1,2,3,7,8,9-HxCDD 33 4.7 1.6 pg/g 05/18/23 08:09 06/05/23 04:55 1 Total HxCDD 400 B 4.7 1.6 pg/g 05/18/23 08:09 06/05/23 04:55 1 1,2,3,4,6,7,8-HpCDD 170 B 4.7 2.0 p9/g 05/18/23 08:09 06/05/23 04:55 1 Total HpCDD 260 B 4.7 2.0 pg/g 05/18/23 08:09 06/05/23 04:55 1 OCDD 250 B 9.4 0.37 pg/g 05/18/23 08:09 06/05/23 04:55 1 Total TCDF 3.8 q 0.94 0.069 pg/g 05/18/23 08:09 06/05/23 04:55 1 1,2,3,7,8-PeCDF 0.32 J B q 4.7 0.10 pg/g 05/18/23 08:09 06/05/23 04:55 1 2,3,4,7,8-PeCDF 0.69 J B q 4.7 0.12 pg/g 05/18/23 08:09 06/05/23 04:55 1 Total PeCDF 11 B q 4.7 0.11 pg/g 05/18/23 08:09 06/05/23 04:55 1 1,2,3,4,7,8-HxCDF 1.9 J B 4.7 0.40 pg/g 05/18/23 08:09 06/05/23 04:55 1 1,2,3,6,7,8-HxCDF 2.2 J B 4.7 0.36 pg/g 05/18/23 08:09 06/05/23 04:55 1 2,3,4,6,7,8-HxCDF 1.9 J B q 4.7 0.31 pg/g 05/18/23 08:09 06/05/23 04:55 1 1,2,3,7,8,9-HxCDF ND 4.7 0.35 pg/g 05/18/23 08:09 06/05/23 04:55 1 Total HxCDF 120 B q 4.7 0.36 pg/g 05/18/23 08:09 06/05/23 04:55 1 1,2,3,4,6,7,8-HpCDF 140 B 4.7 1.3 pg/g 05/18/23 08:09 06/05/23 04:55 1 1,2,3,4,7,8,9-HpCDF 2.5 J B 4.7 1.3 pg/g 05/18/23 08:09 06/05/23 04:55 1 Eurofins Denver a Page 20 of 51 6/7/2023 Client Sample Results Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Method: SW846 8290A - Dioxins and Furans (HRGC/HRMS) (Continued) Client Sample ID: DU03-230505-0.5-Rep2 Date Collected: 05/05/23 11:25 Date Received: 05/09/23 09:15 Job ID: 280-176200-2 Lab Sample ID: 280-176200-23 Matrix: Solid Analyte Result Qualifier RL EDL Unit D Prepared Analyzed Total HpCDF 380 B 4.7 1.3 pg/g 05/18/23 08:09 06/05/23 04:55 OCDF 140 B 9.4 0.19 pg/g 05/18/23 08:09 06/05/23 04:55 Isotope Dilution %Recovery Qualifier Limits Prepared Analyzed 13C-2, 3, 7, 8-TCDD 72 40 -135 05118123 08:09 06105123 04:55 13C-1,2,3,7,8-PeCDD 68 40-135 05118123 08:09 06/05/23 04:55 13C-1, 2, 3, 6, 7, 8-HxCDD 69 40 -135 05118123 08:09 06105123 04:55 13C-1, 2, 3, 4, 6, 7, 8-HpCDD 70 40 -135 05118123 08:09 06/05/23 04:55 13C-OCDD 71 40 -135 05/18/23 08:09 06/05/23 04:55 13C-2, 3, 7, 8-TCDF 76 40 -135 05118123 08:09 06/05/23 04:55 13C-1,2,3,7,8-PeCDF 76 40-135 05/18/23 08:09 06/05/23 04:55 13C-1, 2, 3, 4, 7, 8-HxCDF 80 40 -135 05/18/23 08:09 06105123 04:55 13C-1,2,3,4,6,7,8-HpCDF 69 40-135 05/18/23 08:09 06105123 04:55 13C-OCDF 81 40 -135 05118123 08:09 06105123 04:55 13C-1,2,3,7,8,9-HxCDF 85 40-135 05118123 08:09 06105123 04:55 13C-1, 2, 3, 4, 7, 8-HxCDD 68 40 -135 05118123 08:09 06105123 04:55 13C-1,2,3,6,7,8-HxCDF 79 40-135 05118123 08:09 06105123 04:55 13C-2,3,4, 7,8-PeCDF 72 40-135 05118123 08:09 06/05/23 04:55 13C-2, 3, 4, 6, 7, 8-HxCDF 87 40 -135 05118123 08:09 06105123 04:55 13C-1, 2, 3, 4, 7, 8, 9-HpCDF 79 40 -135 05118123 08:09 06/05/23 04:55 Method: SW846 8290A - Dioxins and Furans (HRGC/HRMS) - RA Client Sample ID: DU01-230504-0.5 Date Collected: 05/04/23 16:15 Date Received: 05/09/23 09:15 Analyte Result Qualifier 2,3,7,8-TCDF 2.7 Isotope Dilution %Recovery Qualifier 13C-2, 3, 7, 8-TCDF 69 Client Sample ID: DU01-230504-0.5-Repl Date Collected: 05/04/23 16:25 Date Received: 05/09/23 09:15 Analyte Result Qualifier 2,3,7,8-TCDF 3.6 Isotope Dilution %Recovery Qualifier 13C-2,3, 7,8-TCDF 77 Client Sample ID: DU01-230504-0.5-Rep2 Date Collected: 05/04/23 16:35 Date Received: 05/09/23 09:15 Analyte Result Qualifier 2,3,7,8-TCDF 2.5 Isotope Dilution %Recovery Qualifier 13C-2, 3, 7, 8-TCDF 55 Dil Fac 1 1 Dil Fac 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Lab Sample ID: 280-176200-15 Matrix: Solid RL EDL Unit D Prepared Analyzed Dil Fac 0.99 0.099 pg/g 05/18/23 08:09 06/06/23 17:04 1 Limits Prepared Analyzed Dil Fac 40 -135 05118123 08:09 06106123 17:04 1 Lab Sample ID: 280-176200-16 Matrix: Solid RL EDL Unit D Prepared Analyzed Dil Fac 0.98 0.087 pg/g 05/18/23 08:09 06/06/23 17:47 1 Limits Prepared Analyzed Dil Fac 40 -135 05118123 08:09 06/06/23 17:47 1 Lab Sample ID: 280-176200-17 Matrix: Solid RL EDL Unit D Prepared Analyzed Dil Fac 0.97 0.10 pg/g 05/18/23 08:09 06/06/23 18:30 1 Limits Prepared Analyzed Dil Fac 40 -135 05118123 08:09 06106123 18:30 1 Eurofins Denver Page 21 of 51 6/7/2023 Client Sample Results Client: SCS Engineers Job ID: 280-176200-2 Project/Site: Croman Mill Site, Ashland, Oregon Method: SW846 8290A -Dioxins and Furans (HRGC/HRMS) - RA Client Sample ID: DU02-230504-0.5 Lab Sample ID: 280-176200-18 Date Collected: 05/04/23 17:00 Matrix: Solid Date Received: 05/09/23 09:15 Analyte Result Qualifier RL EDL Unit D Prepared Analyzed DII Fac 2,3,7,8-TCDF 2.7 0.98 0.11 pg/g 05/18/23 08:09 06/06/23 19:13 1 Isotope Dilution %Recovery Qualiffer Limits Prepared Analyzed Dil Fac 13C-2,3,7,8-TCDF 80 40-135 05/18/23 08:09 06/06/23 19:13 1 Client Sample ID: DU03-230505-0.5 Lab Sample ID: 280-176200-21 Date Collected: 05/05/23 11:15 Matrix: Solid Date Received: 05/09/23 09:15 Analyte Result Qualifier RL EDL Unit D Prepared Analyzed Dill Fac 2,3,7,8-TCDF 1.9 0.97 0.11 pg/g 05/18/23 08:09 06/06/23 19:57 1 Isotope Dilution %Recovery Qualifier Limits Prepared Analyzed Dil Fac 13C-2, 3, 7, 8-TCDF 84 40 -135 05/18/23 08:09 0610623 19:57 1 Client Sample ID: DU03-230505-0.5-Rep1 Lab Sample ID: 280-176200-22 Date Collected: 05/05/23 11:20 Matrix: Solid Date Received: 05/09/23 09:15 Analyte Result Qualifier RL EDL Unit D Prepared Analyzed Dil Fac 2,3,7,8-TCDF 2.6 0.98 0.19 pg/g 05/18/23 08:09 06/06/23 22:06 1 Isotope Dilution %Recovery Qualifier Limits Prepared Analyzed Dil Fac 13C-2, 3, 7, 8-TCDF 88 40 -135 0511823 08:09 06IV623 22:06 1 Client Sample ID: DU03-230505-0.5-Rep2 Lab Sample ID: 280-176200-23 Date Collected: 05/05/23 11:25 Matrix: Solid Date Received: 05/09/23 09:15 Analyte Result Qualifier RL EDL Unit D Prepared Analyzed Dil Fac 2,3,7,8-TCDF ND 0.94 0.15 pg/g 05/18/23 08:09 06/06/23 22:49 1 Isotope Dilution %Recovery Qualifier Limits Prepared Analyzed Dil Fac 13C-2, 3, 7, 8-TCDF 72 q 40 -135 05/1823 08:09 OM6123 22:49 1 General Chemistry _ -- Client Sample ID: DU01-230504-0.5 Lab Sample ID: 280-176200-15 Date Collected: 05/04/23 16:15 Matrix: Solid Date Received: 05/09/23 09:15 Ana" Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Incremented sample generated True NONE 05/10/23 14:50 1 (EPA Increment, prep) Client Sample ID: DU01-230504-0.5-Rep1 Lab Sample ID: 280-176200-16 Date Collected: 05/04/23 16:25 Matrix: Solid Date Received: 05/09/23 09:15 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Incremented sample generated True NONE 05/10/23 14:50 1 (EPA Increment, prep) Client Sample ID: DU01-230504-0.5-Rep2 Lab Sample ID: 280-176200-17 Date Collected: 05/04/23 16:35 Matrix: Solid Date Received: 05/09/23 09:15 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Incremented sample generated True NONE— 05/10/23 14:50 1 (EPA Increment, prep) Eurofins Denver Page 22 of 51 6/7/2023 Client Sample Results Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon General Chemistry Client Sample ID: DU02-230504-0.5 Date Collected: 05/04/23 17:00 Date Received: 05/09/23 09:15 Analyte Result Qualifier Incremented sample generated True JEPA Increment, prep) Client Sample ID: DU03-230505-0.5 Date Collected: 05/05/23 11:15 Date Received: 05/09/23 09:15 Analyte Result Qualifier Incremented sample generated True (EPA Increment, prep) Client Sample ID: DU03-230505-0.5-Rep1 Date Collected: 05/05/23 11:20 Date Received: 05/09/23 09:15 Analyte Result Qualifier Incremented sample generated True (EPA Increment, prep) Client Sample ID: DU03-230505-0.5-Rep2 Date Collected: 05/05/23 11:25 Date Received: 05/09/23 09:15 Analyte Result Qualifier Incremented sample generated True (EPA Increment, prep) Job ID: 280-176200-2 Lab Sample ID: 280-176200-18 Matrix: Solid RL MDL Unit D Prepared Analyzed DII Fac NONE 05/10/23 14:50 1 Lab Sample ID: 280-176200-21 Matrix: Solid RL MDL Unit D Prepared Analyzed DII Fac NONE 05/10/23 14:50 1 Lab Sample ID: 280-176200-22 Matrix: Solid RL MDL Unit D Prepared Analyzed Dil Fac NONE 05/10/23 14:50 1 Lab Sample ID: 280-176200-23 Matrix: Solid RL MDL Unit D Prepared Analyzed Dil Fac NONE 05/10/23 14:50 1 Page 23 of 51 Eurofins Denver 6/7/2023 QC Sample Results Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Job ID: 280-176200-2 Method: 8290A - Dioxins and Furans (HRGC/HRMS) Lab Sample ID: MB 320-673787/1-A Client Sample ID: Method Blank Matrix: Solid Prep Type: Total/NA Analysis Batch: 678488 Prep Batch: 673787 MB MB Analyte Result Qualifier RL EDL Unit D Prepared Analyzed Dil Fac 2,3,7,8-TCDD ND 1.0 0.048 pg/g 05/11/23 10:19 05/28/23 22:25 1 1,2,3,7,8-PeCDD ND 5.0 0.097 pg/g 05/11/23 10:19 05/28/23 22:25 1 1,2,3,4,7,8-HxCDD 0.357 J q 5.0 0.13 pg/g 05/11/23 10:19 05/28/23 22:25 1 1,2,3,6,7,8-HxCDD 0.461 J q 5.0 0.13 pg/g 05/11/23 10:19 05/28/23 22:25 1 1,2,3,7,8,9-HxCDD 0.317 J q 5.0 0.11 pg/g 05/11/23 10:19 05/28/23 22:25 1 2,3,7,8-TCDF ND 1.0 0.0074 pg/g 05/11/23 10:19 05/28/23 22:25 1 1,2,3,4,6,7,8-HpCDD 0.438 J q 5.0 0.019 pg/g 05/11/23 10:19 05/28/23 22:25 1 1,2,3,7,8-PeCDF ND 5.0 0.064 pg/g 05/11/23 10:19 05/28/23 22:25 1 2,3,4,7,8-PeCDF ND 5.0 0.074 pg/g 05/11/23 10:19 05/28/23 22:25 1 OCDD 1.12 J 10 0.072 pg/g 05/11/23 10:19 05/28/23 22:25 1 1,2,3,4,7,8-HxCDF ND 5.0 0.081 pg/g 05/11/23 10:19 05/28/23 22:25 1 1,2,3,6,7,8-HxCDF ND 5.0 0.071 pg/g 05/11/23 10:19 05/28/23 22:25 1 Total TCDD ND 1.0 0.050 pg/g 05/11/23 10:19 05/28/23 22:25 1 2,3,4,6,7,8-HxCDF 0.334 J 5.0 0.070 pg/g 05/11/23 10:19 05/28/23 22:25 1 Total TCDF ND 1.0 0.0074 pg/g 05/11/23 10:19 05/28/23 22:25 1 1,2,3,7,8,9-HxCDF ND 5.0 0.081 pg/g 05/11/23 10:19 05/28/23 22:25 1 Total PeCDD ND 5.0 0.097 pg/g 05/11/23 10:19 05/28/23 22:25 1 Total PeCDF ND 5.0 0.074 pg/g 05/11/23 10:19 05/28/23 22:25 1 1,2,3,4,6,7,8-HpCDF 0.347 J q 5.0 0.12 pg/g 05/11/23 10:19 05/28/23 22:25 1 Total HxCDD 1.13 J q 5.0 0.12 pg/g 05/11/23 10:19 05/28/23 22:25 1 1,2,3,4,7,8,9-HpCDF 0.457 J q 5.0 0.13 pg/g 05/11/23 10:19 05/28/23 22:25 1 Total HxCDF 0.334 J 5.0 0.076 pg/g 05/11/23 10:19 05/28/23 22:25 1 Total HpCDD 0.438 J q 5.0 0.019 pg/g 05/11/23 10:19 05/28/23 22:25 1 OCDF 0.879 J 10 0.080 pg/g 05/11/23 10:19 05/28/23 22:25 1 Total HpCDF 0.804 J q 5.0 0.12 pg/g 05/11/23 10:19 05/28/23 22:25 1 MB MB Isotope Dilution %Recovery Qualifier Limits Prepared AnaWed Dil Fac 13C-2,3, 7,8-TCDD 66 40-135 05/11/23 10:19 05128123 22:25 1 13C-1,2,3,7,8-PeCDD 68 40-135 05111123 10:19 05128123 22:25 1 13C-1,2,3,6,7,8-HxCDD 70 40-135 05/11/23 10:19 05/28/23 22:25 1 13C-2, 3, 7, 8-TCDF 53 407135 05111123 10.19 05/28/23 22:25 1 13C-1, 2, 3, 7, 8-PeCDF 69 40 -135 05111123 10:19 05128123 22:25 1 13C-1,2,3,4,6,7,8-HpCDD 76 40-135 05111123 10:19 05128123 22:25 1 13C-1,2,3,4,7,8-HxCDF 60 40-135 05111123 10:19 05/28/23 22:25 1 13C-1,2,3,4,6,7,8-HpCDF 68 40-135 05/11/23 10:19 05128123 22:25 1 13C-OCDD 71 40 -135 05111123 10.19 05/28/23 22:25 1 13C-OCDF 61 40 -135 05111123 10:19 05/28/23 22:25 1 13C-1, 2, 3, 7, 8, 9-HxCDF 56 40 -135 05/11/23 10:19 05128123 22: 25 1 13C-1, 2, 3, 4, 7, 8-HxCDD 70 40 -135 05/11/23 10:19 05/28/23 22:25 1 13C-1,2,3,6,7,8-HxCDF 71 40-135 05111123 10:19 05128123 22:25 1 13C-2, 3, 4, 7, 8-PeCDF 64 40 -135 05111123 10:19 05128123 22:25 1 13C-2, 3, 4, 6, 7, 8-HxCDF 66 40 -135 05111123 10:19 05128123 22:25 1 13C-1,2,3,4,7,8,9-HpCDF 66 40-135 05111123 10:19 05128123 22:25 1 Eurofins Denver Page 24 of 51 6/7/2023 QC Sample Results Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Job ID: 280-176200-2 Method: 8290A - Dioxins and Furans (HRGC/HRMS) (Continued) Lab Sample ID: LCS 320-673787/2-A Client Sample ID: Lab Control Sample Matrix: Solid Prep Type: Total/NA Analysis Batch: 678488 Prep Batch: 673787 Spike LCS LCS %Rec Analyte Added Result Qualifier Unit D %Rec Limits 2,3,7,8-TCDD 20.0 17.7 pg/g 89 73 -141 1,2,3,7,8-PeCDD 100 91.6 pg/g 92 77-126 1,2,3,4,7,8-HxCDD 100 90.3 pg/g 90 73-126 1,2,3,6,7,8-HxCDD 100 96.5 pg/g 97 76-142 1,2,3,7,8,9-HxCDD 100 99.2 pg/g 99 70-136 2,3,7,8-TCDF 20.0 19.2 pg/g 96 71 -153 1,2,3,4,6,7,8-HpCDD 100 92.5 pg/g 93 79-121 1,2,3,7,8-PeCDF 100 88.0 pg/g 88 72-128 2,3,4,7,8-PeCDF 100 91.7 pg/g 92 72-127 OCDD 200 178 pg/g 89 76 -136 1,2,3,4,7,8-HxCDF 100 95.9 pg/g 96 73 -127 1,2,3,6,7,8-HxCDF 100 91.6 pg/g 92 77-126 2,3,4,6,7,8-HxCDF 100 95.2 pg/g 95 77-126 1,2,3,7,8,9-HxCDF 100 90.6 pg/g 91 77-125 1,2,3,4,6,7,8-HpCDF 100 93.8 pg/g 94 78 -138 1,2,3,4,7,8,9-HpCDF 100 91.6 pg/g 92 76-123 OCDF 200 184 pg/g 92 75 -130 LCS LCS Isotope Dilution %Recovery Qualifier Limits 13C-2, 3, 7, 8-TCDD 58 40 -135 13C-1, 2, 3, 7, 8-PeCDD 68 40 -135 13C-1,2,3,6,7,8-HxCDD 61 40-135 13C-2, 3, 7, 8-TCDF 49 40 -135 13C-1,2,3,7,8-PeCDF 61 40-135 13C-1,2,3,4,6,7,8-HpCDD 72 40-135 13C-1,2,3,4,7,8-HxCDF 52 40-135 13C-1,2,3,4,6,7,8-HpCDF 59 40-135 13C-OCDD 69 40-135 13C-OCDF 60 40- 135 13C-1,2,3,7,8,9-HxCDF 57 40- 135 13C-1,2,3,4,7,8-HxCDD 60 40- 135 13C-1,2,3,6,7,8-HxCDF 63 40- 135 13C-2, 3, 4, 7, 8-PeCDF 52 40 - 135 13C-2, 3, 4, 6, 7, 8-HxCDF 64 40 - 135 13C-1,2,3,4,7,8,9-HpCDF 62 40- 135 Lab Sample ID: LCSD 320-673787/3-A Client Sample ID: Lab Control Sample Dup Matrix: Solid Prep Type: Total/NA Analysis Batch: 678488 Prep Batch: 673787 Spike LCSD LCSD %Rec RPD Analyte Added Result Qualifier Unit D %Rec Limits RPD Limit 2,3,7,8-TCDD 20.0 17.3 pg/g 86 73-141 3 20 1,2,3,7,8-PeCDD 100 91.5 pg/g 91 77 -126 0 20 1,2,3,4,7,8-HxCDD 100 91.4 pg/g 91 73 -126 1 20 1,2,3,6,7,8-HxCDD 100 95.3 pg/g 95 76-142 1 20 1,2,3,7,8,9-HxCDD 100 86.6 pg/g 87 70-136 14 20 2,3,7,8-TCDF 20.0 20.3 pg/g 102 71 -153 6 20 1,2,3,4,6,7,8-HpCDD 100 93.0 pg/g 93 79-121 0 20 1,2,3,7,8-PeCDF 100 94.3 pg/g 94 72 -128 7 20 Eurofins Denver Page 25 of 51 6/7/2023 QC Sample Results Client: SCS Engineers Job ID: 280-176200-2 Project/Site: Croman Mill Site, Ashland, Oregon Method: 8290A - Dioxins and Furans (HRGC/HRMS) (Continued) Lab Sample ID: LCSD 320-673787/3-A Client Sample ID: Lab Control Sample Dup Matrix: Solid Prep Type: Total/NA Analysis Batch: 678488 Prep Batch: 673787 Spike LCSD LCSD %Rec RPD Analyte Added Result Qualifier Unit D %Rec Limits RPD Limit 2,3,4,7,8-PeCDF 100 92.3 pg/g 92 72-127 1 20 OCDD 200 186 pg/g 93 76 -136 4 20 1,2,3,4,7,8-HxCDF 100 96.1 pg/g 96 73 -127 0 20 1,2,3,6,7,8-HxCDF 100 97.4 pg/g 97 77-126 6 20 2,3,4,6,7,8-HxCDF 100 91.3 pg/g 91 77-126 4 20 1,2,3,T8,9-HxCDF 100 95.3 pg/g 95 77-125 5 20 1,2,3,4,6,7,8-HpCDF 100 97.1 pg/g 97 78-138 3 20 1,2,3,4,7,8,9-HpCDF 100 93.7 pg/g 94 • 76-123 2 20 OCDF 200 187 pg/g 93 75 -130 2 20 LCSD LCSD Isotope Dilution %Recovery Qualifier Limits 13C-2, 3, 7, 8-TCDD 58 40 - 135 13C-1,2,3,7,8-PeCDD 75 40- 135 13C-1,2,3,6,7,8-HxCDD 65 40- 135 13C-2,3,7,8-TCDF 49 40- 135 13C-1,2,3,7,8-PeCDF 62 40- 135 13C-1,2,3,4,6,7,8-HpCDD 70 40-135 13C-1,2,3,4,7,8-HxCDF 53 40- 135 13C-1, 2, 3,4, 6, 7, 8-HpCDF 58 40 -135 13C-OCDD 65 40 -135 13C-OCDF 55 40 - 135 13C-1,2,3,7,8,9-HxCDF 52 40- 135 13C-1,2,3,4,7,8-HxCDD 63 40- 135 13C-1,2,3,6,7,8-HxCDF 61 40- 135 13C-2, 3, 4, 7, 8-PeCDF 60 40 - 135 13C-2,3,4,6,7,8-HxCDF 61 40- 135 13C-1,2,3,4,7,8,9-HpCDF 59 40- 135 .FLab Sample ID: 280-175901-B-1-B MS Client Sample ID: Matrix Spike Matrix: Solid Prep Type: Total/NA Analysis Batch: 678489 Prep Batch: 673787 Sample Sample Spike MS MS %Rec Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits 2,3,7,8-TCDD ND 19.9 18.5 pg/g 93 73-141 1,2,3,7,8-PeCDD ND 99.5 93.3 pg/g 94 77-126 1,2,3,4,7,8-HxCDD 0.27 J B q 99.5 95.0 pg/g 95 73- 126 1,2,3,6,7,8-HxCDD ND 99.5 94.7 pg/g 95 76-142 1,2,3,7,8,9-HxCDD ND 99.5 97.4 pg/g 98 70-136 2,3,7,8-TCDF ND 19.9 20.9 pg/g 105 71 -153 1,2,3,4,6,7,8-HpCDD 0.84 JB 99.5 95.3 pg/g 95 79-121 1,2,3,7,8-PeCDF ND 99.5 91.8 pg/g 92 72 -128 2,3,4,7,8-PeCDF ND 99.5 91.5 pg/g 92 72 -127 OCDD 4.6 J B 199 186 pg/g 91 76 -136 1,2,3,4,7,8-HxCDF ND 99.5 97.8 pg/g 98 73-127 1,2,3,6,7,8-HxCDF 0.10 J q 99.5 97.1 pg/g 98 77-126 2,3,4,6,7,8-HxCDF 0.18 J B q 99.5 95.2 pg/g 96 77 -126 1,2,3,7,8,9-HxCDF 0.31 J 99.5 96.9 pg/g 97 77-125 1,2,3,4,6,7,8-HpCDF 0.69 J B q 99.5 95.0 pg/g 95 78-138 1,2,3,4,7,8,9-HpCDF 0.37 J B q 99.5 93.4 pg/g 93 76-123 Eurofins Denver Page 26 of 51 6/7/2023 QC Sample Results Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Method: 8290A - Dioxins and Furans (HRGC/HRMS) (Continued) Lab Sample ID: 280-175901-B-1-B MS Matrix: Solid Analysis Batch: 678489 Sample Sample Analyte Result Qualifier OCDF 2.2 J B MS MS Isotope Dilution %Recovery Qualifier 13C-2, 3, 7, 8-TCDD 56 13C-1, 2, 3, 7, 8-PeCDD 66 13C-1, 2, 3, 6, 7, 8-HxCDD 49 13C-2,3, 7, 8-TCDF 44 13C-1, 2, 3, 7, 8-PeCDF 58 13C-1, 2, 3, 4, 6, 7, 8-HpCDD 53 13C-1,2,3,4,7,8-HxCDF 39 *5- 13C-1, 2, 3, 4, 6, 7, 8-HpCDF 40 13C-OCDD 43 13C-OCDF 37 *5- 13C-1, 2, 3, 7, 8, 9-HxCDF 44 13C-1, 2, 3, 4, 7, 8-HxCDD 47 13C-1, 2, 3, 6, 7, 8-HxCDF 45 13C-2, 3, 4, 7, 8-PeCDF 51 13C-2, 3, 4, 6, 7, 8-HxCDF 50 13C-1, 2, 3, 4, 7, 8, 9-HpCDF 46 Lab Sample ID: 280-175901-B-1-C MSD Matrix: Solid Analysis Batch: 678489 Analyte 2,3,7,8-TCDD 1,2,3,7,8-PeCDD 1,2,3,4,7,8-HxCDD 1,2,3,6,7,8-HxCDD 1,2,3,7,8,9-HxCDD 2,3,7,8-TCDF 1,2,3,4,6,7,8-HpCDD 1,2,3,7,8-PeCDF 2,3,4,7,8-PeCDF OCDD 1,2,3,4,7,8-HxCDF 1,2,3,6,7,8-HxCDF 2,3,4,6,7,8-HxCDF 1,2,3,7,8,9-HxCDF 1,2,3,4,6,7,8-HpCDF 1,2,3,4,7,8,9-HpCDF OCDF Isotope Dilution 13C-2, 3, 7, 8-TCDD 13C-1, 2, 3, 7, 8-PeCDD 13C-1, 2, 3, 6, 7, 8-HxCDD 13C-2,3, 7, 8-TCDF 13C-1, 2, 3, 7, 8-PeCDF Sample Sample Result Qualifier ND ND 0.27 J B q ND ND ND 0.84 J B ND ND 4.6 J B ND 0.10 J q 0.18 J B q 0.31 J 0.69 J B q 0.37 J B q 2.2 J B MSD MSD %Recovery Qualifier 62 69 62 52 64 Spike Added 199 Limits 40-135 40 -135 40-135 40 - 135 40 - 135 40 - 135 40 - 135 40 - 135 40 - 135 40 - 135 40 - 135 40 - 135 40 - 135 40 - 135 40-135 40-135 Spike Added 19.7 98.5 98.5 98.5 98.5 19.7 98.5 98.5 98.5 197 98.5 98.5 98.5 98.5 98.5 98.5 197 Limits 40-135 40 - 135 40-135 40-135 40-135 MS MS Result Qualifier Unit 194 pg/g MSD MSD Result Qualifier 17.2 93.8 89.4 90.0 88.7 19.7 91.9 92.7 94.3 175 91.3 93.3 93.5 96.0 94.9 92.7 186 Job ID: 280-176200-2 Client Sample ID: Matrix Spike Prep Type: Total/NA Prep Batch: 673787 %Rec D %Rec Limits 96 75 -130 Client Sample ID: Matrix Spike Duplicate Prep Type: Total/NA Prep Batch: 673787 %Rec RPD Unit D %Rec Limits RPD Limit pg/g 87 73-141 7 20 pg/g 95 77-126 1 20 pg/g 90 73 -126 6 20 pg/g 91 76 -142 5 20 pg/g 90 70 -136 9 20 pg/g 100 71 - 153 6 20 Pg/g 92 79 -121 4 20 Pg/g 94 72 -128 1 20 Pg/g 96 72 - 127 3 20 pg/g 86 76-136 6 20 pg/g 93 73-127 7 20 pg/g 95 77 -126 4 20 pg/g 95 77-126 2 20 pg/g 97 77-125 1 20 pg/g 96 78-138 0 20 Pg/g 94 76 -123 1 20 pg/g 93 75 -130 4 20 Eurofins Denver 0 Page 27 of 51 6/7/2023 QC Sample Results Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Job ID: 280-176200-2 Method: 8290A - Dioxins and Furans (HRGC/HRMS) (Continued) Lab Sample ID: 280-175901-B-1-C MSD Matrix: Solid Analysis Batch: 678489 Isotope Dilution MSD MSD %Recovery Qualifier 13G1, 2, 3,4, 6, 7, 8-HpCDD 61 13C-1, 2, 3, 4, 7, 8-HxCDF 50 13C-1, 2, 3, 4, 6, 7, 8-HpCDF 49 13C-OCDD 54 13C-OCDF 46 13C-1, 2, 3, 7, 8, 9-HxCDF 49 13C-1, 2, 3, 4, 7, 8-HxCDD 58 13C-1, 2, 3, 6, 7, 8-HxCDF 56 13C-2, 3, 4, 7, 8-PeCDF 57 13C-2, 3, 4, 6, 7, 8-HxCDF 57 13C-1, 2, 3, 4, 7, 8, 9-HpCDF 54 Lab Sample ID: 280-175901-B-1-D DU Matrix: Solid Analysis Batch: 678489 Analyte 2,3,7,8-TCDD 1,2,3,7,8-PeCDD 1,2,3,4,7,8-HxCDD 1,2,3,6,7,8-HxCDD 1,2,3,7,8,9-HxCDD 2,3,7,8-TCDF 1,2,3,4,6,7,8-HpCDD 1,2,3,7,8-PeCDF 2,3,4,7,8-PeCDF OCDD 1,2, 3,4,7,8-HxCDF 1,2,3,6,7,8-HxCDF Total TCDD 2,3,4,6,7,8-HxCDF Total TCDF 1,2,3,7,8,9-HxCDF Total PeCDD Total PeCDF 1,2,3,4,6,7,8-HpCDF Total HxCDD 1,2,3,4,7,8,9-HpCDF Total HxCDF Total HpCDD OCDF Total HpCDF Isotope Dilution 13C-2, 3, 7, 8-TCDD 13C-1, 2, 3, 7, 8-PeCDD 13C-1, 2, 3, 6, 7, 8-HxCDD 13C-2, 3, 7, 8-TCDF 13C-1, 2, 3, 7, 8-PeCDF Sample Sample Result Qualifier ND ND 0.27 J B q ND ND ND 0.84 J B ND ND 4.6 J B ND 0.10 J q ND 0.18 J B q ND 0.31 J ND ND 0.69 J B q 0.27 J B q 0.37 J B q 0.60 J B q 1.3 J B q 2.2 J B 1.4 J B q DU DU %Recovery Qualifier 55 65 61 51 58 Client Sample ID: Matrix Spike Duplicate Prep Type: Total/NA Prep Batch: 673787 Limits 40-135 40 -135 40- 135 40 -135 40- 135 40 - 135 40 - 135 40-135 40- 135 40- 135 40- 135 DU DU Result Qualifier Unit ND pg/g ND pg/g ND pg/g ND pg/g ND pg/g ND pg/g 0.944 J pg/g ND pg/g ND pg/g 5.27 J Pg/g ND pg/g ND pg/g ND pg/g ND pg/g ND pg/g ND pg/g ND pg/g ND pg/g 0.575 J q pg/g ND pg/g 0.297 J q Pg/g ND pg/g 1.50 J pg/g 1.68 J F5 pg/g 1.33 J q pg/g Limits 40 - 135 40 - 135 40-135 40-135 40- 135 Client Sample ID: Duplicate Prep Type: Total/NA Prep Batch: 673787 RPD D RPD Limit NC 25 NC 25 NC 25 NC 25 NC 25 NC 25 12 25 NC 25 NC 25 13 25 NC 25 NC 25 NC 25 NC 25 NC 25 NC 25 NC 25 NC 25 18 25 NC 25 22 25 NC 25 18 25 26 25 8 25 Eurofins Denver 0 Page 28 of 51 6/7/2023 QC Sample Results Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Method: 8290A - Dioxins and Furans (HRGC/HRMS) (Continued) Lab Sample ID: 280-175901-B-1-D DU Matrix: Solid Analysis Batch: 678489 DU DU Isotope Dilution %Recovery Qualifier Limits ! 13C-1,2,3,4,6,7,8-HpCDD 67 40- 335 13C-1,2,3,4,7,8-HxCDF 46 40- 135 13C-1,2,3,4,6,7,8-HpCDF 51 40- 135 13C-OCDD 56 40- 135 13C-OCDF 47 40 - 135 13C-1,2,3,7,8,9-HxCDF 48 40- 135 13C-1,2,3,4,7,8-HxCDD 56 40- 135 13C-1,2,3,6,7,8-HxCDF 55 40- 135 13C-2, 3, 4, 7, 8-PeCDF 53 40 - 135 13C-2,3,4,6,7,8-HxCDF 56 40- 135 13C-1,2,3,4,7,8,9-HpCDF 56 40- 135 Lab Sample ID: MB 320-675691/1-A Matrix: Solid Analysis Batch: 680038 Analyte MB MB Result Qualifier 2,3,7,8-TCDD ND 1,2,3,7,8-PeCDD ND 1,2,3,4,7,8-HxCDD 0.328 J 1,2,3,6,7,8-HxCDD ND 1,2,3,7,8,9-HxCDD ND 2,3,7,8-TCDF ND 1,2,3,4,6,7,8-HpCDD 0.179 J q 1,2,3,7,8-PeCDF 0.0510 J 2,3,4,7,8-PeCDF 0.0301 J q OCDD 0.725 J 1,2,3,4,7,8-HxCDF 0.100 J 1,2,3,6,7,8-HxCDF 0.0783 J q Total TCDD ND 2,3,4,6,7,8-HxCDF 0.0612 J q Total TCDF ND 1,2,3,7,8,9-HxCDF 0.0993 J Total PeCDD ND Total PeCDF 0.0811 J q 1,2,3,4,6,7,8-HpCDF 0.125 J Total HxCDD 0.328 J 1,2,3,4,7,8,9-HpCDF 0.0867 J Total HxCDF 0.339 J q Total HpCDD 0.306 J q OCDF 0.403 J Total HpCDF 0.212 J MB MB Isotope Dilution %Recovery Qualifier 13C-2, 3, 7, 8-TCDD 79 13C-1, 2, 3, 7, 8-PeCDD 75 13C-1, 2, 3, 6, 7, 8-HxCDD 76 13C-2, 3, 7, 8-TCDF 88 13C-1, 2, 3, 7, 8-PeCDF 85 Job ID: 280-176200-2 Client Sample ID: Duplicate Prep Type: Total/NA Prep Batch: 673787 Client Sample ID: Method Blank Prep Type: Total/NA Prep Batch: 675691 RL EDL Unit D Prepared Analyzed Dil Fac 1.0 0.050 pg/g 05/18/23 08:09 06/04/23 20:11 1 5.0 0.030 pg/g 05/18/23 08:09 06/04/23 20:11 1 5.0 0.044 pg/g 05/18/23 08:09 06/04/23 20:11 1 5.0 0.042 pg/g 05/18/23 08:09 06/04/23 20:11 1 5.0 0.041 pg/g 05/18/23 08:09 06/04/23 20:11 1 1.0 0.026 pg/g 05/18/23 08:09 06/04/23 20:11 1 5.0 0.017 pg/g 05/18/23 08:09 06/04/23 20:11 1 5.0 0.019 pg/g 05/18/23 08:09 06/04/23 20:11 1 5.0 0.023 pg/g 05/18/23 08:09 06/04/23 20:11 1 10 0.035 pg/g 05/18/23 08:09 06/04/23 20:11 1 5.0 0.026 pg/g 05/18/23 08:09 06/04/23 20:11 1 5.0 0.023 pg/g 05/18/23 08:09 06/04/23 20:11 1 1.0 0.050 pg/g 05/18/23 08:09 06/04/23 20:11 1 5.0 0.020 pg/g 05/18/23 08:09 06/04/23 20:11 1 1.0 0.026 pg/g 05/18/23 08:09 06/04/23 20:11 1 5.0 0.023 pg/g 05/18/23 08:09 06/04/23 20:11 1 5.0 0.063 pg/g 05/18/23 08:09 06/04/23 20:11 1 5.0 0.021 pg/g 05/18/23 08:09 06/04/23 20:11 1 5.0 0.027 pg/g 05/18/23 08:09 06/04/23 20:11 1 5.0 0.042 pg/g 05/18/23 08:09 06/04/23 20:11 1 5.0 0.028 pg/g 05/18/23 08:09 06/04/23 20:11 1 5.0 0.023 pg/g 05/18/23 08:09 06/04/23 20:11 1 5.0 0.017 pg/g 05/18/23 08:09 06/04/23 20:11 1 10 0.033 pg/g 05/18/23 08:09 06/04/23 20:11 1 5.0 0.027 pg/g 05/18/23 08:09 06/04/23 20:11 1 Limits Prepared Analyzed Dil Fac 40 -135 05116123 06:09 06104123 20:11 1 40 -135 05118123 08:09 06104123 20:11 1 40 -135 05118123 08:09 06104123 20:11 1 40 -135 05118123 08:09 06104123 20:11 1 40 -135 05/18/23 08:09 06/04/23 20:11 1 Eurofins Denver 0 Page 29 of 51 6/7/2023 QC Sample Results Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Method: 8290A - Dioxins and Furans (HRGC/HRMS) (Continued) Job ID: 280-176200-2 Lab Sample ID: MB 320-675691/1-A Client Sample ID: Method Blank Matrix: Solid Prep Type: Total/NA Analysis Batch: 680038 Prep Batch: 675691 MB MB Isotope Dilution %Recovery Qualifier Limits Prepared Analyzed Dil Fac 13C-1, 2, 3, 4, 6, 7, 8-HpCDD 81 40 -135 05118123 08:09 06/04/23 20:11 1 13C-1, 2, 3, 4, 7, 8-Hx CDF 94 40 -135 05/18/23 08:09 06104123 20:11 1 13C-1,2,3,4,6,7,8-HpCDF 82 40-135 05118123 08:09 06104123 20:11 1 13C-OCDD 79 40 -135 05118123 08:09 06104123 20:11 1 13C-OCDF 91 40-135 05/18/23 08:09 06/04/23 20:11 1 13C-1, 2, 3, 7, 8, 9-HxCDF 99 40 -135 05/18/23 08:09 06/04/23 20:11 1 13C-1, 2, 3, 4, 7, 8-HxCDD 78 40 -135 05/18/23 08:09 06104123 20:11 1 13C-1,2,3,6,7,8-HxCDF 95 40-135 05/18/23 08:09 • 06/04/23 20:11 1 13C-2, 3, 4, 7, 8-PeCDF 78 40 -135 05/18/23 08:09 06104123 20:11 1 13C-2, 3, 4, 6, 7, 8-HxCDF 104 40 -135 05118123 08:09 06104123 20:11 1 13C-1, 2, 3, 4, 7, 8, 9-HpCDF 90 40 -135 05/18/23 08:09 06104123 20:11 1 r Lab Sample ID: LCS 320-675691/2-A Matrix: Solid Analysis Batch: 680038 Analyte Spike Added LCS LCS Result Qualifier Client Sample ID: Lab Control Sample Prep Type: Total/NA Prep Batch: 675691 %Rec Unit D %Rec Limits 2,3,7,8-TCDD 20.0 20.7 pg/g 104 73-141 1,2,3,7,8-PeCDD 100 98.1 pg/g 98 77-126 1,2,3,4,7,8-HxCDD 100 101 pg/g 101 73-126 1,2,3,6,7,8-HxCDD 100 104 pg/g 104 76-142 1,2,3,7,8,9-HxCDD 100 108 pg/g 108 70-136 2,3,7,8-TCDF 20.0 21.1 pg/g 106 71 -153 1,2,3,4,6,7,8-HpCDD 100 97.7 pg/g 98 79-121 1,2,3,7,8-PeCDF 100 97.7 pg/g 98 72 -128 2,3,4,7,8-PeCDF 100 98.7 pg/g 99 72-127 OCDD 200 197 pg/g 99 76 -136 1,2,3,4,7,8-HxCDF 100 102 pg/g 102 73-127 1,2,3,6,7,8-HxCDF 100 97.5 pg/g 97 77-126 2,3,4,6,7,8-HxCDF 100 98.9 pg/g 99 77-126 1,2,3,7,8,9-HxCDF 100 96.4 pg/g 96 77-125 1,2,3,4,6,7,8-HpCDF 100 100 pg/g 100 78-138 1,2,3,4,7,8,9-HpCDF 100 96.5 pg/g 97 76-123 OCDF 200 204 pg/g 102 75 -130 LCS LCS Isotope Dilution %Recovery Qualifier Limits 13C-2, 3, 7, 8-TCDD 70 40 - 135 13C-1,2,3,7,8-PeCDD 67 40- 135 13C-1,2,3,6,7,8-HxCDD 67 40- 135 13C-2, 3, 7, 8-TCDF 78 40 - 135 13C-1,2,3,7,8-PeCDF 75 40-135 13C-1,2,3,4,6,7,8-HpCDD 69 40-135 13C-1,2,3,4,7,8-HxCDF 85 40-135 13C-1,2,3,4,6,7,8-HpCDF 74 40-135 13C-OCDD 72 40 -135 13C-OCDF 82 40-135 13C-1,2,3,7,8,9-HxCDF 86 40- 135 13C-1,2,3,4,7,8-HxCDD 72 40- 135 13C-1,2,3,6,7,8-HxCDF 85 40- 135 Eurofins Denver Page 30 of 51 6/7/2023 QC Sample Results Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Method: 8290A - Dioxins and Furans (HRGC/HRMS) (Continued) Lab Sample ID: LCS 320-675691/2-A Matrix: Solid Analysis Batch: 680038 Isotope Dilution 13C-2,3, 4, 7, 8-PeCDF 13C-2, 3, 4, 6, 7, 8-HxCDF 13C-1, 2, 3, 4, 7, 8, 9-HpCDF LCS LCS %Recovery Qualifier 72 88 78 Lab Sample ID: LCSD 320-675691/3-A Matrix: Solid Analysis Batch: 680038 Analyte 2,3,7,8-TCDD 1,2,3,7,8-PeCDD 1,2,3,4,7,8-HxCDD 1,2,3,6,7,8-HxCDD 1,2,3,7,8,9-HxCDD 2,3,7,8-TCDF 1,2,3,4,6,7,8-HpCDD 1,2,3,7,8-PeCDF 2,3,4,7,8-PeCDF OCDD 1,2,3,4,7,8-HxCDF 1,2,3,6,7,8-HxCDF 2,3,4,6,7,8-HxCDF 1,2,3,7,8,9-HxCDF 1,2,3,4,6,7,8-HpCDF 1,2,3,4,7,8,9-HpCDF OCDF Isotope Dilution 13C-2, 3, 7, 8-TCDD 13C-1, 2, 3, 7, 8-PeCDD 13C-1, 2, 3, 6, 7, 8-HxCDD 13C-2, 3, 7, 8-TCDF 13C-1, 2, 3, 7, 8-PeCDF 13C-1, 2, 3, 4, 6, 7, 8-HpCDD 13C-1, 2, 3, 4, 7, 8-HxCDF 13C-1, 2, 3, 4, 6, 7, 8-HpCDF 13C-OCDD 13C-OCDF 13C-1, 2, 3, 7, 8, 9-HxCDF 13C-1, 2, 3, 4, 7, 8-HxCDD 13C-1, 2, 3, 6, 7, 8-HxCDF 13C-2, 3, 4, 7, 8-PeCDF 13C-2, 3, 4, 6, 7, 8-HxCDF 13C-1, 2, 3, 4, 7, 8, 9-HpCDF LCSD LCSD %Recovery Qualifier 68 63 66 76 71 66 77 67 67 77 84 65 78 66 86 75 Limits 40-135 40-135 40-135 Spike Added 20.0 100 100 100 100 20.0 100 100 100 200 100 100 100 100 100 100 200 Limits 40 - 135 40 - 135 40 - 135 40 -135 40 -135 40 - 135 40 - 135 40-135 40-135 40-135 40-135 40-135 40-135 40-135 40-135 40-135 LCSD LCSD Result Qualifier 20.8 99.8 107 99.6 114 21.3 99.1 101 101 208 102 100 98.7 100 102 99.4 214 Job ID: 280-176200-2 Client Sample ID: Lab Control Sample Prep Type: Total/NA Prep Batch: 675691 Client Sample ID: Lab Control Sample Dup Prep Type: Total/NA Prep Batch: 675691 %Rec RPD Unit D %Rec Limits RPD Limit pg/g 104 73 -141 0 20 pg/g 100 77 -126 2 20 pg/g 107 73 -126 6 20 pg/g 100 76 -142 5 20 pg/g 114 70 -136 6 20 pg/g 107 71 -153 1 20 pg/g 99 79 -121 1 20 pg/g 101 72 -128 3 20 Pg/g 101 72 -127 2 20 pg/g 104 76 -136 5 20 pg/g 102 73 -127 0 20 pg/g 100 77 -126 3 20 pg/g 99 77 -126 0 20 pg/g 100 77 -125 4 20 pg/g 102 78 -138 2 20 pg/g 99 76 -123 3 20 pg/g 107 75 -130 5 20 Eurofins Denver Page 31 of 51 6/7/2023 QC Sample Results Client: SCS Engineers Job ID: 280-176200-2 Project/Site: Croman Mill Site, Ashland, Oregon Method: 8290A - Dioxins and Furans (HRGC/HRMS) (Continued) Lab Sample ID: 280-176200-21 MS Client Sample ID: DU03-230505-0.5 Matrix: Solid Prep Type: Total/NA Analysis Batch: 680038 Prep Batch: 675691 Sample Sample Spike MS MS %Rec Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits 2,3,7,8-TCDD 10 19.5 31.7 pg/g 111 73 -141 1,2,3,7,8-PeCDD 42 97.7 127 q Pg/g 88 77-126 1,2,3,4,7,8-HxCDD 13 B G 97.7 110 G pg/g 98 73 -126 1,2,3,6,7,8-HxCDD 350 F1 G 97.7 529 F1 G pg/g 179 76-142 1,2,3,7,8,9-HxCDD 160 F1 G 97.7 281 G pg/g 124 70-136 1,2,3,4,6,7,8-HpCDD 720 B G 97.7 1110 4 G pg/g 402 79-121 1,2,3,7,8-PeCDF 1.1 J B q 97.7 97.5 pg/g 99 72 -128 2,3,4,7,8-PeCDF 2.2 J B 97.7 98.0 pg/g 98 72 -127 OCDD 750 F1 B 195 1190 F1 pg/g 226 76 -136 1,2,3,4,7,8-HxCDF 6.8 B 97.7 110 pg/g 106 73-127 1,2,3,6,7,8-HxCDF 9.2 B 97.7 107 pg/g 100 77-126 2,3,4,6,7,8-HxCDF 8.1 B 97.7 109 pg/g 103 77 -126 1,2,3,7,8,9-HxCDF ND 97.7 99.7 pg/g 102 77 -125 1,2,3,4,6,7,8-HpCDF 670 B G 97.7 1020 4 G pg/g 361 78-138 1,2,3,4,7,8,9-HpCDF 12 B G 97.7 97.7 G pg/g 88 76 -123 OCDF 610 F1 B 195 1060 F1 pg/g 228 75 -130 MS MS Isotope Dilution %Recovery Qualifier Limits 13C-2, 3, 7, 8-TCDD 65 40 -135 13C-1,2,3,7,8-PeCDD 63 40-135 13C-1, 2, 3, 6, 7, 8-HxCDD 63 40 -135 13C-2,3,7,8-TCDF 68 40-135 13C-1,2,3,7,8-PeCDF 70 40-135 13C-1,2,3,4,6,7,8-HpCDD 68 40-135 13C-1,2,3,4,7,8-HxCDF 76 40-135 13C-1,2,3,4,6,7,8-HpCDF 68 40-135 13C-OCDD 74 40 -135 13C-OCDF 83 40 -135 13C-1,2,3,7,8,9-HxCDF 80 40-135 13C-1,2,3,4,7,8-HxCDD 66 40-135 13C-1,2,3,6,7,8-HxCDF 75 40-135 13C-2, 3, 4, 7, 8-PeCDF 68 40 -135 13C-2, 3, 4, 6, 7, 8-HxCDF 81 40 -135 13C-1,2,3,4,7,8,9-HpCDF 74 40- 135 Lab Sample ID: 280-176200-21 MSD Client Sample ID: DU03-230505-0.5 Matrix: Solid Prep Type: Total/NA Analysis Batch: 680038 Prep Batch: 675691 Sample Sample Spike MSD MSD %Rec RPD Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits RPD Limit 2,3,7,8-TCDD 10 19.4 32.1 pg/g 114 73-141 1 20 1,2,3,7,8-PeCDD 42 96.8 131 q pg/g 93 77-126 3 20 1,2,3,4,7,8-HxCDD 13 BG 96.8 114 G pg/g 104 73-126 4 20 1,2,3,6,7,8-HxCDD 350 F1 G 96.8 568 F1 G pg/g 221 76-142 7 20 1,2,3,7,8,9-HxCDD 160 F1 G 96.8 306 F1 G pg/g 151 70-136 9 20 1,2,3,4,6,7,8-HpCDD 720 B G 96.8 1070 4 G pg/g 364 79-121 4 20 1,2,3,7,8-PeCDF 1.1 J B q 96.8 96.2 pg/g 98 72 -128 1 20 2,3,4,7,8-PeCDF 2.2 J B 96.8 98.1 pg/g 99 72 -127 0 20 OCDD 750 F1 B 194 1120 F1 pg/g 192 76-136 6 20 Eurofins Denver Page 32 of 51 6/7/2023 QC Sample Results Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Method: 8290A - Dioxins and Furans (HRGC/HRMS) (Continued) Lab Sample ID: 280-176200-21 MSD Matrix: Solid Analysis Batch: 680038 Sample Sample Spike MSD MSD Analyte Result Qualifier Added Result Qualifier Unit 1,2,3,4,7,8-HxCDF 6.8 B 96.8 108 pg/g 1,2,3,6,7,8-HxCDF 9.2 B 96.8 105 pg/g 2,3,4,6,7,8-HxCDF 8.1 B 96.8 106 pg/g 1,2,3,7,8,9-HxCDF ND 96.8 98.3 pg/g 1,2,3,4,6,7,8-HpCDF 670 B G 96.8 971 4 G pg/g 1,2,3,4,7,8,9-HpCDF 12 B G 96.8 94.3 G pg/g OCDF 610 F1 B 194 1000 F1 pg/g MSD MSD Isotope Dilution %Recovery Qualifier Limits 13C-2, 3, 7, 8-TCDD 74 40 - 135 13C-1,2,3,7,8-PeCDD 70 40- 135 13C-1,2,3,6,7,8-HxCDD 67 40- 135 13C-2, 3, 7, 6-TCDF 78 40 - 135 13C-1,2,3,7,8-PeCDF 79 40- 135 13C-1,2,3,4,6,7,8-HpCDD 74 40- 135 13C-1,2,3,4,7,8-HxCDF 80 40- 135 13C-1,2,3,4,6,7,8-HpCDF 73 40- 135 13C-OCDD 81 40 - 135 13C-OCDF 89 40- 135 13C-1,2,3,7,8,9-HxCDF 87 40- 135 13C-1,2,3,4,7,8-HxCDD 70 40- 135 13C-1,2,3,6,7,8-HxCDF 80 40- 135 13C-2, 3, 4, 7, 8-PeCDF 74 40 - 135 13C-2,3,4,6,7,8-HxCDF 89 40- 135 13C-1,2,3,4,7,8,9-HpCDF 82 40- 135 Job ID: 280-176200-2 Client Sample ID: DU03-230505-0.5 Prep Type: Total/NA Prep Batch: 675691 %Rec RPD D %Rec Limits RPD Limit 105 73-127 2 20 99 77 -126 2 20 101 77-126 3 20 102 77-125 1 20 315 78-138 5 20 85 76 -123 4 20 201 75-130 5 20 a • Method: 8290A - Dioxins and Furans (HRGC/HRMS) - RA Lab Sample ID: 280-176200-21 MS Client Sample ID: DU03-230505-0.5 Matrix: Solid Prep Type: Total/NA Analysis Batch: 680723 Prep Batch: 675691 Sample Sample Spike MS MS %Rec Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits 2,3,7,8-TCDF - RA 1.9 19.5 22.0 pg/g 103 71 -153 MS MS Isotope Dilution %Recovery Qualifier Limits 13C-2, 3, 7, 8-TCDF - RA 77 40 -135 Lab Sample ID: 280-176200-21 MSD Matrix: Solid Analysis Batch: 680723 Sample Sample Analyte Result Qualifier 2,3,7,8-TCDF - RA 1.9 MSD MSD Isotope Dilution %Recovery Qualifier 13C-2, 3, 7, 8-TCDF - RA 85 Client Sample ID: DU03-230505-0.5 Prep Type: Total/NA Prep Batch: 675691 Spike MSD MSD %Rec RPD Added Result Qualifier Unit D %Rec Limits RPD Limit 19.4 22.8 pg/g 108 71 -153 4 20 Limits 40-135 Eurofins Denver Page 33 of 51 6/7/2023 QC Association Summary Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Job ID: 280-176200-2 Specialty Organics Prep Batch: 673787 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-176200-3 DU05-SU06-230505-COMP01 Total/NA Solid 8290 280-176200-4 DU05-SU06-230505-COMP02 Total/NA Solid 8290 MB 320-67378711-A Method Blank Total/NA Solid 8290 LCS 320-673787/2-A Lab Control Sample Total/NA Solid 8290 LCSD 320-673787/3-A Lab Control Sample Dup Total/NA Solid 8290 280-175901-B-1-B MS Matrix Spike Total/NA Solid 8290 280-175901-B-1-C MSD Matrix Spike Duplicate Total/NA Solid 8290 280-175901-B-1-D DU Duplicate Total/NA Solid 8290 Prep Batch: 675691 Lab Sample ID Client Sample ID Prep Type Matrix Method 280-176200-15 - RA DU01-230504-0.5 Total/NA Solid 8290 280-176200-15 DU01-230504-0.5 Total/NA Solid 8290 280-176200-16 - RA DU01-230504-0.5-Rep1 Total/NA Solid 8290 280-176200-16 DU01-230504-0.5-Rep1 Total/NA Solid 8290 280-176200-17 - RA DU01-230504-0.5-Rep2 Total/NA Solid 8290 280-176200-17 DU01-230504-0.5-Rep2 Total/NA Solid 8290 280-176200-18 - RA DU02-230504-0.5 Total/NA Solid 8290 280-176200-18 DU02-230504-0.5 Total/NA Solid 8290 280-176200-21 - RA DU03-230505-0.5 Total/NA Solid 8290 280-176200-21 DU03-230505-0.5 Total/NA Solid 8290 280-176200-22 - RA DU03-230505-0.5-Rep1 Total/NA Solid 8290 280-176200-22 DU03-230505-0.5-Rep1 Total/NA Solid 8290 280-176200-23 - RA DU03-230505-0.5-Rep2 Total/NA Solid 8290 280-176200-23 DU03-230505-0.5-Rep2 Total/NA Solid 8290 MB 320-675691/1-A Method Blank Total/NA Solid 8290 LCS 320-675691/2-A Lab Control Sample Total/NA Solid 8290 LCSD 320-675691/3-A Lab Control Sample Dup Total/NA Solid 8290 280-176200-21 MS - RA DU03-230505-0.5 Total/NA Solid 8290 280-176200-21 MS DU03-230505-0.5 Total/NA Solid 8290 280-176200-21 MSD - RA DU03-230505-0.5 Total/NA Solid 8290 280-176200-21 MSD DU03-230505-0.5 Total/NA Solid 8290 Analysis Batch: 678488 Prep Batch 10 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-176200-3 DU05-SU06-230505-COMP01 Total/NA Solid 8290A 673787 280-176200-4 DU05-SU06-230505-COMP02 Total/NA Solid 8290A 673787 MB 320-673787/1-A Method Blank Total/NA Solid 8290A 673787 LCS 320-673787/2-A Lab Control Sample Total/NA Solid 8290A 673787 LCSD 320-673787/3-A Lab Control Sample Dup Total/NA Solid 8290A 673787 Analysis Batch: 678489 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-175901-B-1-B MS Matrix Spike Total/NA Solid 8290A 673787 280-175901-B-1-C MSD Matrix Spike Duplicate Total/NA Solid 8290A 673787 280-175901-B-1-D DU Duplicate Total/NA Solid 8290A 673787 Analysis Batch: 680038 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-176200-15 DU01-230504-0.5 Total/NA Solid 629 AA 675691 j 280-176200-16 DU01-230504-0.5-Rep1 Total/NA Solid 8290A 675691 Eurofins Denver Page 34 of 51 6/7/2023 QC Association Summary Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Specialty Organics (Continued Analysis Batch: 680038 (Continued) Job ID: 280-176200-2 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-176200-17 DU01-230504-0.5-Rep2 Total/NA Solid 8290A 675691 280-176200-18 DU02-230504-0.5 Total/NA Solid 8290A 675691 280-176200-21 DU03-230505-0.5 Total/NA Solid 8290A 675691 280-176200-22 DU03-230505-0.5-Rep1 Total/NA Solid 8290A 675691 280-176200-23 DU03-230505-0.5-Rep2 Total/NA Solid 8290A 675691 MB 320-675691/1-A Method Blank Total/NA Solid 8290A 675691 LCS 320-675691/2-A Lab Control Sample Total/NA Solid 8290A 675691 LCSD 320-675691/3-A Lab Control Sample Dup Total/NA Solid 8290A 675691 280-176200-21 MS DU03-230505-0.5 Total/NA Solid 8290A 675691 280-176200-21 MSD DU03-230505-0.5 Total/NA Solid 8290A 675691 Analysis Batch: 680723 1 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-176200-15 - RA DU01-230504-0.5 Total/NA Solid 8290A 675691 280-176200-16.- RA DU01-230504-0.5-Rep1 Total/NA Solid 8290A 675691 280-176200-17 - RA DU01-230504-0.5-Rep2 Total/NA Solid 8290A 675691 280-176200-18 - RA DU02-230504-0.5 Total/NA Solid 8290A 675691 280-176200-21 - RA DU03-230505-0.5 Total/NA Solid 8290A 675691 280-176200-22 - RA DU03-230505-0.5-Rep1 Total/NA Solid 8290A 675691 280-176200-23 - RA DU03-230505-0.5-Rep2 Total/NA Solid 8290A 675691 280-176200-21 MS - RA DU03-230505-0.5 Total/NA Solid 8290A 675691 280-176200-21 MSD - RA DU03-230505-0.5 Total/NA Solid 8290A 675691 General Chemistry .-...-..- .............. - —- ..-...._.. Analysis Batch: 611989 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-176200-A-20 MS Matrix Spike Total/NA Solid Increment, prep 280-176200-A-20 MSD Matrix Spike Duplicate Total/NA Solid Increment, prep Analysis Batch: 611993 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-176200-15 DU01-230504-0.5 Total/NA Solid Increment, prep 280-176200-16 DU01-230504-0.5-Rep1 Total/NA Solid Increment, prep 280-176200-17 DU01-230504-0.5-Rep2 Total/NA Solid Increment, prep 280-176200-18 DU02-230504-0.5 Total/NA Solid Increment, prep 280-176200-21 DU03-230505-0.5 Total/NA Solid Increment, prep 280-176200-22 DU03-230505-0.5-Rep1 Total/NA Solid Increment, prep 280-176200-23 DU03-230505-0.5-Rep2 Total/NA Solid Increment, prep 280-176200-21 MS DU03-230505-0.5 Total/NA Solid Increment, prep 280-176200-21 MSD DU03-230505-0.5 Total/NA Solid Increment, prep Eurofins Denver Page 35 of 51 6/7/2023 Lab Chronicle Client: SCS Engineers Job ID: 280-176200-2 Project/Site: Croman Mill Site, Ashland, Oregon Client Sample ID: DU05-SU06-230505-COMP01 Lab Sample ID 280-176200-3 Date Collected: 05/05/23 10:20 Matrix: Solid Date Received: 05/09/23 09:15 Percent Solids: 82.7 Batch Batch Dil Initial Final Batch Prepared Prep Type Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab Total/NA Prep 8290 10.90 g 20.0 uL 673787 05/11/23 10:19 CB EET SAC Total/NA Analysis 8290A 1 1 Sample 1 Sample 678488 05/29/23 04:50 KSS EET SAC Client Sample ID: DU05-SU06-230505-COMP02 Lab Sample ID: 280-176200-4 Date Collected: 05/05/23 10:25 Matrix: Solid Date Received: 05/09/23 09:15 Percent Solids: 83.5 Batch Batch Dil Initial Final Batch Prepared Prep Type Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab Total/NA Prep 8290 10.34 g 20.0 uL 673787 05/11/23 10:19 CB EET SAC Total/NA Analysis 8290A 1 1 Sample 1 Sample 678488 05/29/23 05:38 KSS EET SAC Client Sample ID: DU01-230504-0.5 Lab Sample ID: 280-176200-15 Date Collected: 05/04/23 16:15 Matrix: Solid =< _- Date Received: 05/09/23 09:15 Batch Batch Dil Initial Final Batch Prepared Prep Type Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab Total/NA Prep 8290 RA 10.12 g 20.0 uL 675691 05/18/23 08:09 CB EET SAC Total/NA Analysis 8290A RA 1 1 uL 1 uL 680723 06/06/23 17:04 DB EET SAC Total/NA Prep 8290 10.12 g 20.0 uL 675691 05/18/23 08:09 CB EET SAC Total/NA Analysis 8290A 1 1 Sample 1 Sample 680038 06/04/23 22:34 DB EET SAC TotaUNA Analysis Increment, prep 1 611993 05/10/23 14:50 EKB EET DEN Client Sample ID: DU01-230504-0.5-Rep1 _..... .... . ------- -- Lab Sample ID: - -._... -- 280-176200-16 Date Collected: 05/04/23 16:25 Matrix: Solid Date Received: 05/09/23 09:15 Batch Batch Dil Initial Final Batch Prepared Prep Type Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab Total/NA Prep 8296 RA 10.21 g 20.0 uL 675691 05/18/23 08:09 CB EET SAC Total/NA Analysis 8290A RA 1 1 uL 1 uL 680723 06/06/23 17:47 DB EET SAC Total/NA Prep 8290 10.21 g 20.0 uL 675691 05/18/23 08:09 CB EET SAC Total/NA Analysis 8290A 1 1 Sample 1 Sample 680038 06/04/23 23:22 DB EET SAC Total/NA Analysis Increment, prep -- — -- 1 611993 05/10/23 14:50 EKB EET DEN --....._... - —— Client Sample ID: DU01-230504-0.5-Rep2 ---- Lab --- Sample ID: - 280-176200-17 Date Collected: 05/04/23 16:35 Matrix: Solid Date Received: 05/09/23 09:15 Batch Batch Dil Initial Final Batch Prepared Prep Type Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab Total/NA Prep 8290 RA 10.35 g 20.0 uL 675691 05/18/23 08:09 CB EET SAC Total/NA Analysis 8290A RA 1 1 uL 1 uL 680723 06/06/23 18:30 DB EET SAC Total/NA Prep 8290 10.35 g 20.0 uL 675691 05/18/23 08:09 CB EET SAC Total/NA Analysis 8290A 1 1 Sample 1 Sample 680038 06/05/23 00:09 DB EET SAC Total/NA Analysis Increment, prep 1 611993 05/10/23 14:50 EKB EET DEN Eurofins Denver Page 36 of 51 6/7/2023 Lab Chronicle Client: SCS Engineers Job ID: 280-176200-2 Project/Site: Croman Mill Site, Ashland, Oregon Client Sample ID: DU02-230504-0.5 Lab Sample ID: 280-176200-18 Date Collected: 05/04/23 17:00 Matrix: Solid Date Received: 05/09/23 09:15 Batch Batch Dil Initial Final Batch Prepared Prep Type Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab Total/NA Prep 8290 RA 10.17 g 20.0 uL 675691 05/18/23 08:09 CB EET SAC Total/NA Analysis 8290A RA 1 1 uL 1 uL 680723 06/06/23 19:13 DB EET SAC Total/NA Prep 8290 10.17 g 20.0 uL 675691 05/18/23 08:09 CB EET SAC Total/NA Analysis 8290A 1 1 Sample 1 Sample 680038 06/05/23 00:57 DB EET SAC Total/NA Analysis Increment, prep 1 611993 05/10/23 14:50 EKB EET DEN Client Sample ID. DU03-230505-0.5 Lab Sample ID: 280-176200-21 Date Collected: 05/05/23 11:15 Matrix: Solid Date Received: 05/09/23 09:15 Batch Batch Dil Initial Final Batch Prepared Prep Type Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab Total/NA Prep 8290 RA 10.29 g 20.0 uL 675691 05/18/23 08:09 CB EET SAC Total/NA Analysis 8290A RA 1 1 uL 1 uL 680723 06/06/23 19:57 DB EET SAC Total/NA Prep 8290 10.29 g 20.0 uL 675691 05/18/23 08:09 CB EET SAC Total/NA Analysis 8290A 1 1 Sample 1 Sample 680038 06/05/23 01:44 DB EET SAC Total/NA Analysis Increment, prep 1 611993 05/10/23 14:50 EKB EET DEN Client Sample ID: DU03-230505-0.5-Rep1 Lab Sample ID: 280-176200-22 Date Collected: 05/05/23 11:20 Matrix: Solid Date Received: 05/09/23 09:15 Batch Batch Dil Initial Final Batch Prepared Prep Type Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab Total/NA Prep 8290 RA 10.19 g 20.0 uL 675691 05/18/23 08:09 CB EET SAC Total/NA Analysis 8290A RA 1 1 uL 1 uL 680723 06/06/23 22:06 DB EET SAC Total/NA Prep 8290 10.19 g 20.0 uL 675691 05/18/23 08:09 CB EET SAC Total/NA Analysis 8290A 1 1 Sample 1 Sample 680038 06/05/23 04:07 DS EET SAC Total/NA Analysis Increment, prep 1 611993 05/10/23 14:50 EKB EET DEN Client Sample ID: DU03-230505-0.5-Rep2 Lab Sample ID: 280-176200-23 Date Collected: 05/05/23 11:25 Matrix: Solid Date Received: 05/09/23 09:15 Batch Batch Dil Initial Final Batch Prepared Prep Type Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab Total/NA Prep 8290 RA 10.66 g 20.0 uL 675691 05/18/23 08:09 CB EET SAC Total/NA Analysis 8290A RA 1 1 uL 1 uL 680723 06/06/23 22:49 DB EET SAC Total/NA Prep 8290 10.66 g 20.0 uL 675691 05/18/23 08:09 CB EET SAC Total/NA Analysis 8290A 1 1 Sample 1 Sample 680038 06/05/23 04:55 DB EET SAC Total/NA Analysis Increment, prep 1 611993 05/10/23 14:50 EKB EET DEN Laboratory References: EET DEN = Eurofins Denver, 4955 Yarrow Street, Arvada, CO 80002, TEL (303)736-0100 EET SAC = Eurofins Sacramento, 880 Riverside Parkway, West Sacramento, CA 95605, TEL (916)373-5600 Eurofins Denver Page 37 of 51 6/7/2023 Accreditation/Certification Summary Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Laboratory: Eurofins Denver Unless otherwise noted, all analytes for this laboratory were covered under each accreditation/certification below. Authority Prograi Oregon NELAP Job ID: 280-176200-2 Identification Number Expiration Date 4025-011 01-10-24 The following analytes are included in this report, but the laboratory is not certified by the governing authority. This list may include analytes for which the agency does not offer certification. Analysis Method Prep Method Matrix Analyte Increment, prep Solid Incremented sample generated Laboratory: Eurofins Sacramento All accreditations/certifications held by this laboratory are listed. Not all accreditations/certifications are applicable to this report. Authority Program Alaska (UST) State ANAB Dept. of Defense ELAP ANAB Dept. of Energy ANAB ISO/IEC 17025 Arizona State Arkansas DEQ State California State Colorado State Florida NELAP Georgia State Hawaii State Illinois NELAP Kansas NELAP Louisiana NELAP Louisiana (All) NELAP Maine State Nevada State New Hampshire NELAP New Jersey NELAP New York NELAP Ohio State Oregon NELAP Texas NELAP US Fish & Wildlife US Federal Programs USDA US Federal Programs Utah NELAP Virginia NELAP Washington State West Virginia (DW) State Wisconsin State Wyoming State Program Identification Number Expiration Date 17-020 02-20-24 L2468 01-20-24 L2468.01 01-20-24 L2468 01-20-24 AZ0708 08-11-23 88-0691 06-17-23 2897 01-22-24 CA0004 08-31-23 E87570 06-30-23 4040 01-29-24 <cert No.> 01-29-24 200060 03-17-24 E-10375 10-31-23 01944 06-30-23 01944 06-30-23 CA00004 04-14-24 CA00044 07-31-23 2997 04-18-24 CA005 06-30-23 11666 04-01-24 41252 01-29-24 4040 01-29-24 T104704399-19-13 05-31-24 58448 04-30-24 P330-18-00239 02-28-26 CA000442021-12 02-28-24 460278 03-14-24 C581 05-05-23 * 9930C 12-31-23 998204680 08-31-23 8TMS-L 01-28-19 * * Accreditation/Certification renewal pending - accreditation/certification considered valid. Eurofins Denver 112� Page 38 of 51 6/7/2023 N O N W Eurofins Seattle tiff eurofins 5755 8th Street East Chain of Custody Record r. ti Environment Testing —..— VVA QRA7A IFT w 0� cn ORIGIN ID:BNOA (503) 639-9548 SHIP DATE: 02MAY23 HEATHER WILLIAMS ACTWGT: 50.00 LB SCS 15940 �WI72ND AVENUE CAD: 110973956/1NET4610 U 1RTL STDAOES U324 BILL SENDER TO SAMPLE RECEIVING EUROFINS LABS-COLORADO 4955 YARROW ST m g ARVADA CO 80002 (I) 73M 100 REF: 04222021100 TASK 2 PD: DI=PT. Lrtjl I 1 I m ` I I I � Express Fedtx `� k ?{ TUE 09 MAY 10:30k 22a 0zs3i•7719 4048 77 , PRIORO O ERNIGI•!. . ME p 8000 XA LAAA co —us DENP I! I I� I 14839963 05/08 583J3/2BC3/FE2D- r r N co rn N O m ORIGIN ID.BNOA (503) 639-9548 SHIP DATE: 02MAY23 HEATHER WILLIAMS ACTWGT: 50.00 LB SCS ENGINEERS _CAD: 110973958/INET4610 15940 SW 72ND AVENUE -- PORTLAND OR 97224 BILL SENDER UNITED STATES US TO SAMPLE RECEIVING EUROFINS LABS-COLORADO 4955 YARROW ST m 9 ARVADA CO80002 tm + 5303) 736-0100 REF 04222021.00 TASK 2 -- - - W. -�EPTPO - - -- ' 1 I I I I Express i c tY I G�' I w'11 ■ I ' I II � L U) a rn N I N r � sdEx=- 09 MAV 10;301 s3 71� 4548 7998 PRIORITY OVERNIGH Y XA, LAAA 80O�r, co —us Dt��l *41139963 05/06 593J3l23C3/FE2D Eurofins Denver v N O Ut I N O IV W 4955 Yarrow Street Arvada, CO 80002 Phone:303-736-0100 Fax:303-431-7171 Chain of Custody Record ti titi eurofins Environment Telling Sampler Lab PM. Carrier Tracking No(s): COC No. Client Information Sub Contract Lab Gardner, Matthew O 280-656101.1 Client Contact Phone: E-Nair State of Origin. page. Shipping/Receiving Matthew Gardnertget.eurofinsus.com Oregon Page 1 of 1 Company: Accreditauons Required (Sae note) Job a: Eurofins Environment Testing Northern Ca NELAP - Oregon 280-176200-2 Address- 880 Riverside Parkway, Dus Data Requests& 6/6/2023 Analysis Requested Preservation Codes: M- Hexane N -None CityTAT RRequestedA-HCLd (days): j;�j West Sacramento a - NaOH C - Acetate P. Na204S Slate, Zip CA, 95605 i t8 ,. Ni D - Nitric Acid O - Nat O3 E-NeMSO4 R-NaTST03 F - McOH Phone PO #. 916-373-5600(Teq 916-372-1059(Fax) .a A o r S - HTSO4 G - Amchlor H - Ascorbic Acid T - TSP Dodecahydrale U - Acetone Email WO X ■ P ,7iy., p � bS, e ?. I -Ice Water V - MCAA K - EDTA W - PH 4-5 Project Name Project a. Croman Mill Site, Ashland, Oregon 28023587 ; ' L - EDA Y - Tnzma €�_ FF 3r'. Z - other (specify) Site: SSOWM. ,' Other: V o Sample Matrix Type Sample (C=Comp, Sam le Identification -Client ID 11 ab IDj Sample Date Time G= rab) BT•T--.A- Special Instructions/Note: DU01-230504-0.5 (280-176200-15) 5/4123 16 11f5 Pac Solid X X MON : ISM Lab Prep, No Grinding DUO 1-230504-0.5-Rept (280-176200-16) 5/4/23 16:25 Pacific Solid X X #�y Pre ISM Lab P. No Grinding DU01-230504-0.5-Rep2 (280-176200-17) 5/4/23 16:35 Pacific solid X X ISM Lab Prep, No Grinding DU02-230504-0.5 280-176200-18 ( ) 5/4/23 17.00 Solid X X 1f ISM Lab Pre No Grinding P g Pacific DU03-230505-0.5 (280-176200-21) 515/23 11:15 I Pacific Solid X X A ISM Lab Prep, No Grinding DU03-230505-0 5-Rep1 (280-176200-22) 5/5/23 t 1 (0 Solid X X ISM Lab Prep, No Grinding Pacc DU03-230505-0.5-Rep2 (280-176200-23) 5/5/23 11:25 Pacific- I Solid X X ISM Lab Prep, No Grinding Note: Since laboratory soareditationa are sub)eci to charge, Eurofins TestAmerica places the ownership of method, anatyte 6 accreditation compliance upon our subcontract laboratories. This sample shipment is forwarded under chain -of -custody . If the laboratory does not currently maintain accreditation in the State of Origin listed above for Analysis/teatsimaMa being analyzed, the samples must be shipped back to the Eurofins TeslAmenca laboratory of other instructions vall be provided Any changes to accreditation status should be brought to Eurofins TeatAmeuca attention Immediately. If all requested accredllations are current to date, return the signed Chain of Custody attesting to said compliance to Eurofins TestAmenca. Possible Hazard Identification Sam /e Disposal (A fee may be assessed if samples are retained longer than 1 month) Unconfirmed Retum To Client = Disposal By Lab Archive For Months Deliverable Requested: 1, II, III, IV, Other (specify) Primary Deliverable Rank: 2 Special Instructions/OC Requirements Empty Kit Relinquished by: Date Time: Method of Shipment Rar — - Dalerf r. Co Received b DaI trims: , �(� Co Relinquished by: Daterrime Company Re I a eTme-. Company Relinquished by: Dalai Company Received b DaterTime: Company Cust e s Intact: CustodySeal No. Cooler Temperature(q °C and Other Remarks Yes 4 No Ver: 06/08/2021 [41 Login Sample Receipt Checklist Client: SCS Engineers Job Number: 280-176200-2 Login Number: 176200 List Source: Eurofins Denver List Number: 1 Creator: Roehsner, Karen P Question Answer Comment Radioactivity wasn't checked or is </= background as measured by a survey True meter. The cooler's custody seal, if present, is intact. True Sample custody seals, if present, are intact. True The cooler or samples do not appear to have been compromised or True tampered with. Samples were received on ice. True Cooler Temperature is acceptable. True Cooler Temperature is recorded. True COC is present. True COC is filled out in ink and legible. True COC is filled out with all pertinent information. True Is the Field Sampler's name present on COC? True There are no discrepancies between the containers received and the COC. True Samples are received within Holding Time (excluding tests with immediate False Refer to Job Narrative for details. HTs) Sample containers have legible labels. True Containers are not broken or leaking. True Sample collection date/times are provided. True Appropriate sample containers are used. True Sample bottles are completely filled. True Sample Preservation Verified. N/A There is sufficient vol. for all requested analyses, incl. any requested True MS/MSDs Containers requiring zero headspace have no headspace or bubble is False Narrative to indicate if headspace container used <6mm (1/4"). for analysis. Multiphasic samples are not present. True Samples do not require splitting or compositing. True Residual Chlorine Checked. N/A Eurofins Denver Page 42 of 51 6/7/2023 Login Sample Receipt Checklist Client: SCS Engineers Login Number: 176200 List Number: 2 Creator: Simmons, Jason C Question Radioactivity wasn't checked or is </= background as measured by a survey meter. The cooler's custody seal, if present, is intact. Sample custody seals, if present, are intact. The cooler or samples do not appear to have been compromised or tampered with. Samples were received on ice. Cooler Temperature is acceptable. Cooler Temperature is recorded. COC is present. COC is filled out in ink and legible. COC is filled out with all pertinent information. Is the Field Sampler's name present on COC? There are no discrepancies between the containers received and the COC. Samples are received within Holding Time (excluding tests with immediate HTs) Sample containers have legible labels. Containers are not broken or leaking. Sample collection date/times are provided. Appropriate sample containers are used. Sample bottles are completely filled. Sample Preservation Verified. There is sufficient vol. for all requested analyses, incl. any requested MS/MSDs Containers requiring zero headspace have no headspace or bubble is <6mm (1/4"). Multiphasic samples are not present. Samples do not require splitting or compositing. Residual Chlorine Checked. Job Number: 280-176200-2 List Source: Eurofins Sacramento List Creation: 05/10/23 01:35 PM Answer Comment True True Seal N/A True True True True True True True N/A True True True True True True True N/A True True True True N/A 1.8c Received project as a subcontract. F14 Eurofins Denver Page 43 of 51 6/7/2023 Login Sample Receipt Checklist Client: SCS Engineers Job Number: 280-176200-2 Login Number: 176200 List Source: Eurofins Sacramento List Number: 4 List Creation: 06/13/23 03:45 PM Creator: Guzman, Juan Question Answer Comment Radioactivity wasn't checked or is </= background as measured by a survey True meter. The cooler's custody seal, if present, is intact. N/A Sample custody seals, if present, are intact. N/A The cooler or samples do not appear to have been compromised or True tampered with. Samples were received on ice. False Cooler Temperature is acceptable. True Cooler Temperature is recorded. True 21.3 COC is present. True COC is filled out in ink and legible. True COC is filled out with all pertinent information. True Is the Field Sampler's name present on COC? False Received project as a subcontract. There are no discrepancies between the containers received and the COC. True Samples are received within Holding Time (excluding tests with immediate True HTs) Sample containers have legible labels. True Containers are not broken or leaking. True Sample collection date/times are provided. True Appropriate sample containers are used. True Sample bottles are completely filled. True Sample Preservation Verified. N/A There is sufficient vol. for all requested analyses, incl. any requested True MS/MSDs Containers requiring zero headspace have no headspace or bubble is True <6mm (1/4"). Multiphasic samples are not present. True Samples do not require splitting or compositing. True Residual Chlorine Checked. N/A [14 Eurofins Denver Page 44 of 51 6/7/2023 Isotope Dilution Summary Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Job ID: 280-176200-2 Method: 8290A - Dioxins and Furans (HRGC/HRMS) Matrix: Solid Prep Type: Total/NA Lab Sample ID Client Sample ID TCDD (40-135) 280-175901-B-1-B MS Matrix Spike 56 280-175901-B-1-C MSD Matrix Spike Duplicate 62 280-175901-B-1-D DU Duplicate 55 280-176200-3 DU05-SU06-230505-COMP01 60 280-176200-4 DU05-SU06-230505-COMP02 56 280-176200-15 DU01-230504-0.5 67 280-176200-15 - RA DU01-230504-0.5 280-176200-16 DU01-230504-0.5-Rep1 70 280-176200-16 - RA DU01-230504-0.5-Rep1 280-176200-17 DU01-230504-0.5-Rep2 55 280-176200-17 - RA DU01-230504-0.5-Rep2 280-176200-18 DU02-230504-0.5 70 280-176200-18 - RA DU02-230504-0.5 280-176200-21 DU03-230505-0.5 75 280-176200-21 - RA DU03-230505-0.5 280-176200-21 MS DU03-230505-0.5 65 280-176200-21 MS - RA DU03-230505-0.5 280-176200-21 MSD DU03-230505-0.5 74 280-176200-21 MSD - RA DU03-230505-0.5 280-176200-22 DU03-230505-0.5-Rep1 69 280-176200-22 - RA DU03-230505-0.5-Rep1 280-176200-23 DU03-230505-0.5-Rep2 72 280-176200-23 - RA DU03-230505-0.5-Rep2 LCS 320-673787/2-A Lab Control Sample 58 LCS 320-675691/2-A Lab Control Sample 70 LCSD 320-673787/3-A Lab Control Sample Dup 58 LCSD 320-675691/3-A Lab Control Sample Dup 68 MB 320-673787/1-A Method Blank 66 MB 320-675691/1-A Method Blank 79 Lab Sample ID Client Sample ID OCDD (40-135) 280-175901-B-1-B MS Matrix Spike 43 280-175901-B-1-C MSD Matrix Spike Duplicate 54 280-175901-B-1-D DU Duplicate 56 280-176200-3 DU05-SU06-230505-COMP01 67 280-176200-4 DU05-SU06-230505-COMP02 63 280-176200-15 DU01-230504-0.5 73 280-176200-15 - RA DU01-230504-0.5 280-176200-16 DU01-230504-0.5-Rep1 82 280-176200-16 - RA DU01-230504-0.5-Rep1 280-176200-17 DU01-230504-0.5-Rep2 58 280-176200-17 - RA DU01-230504-0.5-Rep2 280-176200-18 DU02-230504-0.5 75 280-176200-18 - RA DU02-230504-0.5 280-176200-21 DU03-230505-0.5 78 280-176200-21 - RA DU03-230505-0.5 280-176200-21 MS DU03-230505-0.5 74 280-176200-21 MS - RA DU03-230505-0.5 Percent Isotope Dilution Recovery (Acceptance Limits) PeCDD HxDD TCDF PeCDF HpCDD HxCDF HpCDF (40-135) (40-135) (40-135) (40-135) (40-135) (40-135) (40-135) 66 49 44 58 53 39*5- 40 69 62 52 64 61 50 49 65 61 51 58 67 46 51 70 66 50 57 70 53 58 62 58 48 56 66 48 52 65 63 75 72 67 77 66 69 64 63 74 73 72 75 66 77 50 49 60 56 53 59 52 55 66 67 68 q 74 70 79 70 80 69 70 81 83 76 86 72 84 63 63 68 70 68 76 68 77 70 67 78 79 74 80 73 85 67 65 74 73 71 75 68 88 68 69 76 76 70 80 69 72 q 68 61 49 61 72 52 59 67 67 78 75 69 85 74 75 65 49 62 70 53 58 63 66 76 71 66 77 67 68 70 53 69 76 60 68 75 76 88 85 81 94 82 Percent Isotope Dilution Recovery (Acceptance Limits) OCDF HxCF HxCDD HxDF PeCF 13CHxCF HpCDF2 (40-135) (40-135) (40-135) (40-135) (40-135) (40-135) (40-135) 37*5- 44 47 45 51 50 46 46 49 58 56 57 57 54 47 48 56 55 53 56 56 57 51 63 60 57 61 60 54 50 56 54 52 56 58 80 82 65 78 67 85 74 88 87 66 74 67 88 80 64 66 51 60 53 67 60 84 82 68 79 71 85 78 85 93 70 83 77 93 83 83 80 66 75 68 81 74 Eurofins Denver Page 45 of 51 6/7/2023 Isotope Dilution Summary Client: SCS Engineers Project/Site: Croman Mill Site, Ashland, Oregon Method: 8290A - Dioxins and Furans (HRGC/HRMS) (Continued) Matrix: Solid Lab Sample ID 280-176200-21 MSD 280-176200-21 MSD - RA 280-176200-22 280-176200-22 - RA 280-176200-23 280-176200-23 - RA LCS 320-673787/2-A LCS 320-675691/2-A LCSD 320-673787/3-A LCSD 320-675691/3-A MB 320-673787/1-A MB 320-675691 /1-A Surrogate Legend Job ID: 280-176200-2 Prep Type: Total/NA Percent Isotope Dilution Recovery (Acceptance Limits) OCDD OCDF HxCF HxCDD HxDF PeCF 13CHxCF HpCDF2 Client Sample ID (40-135) (40-135) (40-135) (40-135) (40-135) (40-135) (40-135) (40-135) DU03-230505-0.5 81 89 87 70 80 74 89 82 DU03-230505-0.5 DU03-230505-0.5-Rep1 74 83 84 63 74 69 85 79 DU03-230505-0.5-Rep 1 DU03-230505-0.5-Rep2 71 81 85 68 79 72 87 79 DU03-230505-0.5-Rep2 Lab Control Sample 69 60 57 60 63 52 64 62 Lab Control Sample 72 82 86 72 85 72 88 78 Lab Control Sample Dup 65 55 52 63 61 60 61 59 Lab Control Sample Dup 67 77 84 65 78 66 86 75 Method Blank 71 61 56 70 71 64 66 66 Method Blank 79 91 99 78 95 78 104 90 TCDD = 13C-2,3,7,8-TCDD PeCDD = 13C-1,2,3,7,8-PeCDD HxDD = 13C-1,2,3,6,7,8-HxCDD TCDF = 13C-2,3,7,8-TCDF PeCDF = 13C-1,2,3,7,8-PeCDF HpCDD = 13C-1,2,3,4,6,7,8-HpCDD HxCDF = 13C-1,2,3,4,7,8-HxCDF HpCDF = 13C-1,2,3,4,6,7,8-HpCDF OCDD = 13C-OCDD OCDF = 13C-OCDF HxCF = 13C-1,2,3,7,8,9-HxCDF HxCDD = 13C-1,2,3,4,7,8-HxCDD HxDF = 13C-1,2,3,6,7,8-HxCDF PeCF = 13C-2,3,4,7,8-PeCDF 13CHxCF = 13C-2,3,4,6,7,8-HxCDF HpCDF2 = 13C-1,2,3,4,7,8,9-HpCDF Eurofins Denver 15' Page 46 of 51 6/7/2023 ti-eurofins Environment Testing TestAmerica Job: Sacramento Sample Receiving Notes Tracking # 6 ( 2. S " 000V - I 1 11 ( SO (!_�)/ FO / SAT / 2-Day / Ground / UPS / CDO / Courier GSO / OnTrac / Goldstreak / USPS / Other Use this form to record Sample Custody Seal, Cooler Custody Seal, Temperature & corrected Temperature & other observations. t-iie in me Ioo rolaer win Therm. ID: Corr. Factor: ( + °C Notes: Ice Wet Gel Other �1_N Cooler Custody Seal: Cooler ID: 2 Ohs- 2- Temp Observed. _7, k - � °C Corrected: 2 °C From: Temp Blank ❑ Sample 8" Opening/Processing The Shipment Yes No NA Cooler compromised/tampered with? ❑ ,p,_ ❑ Cooler Temperature is acceptable? p_ ❑ ❑ Frozen samples show signs of thaw? ❑ ❑ / Initials: Date: � / 3 / 23 1 Unpacking/Labeling The Samples Yes No NA COC is complete w/o discrepancies? B- ❑ ❑ Samples compromised/tampered with? ❑ M_ ❑ Containers are not broken or leaking? 8--_ ❑ ❑ Sample custody seal? ❑ E�- ❑ Sample containers have legible labels? 0--) ❑ ❑ Sample date/times are provided? 8-- ❑ ❑ Appropriate containers are used? Q_ ❑ ❑ Sample bottles are completely filled? p_- ❑ ❑ Trizma Lot #(s): Sample preservatives verified? ❑ ❑ .o., Is the Field Sampler's name on COC? ❑ ❑ dZ Samples require splitting/compositing? ❑ ❑ 0 Samples w/o discrepancies? Zero headspace?` Alkalinity has no headspace? Perchlorate has headspace? (Methods 314. 331, 6850) e- ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ 121.1 B- 2r- Login Completion Yes No NA Receipt Temperature on COC? Q., ❑ ❑ Samples received within hold time? 8- ❑ ❑ NCM Filed? ❑ '@- ❑ Multiphasic samples are not present? g— ❑ ❑ Log Release checked in TALS? ❑ ❑ CL_ 'Containers requiring zero headspace have no headspace, or bubble < 6 mm (1/4') 11 Initials: l/� Date: L(3 3 / l Initials:_ Date: ` 1 IITACORPICORPIQAIQA FACILITIESISACRAMENTO-QAIDOCUMENT-MANAGEMENTIFORMSIQA-812 SAMPLE RECEIVING NOTES.DOC QA-812 MBB 05POV2022 16 Page 47 of 51 W I _ n 6/7/2023 T m cn m co 0 v, ff s ISM_A_DD_SI_SS Analysis Sheet (To Accompany Samples to Instruments) Batch Number: 280-611993 Analyst: Bunzli, Eric K Batch Open: 5/10/2023 2:50:OOPM Batch End: 5/12/2023 1:46:OOPM Batch Notes First Start time 05/10/2023 14:50 First End time 05/12/2023 13:47 Date and Time laid out to Dry 05/10/2023 17:09 Date and Time When Sieved 05/11/2023 19:51 Laid out on Parchment or Foil Parchment Mesh Size of Seive 10 Analyst ID - Sieving MLT Analyst ID - Label Check Reviewer: MLT Balance ID 38602403, 24750399 Digestion Tube/Cup ID NA SOP Number DV-OP-0013 Batch Comment 1 Og to Sacramento for 8290; tower: Nano Comments N 0 Printed : 5/12/2023 Page 2 of 3 N w Eurofins Denver 4M W K") 0 . v �n m CD 0 �L N 0 N W Batch Number: 280-611993 ISM_A_DD_SI_SS Analysis Sheet (To Accompany Samples to Instruments) Analyst: Bunzli, Eric K Reagent Additions Worksheet Batch Open: 5/10/2023 2:50:00PM Batch End: 5/12/2023 1:46:00PM Lab ID Reagent Code Amount Added Final Amount By Witness Other Reagents: Reagent Amount/Units Lot#: Printed : 5/12/2023 Page 3 of 3 Eurofins Denver Envi•--- -mot testing; Test 8 q 13; 30 S T 44 7~ 05.13 ORIGIN ID=WHHA 01) 796-0100 SHIP DATE: 12MAY23 EUROFINS ACTWGT: 7.30 LB - j. EUROFINS TESTA CA DELVER CAD: 290884/CAFE3621 4955 YARROW'Sj may, , ARVADA. CO 800? UNITED STATES S BILL SENDER To SHIPPING/RECEIVING' EUROFINS ENVIRONMENT TESTING NORTHE 880 RIVERSIDE PARKWAY WEST SACRAMENTO CA 95605 ( 373-6600 REF, 6280 - 130327 016) G0, YES DEPT: BOTTLE PEWP 11111111111111111111111111111111111111111 HE II11111111111111111111111111111 1 3 { I FedEit i IE 2 of 2 SATURDAY 12, op'* 6425 0004 7196 PRIORITY OUERNI Mstr# 8425 0004 7185 of zo11 XO BLUA CA -US RI [16 Page 50 of 51 6/7/2023 ti eurofins ! i Environment Testing TestAmerica Job11111111111111JI�IVIIIII�IINI�I i Sacramento Sample Receiving Notes Tracking # :(a nllor) Ly SO PO FO /SAT / 2-Day /Ground /UPS / CDO /Courier Gs6.,kdnTrac / Goldstreak / USPS / Other Use this form to record Sample Custody Seal, Cooler Custody Seal, Temperature & corrected Temperature & other observations. rile In ine IOD roicer wan the C:VI:. Therm. ID: Corr. Factor: ( + / - ) °C Ice / Wet Gel Other Cooler Custody Seal. - Cooler ID: / Temp Observed: °C Corrected:l °C From: Temp Blank ❑ Sample D Open ing/Processing The Shipment Yes No NA Cooler compromised/tampered with? D 7 ❑ Cooler Temperature is acceptable? 'IV ❑ ❑/ Frozen s show signs f thaw?b. ❑ �] Initials: Date. 23 Unpacking/Labeling The Samples Yes No NA COC is complete w/o discrepancies? � ❑ D Samples compromised/tampered with? ❑ D � Containers are not broken or leaking? / ❑ D Sample custody seal? ❑ ❑ Sample containers have legible labels? ❑ ❑ Sample date/times are provided? ❑ D Appropriate containers are used? �i ❑ ❑ Sample bottles are completely filled? /� ❑ ❑ Sample preservatives verified? ❑ ❑ Is the Field Sampler's name on COC? ❑ ❑ Samples require splitting/compositing? ❑ ❑ Samples w/o discrepancies? q/ ❑ ❑ Zero headspace?' /❑ ❑ Alkalinity has no headspace? ❑ ❑"'ley Perchlorate has headspace? ❑ ❑ (Methods 314, 331, 6850) Multiphasic samples are not present? � D ❑ 'Containers req g headspace have no headspace, or bubble < 6 mm (114) Notes. - Trizma Lot #(s): Login Completion Yes No NA Receipt Temperature on COC? ❑ ❑ Samples received within hold time? ❑ ❑ NCM Filed? ❑ ❑ Log Relea hecked in TALS?S ❑ In Initials: Dat V 0-5 IITACORPICORPIQAIQA_FACILITIESISACRAMENTO-QAIDOCUMENT-MANAGEMENTIFORMSIQA-812 SAMPLE RECEIVING NOTES.DOC �ag�'& QA-812 MBB 05/10/2022 6/7/2023 lj6 ° LEGEND DU01 = Green Chain, Former Wood Treatment Area DU02 = Wood Waste Burner LF DU03 = Wood Waste Burner �, ► Y DU04 = Veneer Mill - Drum and Light Ballast Storage iv e� DU05 = Pond DU06 = Truck and Maintenance Shop r DU07 = North Landfill Area i f--,. c, DU08 = Fuel Shed and former USTs � DU09 = Site -wide Groundwater 0 i Proposed Temporary GW Sampling Locations 0 200 400 1 I I SCALE IN MILES PROJECT NO. 04222021.00 DES BY L.E.L SITE PLAN DATE FEBRUARY 2023 Environmental Consultants and Contractors CROMAN PROPERTY SCALE AS SHOWN CHKBY B.L. FIGURE 15940 SW 72non 97224 Avenue 146 MISTLETOE ROAD /J 4-1 c APP BY (503) 639 9201 FAX' (503) 684-6948 FIGURE 4-1 S.L. ASHLAND, OREGON 97520 From: CHAVEZ Anthony * DEQ <Anthony.CHAVEZ@deq.oregon.gov> Sent: Monday, July 17, 2023 02:17 PM To: Greg Aitken <greg.aitken@external.ashland.or.us> Cc: HANSON Don * DEQ <Don.HANSON@deq.oregon.gov>; SHULTZ Brad * DEQ <Brad.Shultz@deq.oregon.gov>; ZANNI Jason * DEQ <Jason.ZANNI@deq.oregon.gov>; Brandon Goldman <brandon.goldman@ashland.or.us>; Derek Severson <derek.severson@ashland.or.us>; SAWKA Nancy * DEQ <Nancy.SAWKA@deq.oregon.gov> Subject: RE: July 31 Ashland city council study session re: former Croman Mill [EXTERNAL SENDER] Hi Greg, please see embedded DEQ responses below in blue bold. Thank you, Anthony From: Greg Aitken <greg.aitken@external.ashland.or.us> Sent: Monday, July 17, 2023 9:34 AM To: CHAVEZ Anthony * DEQ <Anthony.CHAVEZ@deq.oregon.gov> Cc: HANSON Don * DEQ <Don.HANSON@deq.oregon.gov>; SHULTZ Brad * DEQ <Brad.Shultz@deq.oregon.gov>; ZANNI Jason * DEQ <jason.zanni@deq.oregon.gov>; Brandon Goldman <brandon.goldman@ashland.or.us>; Derek Severson <derek.severson@ashland.or.us> Subject: July 31 Ashland city council study session re: former Croman Mill Thank you for the preliminary report, Anthony, and your assistance in making good progress with environmental site investigation of the former Croman property. By this Thursday, July 20, City staff need to produce an information packet for Council members that includes a simplified plain language summary of the preliminary results. Are you able to generate something along these lines, along with a site plan showing sampling locations? We would also like to include this on our city website for public information about the Croman project. 1. Please include the property owner's estimated schedule for the submittal of the interim remedial action workplan to DEQ, and the anticipated schedule for interim actions. We have inquired with Croman's consultant and will follow up when a response is received. The work plan is anticipated quickly, as their contractor has some time this summer. 2. The reported dioxin and TPH results indicate that it would be prudent to sample downgradient surface water in order to rule out off -site impacts. Did DEQ have an opportunity to consider the merit of sampling potential ditch locations raised by city staff at the May 2 site visit and in the May 4, 2023 email? DEQ previously and currently advised that surface water or sediment sampling be completed near the site border to assess for potential offsite migration. In our most recent meeting, Croman agreed to more reconnaissance and surface water (or sediment) sampling where possible between the source areas and receiving water bodies. 3. By Thursday, July 20, city staff need to finalize the list of project representatives attending the Council study session, and provide participants with a videoconference link. Please provide a list of participants. Will the property owner be represented by SCS Engineers? DEQ has not communicated with Croman about their potential attendance at the City Council meeting. Please remind us when this meeting is occurring so we can let the owner know, and DEQ can confirm what staff will be able to attend. 4. In light of the dioxin results, will site security be enhanced to clearly identify and prevent access to the three identified areas of concern? At a minimum, it would be prudent to post signage and install fencing to secure the wood treatment dip tank area, the north wood burner, and the south wood burner. These areas are currently not secure to prevent access to trespassers and authorized site workers. Based on current site security measures (private fenced property) and moderate dioxin detections, DEQ does not believe additional security is needed. 5. Please be prepared to address the current regulatory status of the stockpiled materials. DEQ's solid waste program will answer. The owner indicated during our last meeting that no materials, except for some asphalt and solid waste, have left the site for several months, and that they were giving notice to the City prior to that of other materials going off -site (i.e., wood waste). City staff would welcome an opportunity to discuss these items further, in advance of the Council study session. Please let us know how we can facilitate your work on this important project, thank you Anthony. We could meet prior to the study session. If you would like to do that, please provide some days/times for consideration. Greg Aitken Community Development, City of Ashland C:►� Council Study Session July 31, 2023 Agenda Item Enterprise Funds - Ending Fund Balance Review From Mariane Berry Title: Finance Director Contact Mariane.Berry(@ashland.or.us II #541.552.2015 Item Type Requested by Council ® Update ElRequest for Direction ❑ Presentation Consent ❑ Public Hearing ❑ New Business ❑ Old Business ❑ SUMMARY During the recent budget process, there was interest by Council to review the ending fund balance policies for the Enterprise Funds. This presentation includes the input from Enterprise Fund Department Heads: Scott Fleury, Public Works Director; Tom McBartlett, Electric Director; Jason Wegner, DoIT Director. POLICIES, PLANS & GOALS SUPPORTED Sound fiscal policies are central to a successful and strategic long-term approach to financial management. BACKGROUND AND ADDITIONAL INFORMATION The presentation will review the fund balance policies of the City's Enterprise Funds in conjunction with best practices, GFOA (Government Finance Officers Association) guidance, and the policies of other municipalities as examples. We will also discuss current and long-term operations for the enterprise funds, as well as the current environment/landscape of operating these utilities, and how that is considered in the determination of the ending fund balance reserves. It is important to also note that in conjunction with the approval of each biennium budget, rate setting and rate analysis are performed for each enterprise fund. This in-depth process using consultants and subject matter experts considers policy requirements, current and future debt and contingencies. The City's current Enterprise Funds with their respective reserve policy are: ■ Water Fund - 25% average annual expenditure of prior three years + debt/legal requirements ■ SDC Water Fund - N/A ■ Wastewater Fund - 25% average annual expenditure of prior three years + debt/legal requirements ■ SDC Wastewater Fund - N/A ■ Stormwater Fund - 20% average annual expenditure of prior three years ■ SDC Storm Water - N/A ■ Electric Fund - 25% average annual expenditure of prior three years + debt/legal requirements ■ Telecommunications Fund - 20% average annual expenditure of prior three years + debt/legal requirements Please note that the SDC enterprise funds were not effective until July 1, 2023. Additionally, a contingency appropriation is budgeted for non -recurring expenditures of 3% of annual operating expenditures for the Water, Wastewater, Stormwater, Electric, and Telecommunications Funds. Page 1 of 2 r Council Study Session FISCAL IMPACTS Fiscal impacts of establishing appropriate reserve levels for enterprise funds would include the ability/capacity to weather large financial outflows. If not set sufficiently, it may weaken the enterprise when an unforeseen emergency and/or changes in economic conditions occur. Fiscal impacts might also include the effects on rates to the utility rate payers if the enterprise cannot adequately absorb non -recurring expenditure or emergency -types of events. DISCUSSION QUESTIONS The following are questions and/or discussion items that Council may choose to dialogue on with regards to the policy review. • Review of the current reserve policies for each fund • Discussion of GFOA guidelines and other comparable policies • What constitutes appropriate use of reserve funds? • How does debt coverage and credit rating play into these levels? • Discussion of the City of Ashland's specific risk attributes - climate impact, wildfires, and other changes in economic conditions • Discussion of the City's staffing levels currently and during the past few years and how that impacts the enterprise fund balances • How do national/global impacts such as COVID, inflation, supply chain pressures impact ending fund balance for enterprises? • How has City of Ashland's reserve policies affected rate increases? • Discussion of the City's current initiatives this biennium in the Water Fund, Electric Fund, and Telecommunications Fund • Department Head input on current reserve policies • What are the Council's specific goals as it relates to changing the current reserve levels? Can those goals be met through current appropriation and/or planning? SUGGESTED NEXT STEPS Depending on the outcome of the discussion, Council may choose to leave the current policy in place or some derivation of changing the restriction levels. More information may be needed by the Department Head of any one specific enterprise fund to discuss impacts to operations or long-term planning by changing the policy. REFERENCES & ATTACHMENTS Attachment #1: City of Ashland Financial Policies, approved by Council 5/16/23 Attachment #2: Statement of Resources, Requirements and Changes in Fund Balance as of May 31, 2023 for the following funds - Water, Wastewater, Stormwater, Electric and Telecommunications Page 2 of 2 Irk;. Attachment #1 City of Ashland Financial Management Policies Financial Management Policies The Financial Management Policies apply to fiscal activities of the City of Ashland. Objectives The objectives of Ashland's financial policies are as follows: • To enhance the City Council's decision -making ability by providing accurate information on program and operating costs. • To employ revenue policies that prevent undue or unbalanced reliance on any one source, distribute the cost of municipal services fairly, and provide adequate funds to operate desired programs. • To provide and maintain essential public programs, services, facilities, utilities, infrastructure, and capital equipment. • To protect and enhance the City's credit rating and financial wellbeing. • To ensure the legal use of all City funds through efficient systems of financial security and internal control. The City of Ashland does not discriminate in providing services, purchasing goods or services, and in matters of employment. Investments and Banking All City funds shall be invested to provide —in order of importance —safety of principal, a sufficient level of liquidity to meet cash flow needs, and the maximum yield possible. One hundred percent of all idle cash will be continuously invested in accordance with State law and recommended government finance industry standards. The City of Ashland has a Banking Policy of authorized signatures, including facsimile signatures for banking services on behalf of the City of Ashland that is part of this document and is labeled Attachment 1 (one). The City of Ashland has a detailed Investment Policy and is part of this document is labeled Attachment 2 (two). Accounting The City will maintain an accounting and financial reporting system that conforms to Generally Accepted Accounting Principles (GAAP) and Oregon Local Budget Law and in compliance with Government Accounting Standards Board (GASB) Adopted by Resolution No. 2023-09 (May 16, 2023) City of Ashland Financial Management Policies statements. The City will issue a Comprehensive Annual Financial Report (Audit report) each fiscal year. The Annual Comprehensive Financial Report (ACFR) shows fund expenditures and revenues on both a GAAP and budget basis for comparison purposes. • An independent annual audit will be performed by a certified public accounting firm that will issue an official opinion on the annual financial statements and a management letter as needed or required detailing areas that need improvement. • Full disclosure will be provided in financial statements and bond representations. • The accounting systems will be maintained to monitor expenditures and revenues on a monthly basis with thorough analysis and adjustment of the biennium budget as appropriate. • The accounting system will provide monthly information about cash position and investment performance. • The City will seek to meet all standards to obtain the Certificate of Achievement for Excellence in financial reporting from the Government Finance Officers Association (GFOA) annually. Budgetary Policies • The budget committee will be appointed in conformance with state statutes. The budget committee's chief purpose is to review the city manager's proposed budget and approve a budget and maximum tax levy for City Council consideration. The budget committee may consider and develop recommendations on other financial issues as delegated by the City Council. • "The Budget Committee Reference Guide" is part of this document and it is Attachment 3 (three). • The Citizens' Budget Committee services an important service with high visibility within our Ashland community, and it contributes to the community's mood, tone of communications and behavior. It is important that all members are aware of their leadership roles and community influence. The following are the ground rules for the meetings: ■ Keep an open mind ■ Be respectful ■ Don't interrupt ■ Stay on topic ■ It is ok to disagree Adopted by Resolution No. 2023-09 (May 16, 2023) City of Ashland Financial Management Policies ■ Raise your hand to speak ■ Allow others to speak before speaking again ■ Be prepared ■ Support the relationship to and with the city (fiduciary responsibility) The City will finance all current expenditures with current revenues. The City will avoid budgetary practices that balance current expenditures through the obligation of future resources. Appropriation of fund balance or retained earnings will be solely for the purpose of one-time expenditures such as capital projects. • The City budget will support City Council goals and priorities and the long-range needs of the community. In contrast to the line -item budget that focuses exclusively on items to be purchased (such as supplies and equipment), the City will emphasize the use of goals and programs to: Structure budget choices and information in terms of programs or operating units and their related work activities and impact on constituents and the community, 2. Provide information on what each program or operating unit is committed to accomplish in long-term goals and in short-term objectives, and 3. Measure the degree of achievement of program or operating unit objectives (performance measures). • The City will include multi -year projections in the budget document of at least three years beyond the biennium. • To maintain fund integrity, the City will manage each fund as an independent entity in accordance with applicable statutes, generally accepted accounting principles, and government finance industry standards. • The City will allocate direct and administrative costs to each fund based upon the cost of the other fund providing these services to the recipient fund. The City will recalculate the cost of administrative services regularly to identify the impact of inflation and other cost increases. • If the City should receive unbudgeted revenues net of corresponding or related expenditures or proceeds from the sale of assets within any governmental fund, the City will transfer not less than 20 percent of the gain to the Reserve Fund, restrict not less than 10 percent for payment of future long-term liabilities, and designate no less Adopted by Resolution No. 2023-09 (May 16, 2023) City of Ashland Financial Management Policies than 20 percent to fund capital projects. If the City should receive unbudgeted revenues net of corresponding or related expenditures or proceeds from the sale of assets within any enterprise or internal service fund, the City will commit not less than 10 percent of the gain to net earnings, restrict not less than 10 percent for payment of future long- term liabilities, and designate no less than 20 percent to fund capital projects. • The City will seek to meet all standards for each adopted budget to obtain the Award for Distinguished Budget Presentation from the Government Finance Officers Association. Fund Balance Policy General Fund The General Fund accounts for all financial resources not accounted for in other funds. Resources include working capital carryover, taxes, licenses and permits, intergovernmental revenue, fines and forfeitures, charges for services, miscellaneous revenues, and inter -fund transfers. Expenditures are for Administration, Human Resources, Legal, Finance, Public Works Support and Facilities, Parks, Innovation and Technology Information Systems, City Recorder, Social Services, Economic and Cultural Development, Police Department, Municipal Court Department, Fire and Rescue Department, City Band, Cemeteries, and the Department of Community Development and payments for services provided by other funds. This fund uses the modified accrual method of accounting. • The General Fund will maintain an unrestricted and undesignated balance no less than 16.67% percent of the average annual expenditures of the prior three years. This is the minimum needed to maintain the City's credit worthiness and to adequately provide for economic uncertainties and cash flow needs. • At such time as the unrestricted and undesignated balance exceeds 50 percent of the average annual expenditures of the prior three years, the City will transfer not less than 20 percent of the overage to the Reserve Fund, restrict not less than 10 percent for payment of future long-term liabilities, and designate no less than 20 percent to fund capital projects. • If at any time the unrestricted and undesignated balance should fall below 16.67% percent of the average annual expenditures of the prior three years, the City will work to restore the balance in no less than three years with not less than 25 percent of the shortfall being restored within each year. • The City will budget a contingency appropriation to provide for unanticipated non- recurring expenditures. The minimum contingency will be maintained at not less than 3 Adopted by Resolution No. 2023-09 (May 16, 2023) City of Ashland Financial Management Policies percent of the average annual operating expenditures over the prior three years. Special Revenue Funds Special Revenue funds account for the proceeds of specific sources that are legally restricted to expenditures for specified purposes. Special Revenue funds account for transactions using the modified accrual method of accounting. Reserve Fund. This fund is used to set aside funds to protect services and to stabilize the budget, and to meet any costs that may arise in the future from unexpected events. As established by Resolution 2010-18, amended by Resolution 2020-09, and clarified by Resolution 2020-26. The resolution is a part of this document and is Attachment 4 (four). Community Development Block Grant Fund. This fund was established in 1994-1995. The fund accounts for the Block Grant and related expenditures. • A fund balance policy is not needed since this fund works on a reimbursement basis and proceeds are restricted by federal guidelines. Street Fund. Revenues are from the state road tax, grants, franchise fees, charges for services and miscellaneous sources. Expenditures are for the maintenance, repair, and surfacing of streets. The Street Fund will maintain a committed balance of annual revenue of at least 15 percent of the average annual expenditures of the prior three years. This is the minimum needed to maintain the City's credit worthiness and to adequately provide for economic uncertainties and cash flow needs. If at any time the unrestricted and undesignated balance should fall below 15 percent of the average annual expenditures of the prior three years, the City will work to restore the balance in no less than three years with not less than 25 percent of the shortfall being restored within each year. The City will budget a contingency appropriation to provide for unanticipated expenditures of a nonrecurring nature. The minimum contingency will be maintained at not less than 3 percent of annual operating expenditures. SDC Street Fund. The System Development Charges for Transportation are in this fund. System Development Charges are a one-time fee imposed on new development to equitably recover the cost of expanding infrastructure capacity to serve new customers. Tourism Fund. Revenues are from the Transient Lodging Tax and expenditures are restricted by ORS 320.350. Housing Fund. Revenue is earmarked in this fund to affordable housing by Ordinance and the Adopted by Resolution No. 2023-09 (May 16, 2023) City of Ashland Financial Management Policies dedicated funds are to be used to support affordable housing priorities through receipt of donations and dedicated revenue streams, including but not limited to donations, grants, sale of surplus City property, or any other revenue sources approved by the Ashland City Council or the people of Ashland. Airport Fund. Revenues are from airport leases and fuel sales. Expenditures are for airport operations. • The Airport Fund will maintain a committed balance of annual revenue of at least 10 percent of the average annual expenditures of the prior three years. This is the minimum needed to maintain the City's credit worthiness and to adequately provide for economic uncertainties and cash flow needs. • If at any time the unrestricted and undesignated balance should fall below 10 percent of the average annual expenditures of the prior three years, the City will work to restore the balance in no less than three years with not less than 25 percent of the shortfall being restored within each year. • No portion of the Airport fund balance is restricted for specific uses. • Many of the Airport assets have restrictions placed on them by the Federal Aviation Administration. None of the current revenues are pledged to outside lenders. • The City will budget a contingency appropriation to provide for unanticipated non- recurring expenditures. The minimum contingency will be maintained at not less than 3 percent of annual operating expenditures. Capital Projects Funds Capital improvement funds are established to account for financial resources that are used for the acquisition or construction of major capital facilities (other than those financed by Enterprise Funds, Internal Service Funds, Special Assessment Funds and Trust Funds). Capital projects funds use the modified accrual method of accounting. Capital Improvements Fund. This fund accounts for revenues from grants, unbonded assessment payments, and other sources, and will account for the construction of special local improvements, usually streets, with revenues from short-term borrowing and unbonded assessments. Expenditures are for construction, property and equipment acquisition and replacement, improvements and related purposes including facility maintenance, and the repayment of short-term debt principal and interest incurred in financing improvements. The purpose is to accumulate funds prior to a large construction project; therefore, there is no minimum or maximum fund balance. • The City will budget a contingency appropriation to provide for unanticipated non -recurring expenditures. The minimum contingency will be maintained at not less than 3 percent of Adopted by Resolution No. 2023-09 (May 16, 2023) City of Ashland Financial Management Policies annual operating expenditures. Parks Capital Improvements Fund. The Parks Capital Projects Fund is managed by the Ashland Parks & Recreation Commission per City Charter. This fund is used to account for resources from grants and inter -fund transfers that are to be expended for major park renovations. The purpose is to accumulate funds prior to a large construction project; therefore, there is no minimum or maximum fund balance. SDC Parks Fund. The System Development Charges for Parks are in this fund. System Development Charges are a one-time fee imposed on new development to equitably recover the cost of expanding infrastructure capacity to serve new customers. Debt Service Funds Debt Service Funds account for the accumulation of resources for, and the payment of, general long-term debt principal and interest. Expenditures and revenues are accounted for using the modified accrual method of accounting. All bond issues and notes are separated in the accounting system. All of the monies within the Debt Service fund are restricted for Debt service until the specific debt is repaid in full. ORS prohibits cities from borrowing this money for any other purpose. Enterprise Funds Enterprise funds account for the following operations: (a) those that are financed and operated in a manner similar to private business enterprise, where the intent of the governing body is that the costs (expenses, including depreciation) of providing goods and services to the general public on a continuing basis be financed or recovered primarily through user charges; or (b) those where the governing body has decided that periodic determination of revenues earned, expenses incurred, and/or net income is appropriate for capital maintenance, public policy, management control, accountability, or other purposes. Enterprise funds use full accrual basis of accounting for financial statement presentations. However, the enterprise activities use a modified accrual basis of accounting for budgetary purposes. This assures budgetary compliance with such expenditures as capital construction and acquisition, as well as debt principal transactions. Water Fund. This fund accounts for water operations. Revenues are from sales of water, other charges for services, and miscellaneous sources. Expenditures are for operations, conservation programs, capital construction, and retirement of debt. The Water Fund will maintain an unrestricted and undesignated balance of at least 25 percent of the average annual expenditures of the prior three years, in addition to any amounts held to comply with debt convenants or legal requirements. This is the minimum Adopted by Resolution No. 2023-09 (May 16, 2023) City of Ashland Financial Management Policies needed to maintain the City's credit worthiness and to adequately provide for economic uncertainties and cash flow needs. If at any time the unrestricted and undesignated balance should fall below 25 percent of the average annual expenditures of the prior three years, the City will work to restore the balance in no less than three years with not less than one quarter of the shortfall being restored within each year. The City will budget a contingency appropriation to provide for unanticipated non- recurring expenditures. The minimum contingency will be maintained at not less than 3 percent of annual operating expenditures. SDC Water Fund. The System Development Charges for Water are in this fund. System Development Charges are a one-time fee imposed on new development to equitably recover the cost of expanding infrastructure capacity to serve new customers. Wastewater Fund. This fund accounts for wastewater treatment and collection. Revenues are from charges for services and taxes. Expenditures are for operations, capital construction, and retirement of debt. • The Wastewater Fund will maintain an unrestricted and undesignated balance of at least 25 percent of the average annual expenditures of the prior three years, in addition to any amount required to comply with debt convenants or legal requirements. This is the minimum needed to maintain the City's credit worthiness and to adequately provide for economic uncertainties and cash flow needs. If at any time the unrestricted and undesignated balance should fall below 25 percent of the average annual expenditures of the prior three years, the City will work to restore the balance in no less than three years with not less than one quarter of the shortfall being restored within each year. The City will budget a contingency appropriation to provide for unanticipated non- recurring expenditures. The minimum contingency will be maintained at not less than 3 percent of annual operating expenditures. SDC Wastewater Fund. The System Development Charges for Wastewater are in this fund. System Development Charges are a one-time fee imposed on new development to equitably recover the cost of expanding infrastructure capacity to serve new customers. Electric Fund. The Electric Fund accounts for the distribution of purchased electricity according to standards set forth by the Federal Energy Regulatory Commission. Revenues are from sale of electricity and other charges for services and intergovernmental revenues. Expenditures are for related operations. Utility operations include wholesale power purchases, operating expenses, energy conservation incentives, capital outlay, retirement of debt, franchise tax, and Adopted by Resolution No. 2023-09 (May 16, 2023) City of Ashland Financial Management Policies related purposes. • The Electric Fund will maintain an unrestricted and undesignated balance of at least 25 percent of the average annual expenditures of the prior three years, in addition to any amount required to comply with debt convenants or legal requirements. This is the minimum needed to maintain the City's credit worthiness and to adequately provide for economic uncertainties and cash flow needs. • Debt service reserves are included in the Electric Fund balance. This portion of the Electric Fund balance is restricted and shall not be used in determining the minimum fund balance. • If at any time the unrestricted and undesignated balance should fall below 25 percent of the average annual expenditures of the prior three years, the City will work to restore the balance in no less than three years with not less than 25 percent of the shortfall being restored within each year. • The City will budget a contingency appropriation to provide for unanticipated non- recurring expenditures. The minimum contingency will be maintained at not less than 3 percent of annual operating expenditures. Telecommunications Fund. The Telecommunications Fund accounts for the revenues and expenditures of the Ashland Fiber Network. • The Telecommunications Fund will maintain a minimum balance of 20 percent of the average annual expenditures of the prior three years, in addition to any amount required to comply with debt convenants or legal requirements. • If at any time the unrestricted and undesignated balance should fall below 20 percent of the average annual expenditures of the prior three years, the City will work to restore the balance in no less than three years with not less than one quarter of the shortfall being restored within each year. • Debt service reserves are included in the portion of the Telecommunications Fund determining the minimum fund balance. Telecommunications Fund balance. This balance is restricted and shall not be used in • The city will budget a contingency appropriation to provide for unanticipated non- recurring expenditure. The minimum contingency will be maintained at not less than 3 percent of annual operating expenditures. Stormwater Fund. Revenues are from charges for services and miscellaneous sources. Expenditures are for the maintenance, repair, and construction of storm drains. • The Stormwater Fund will maintain a committed balance of annual revenue of at least 20 Adopted by Resolution No. 2023-09 (May 16, 2023) City of Ashland Financial Management Policies percent of the average annual expenditures of the prior three years. This is the minimum needed to maintain the City's credit worthiness and to adequately provide for economic uncertainties and cash flow needs. If at any time the unrestricted and undesignated balance should fall below 20 percent of the average annual expenditures of the prior three years, the City will work to restore the balance in no less than three years with not less than one quarter of the shortfall being restored within each year. The City will budget a contingency appropriation to provide for unanticipated expenditures of a nonrecurring nature. The minimum contingency will be maintained at not less than 3 percent of annual operating expenditures. SDC Stormwater Fund. The System Development Charges for Stormwater are in this fund. System Development Charges are a one-time fee imposed on new development to equitably recover the cost of expanding infrastructure capacity to serve new customers. Internal Service Funds Internal service funds account for the financing of goods or services provided by one department or agency to other departments or agencies of the governmental unit, or to other governmental units, on a cost reimbursement basis. Internal service funds use full accrual accounting methods for financial statement presentations. However, the internal service funds use a modified accrual basis of accounting for budgetary purposes. This assures budgetary compliance with such expenditures as capital construction and acquisition as well as debt principal transactions. Insurance Services Fund. Revenues in this fund are from service charges from other departments, investment income, and insurance retrospective rating adjustments. Expenditures are for insurance premiums, self-insurance direct claims, and administration. • The Insurance Services Fund will maintain an unrestricted and undesignated balance of 50% of the average annual expenses of the prior five years or $500,000 whichever is more. This is the minimum needed to maintain the City's insurance programs and provide for uninsured exposures. • If at any time the unrestricted and undesignated balance should fall below $500,000, the City will work to restore the balance in no less than two years with not less than one third of the shortfall being restored within each year. • No portion of the Insurance Services Fund balance is legally restricted for specific uses. • The City will budget a contingency appropriation to provide for unanticipated non- recurring expenditures. The minimum contingency will be maintained at not less than Adopted by Resolution No. 2023-09 (May 16, 2023) City of Ashland Financial Management Policies 3 percent of annual operating expenditures. Equipment Fund. This fund is used to account for the maintenance and replacement of the City fleet of vehicles and specified equipment. Revenues are from equipment rental and replacement charges. Expenditures are for personnel, materials and services, and capital outlay. This fund is divided into two functions: equipment maintenance and equipment replacement. The purpose of the equipment replacement function is to accumulate adequate funds to replace equipment. This replacement schedule is updated annually. The Equipment Fund will maintain a minimum balance calculated to sufficiently fund equipment replacement as determined by use of the replacement value schedule and not less than 20 percent of the average annual operating expenditures of the prior three years. • If at any time the unrestricted and undesignated balance should fall below the sum of 20 percent of the average annual operating expenditures of the prior three years and 30 percent of the replacement value of in-service equipment and vehicles, the City will work to restore the balance in no less than three years with not less than one quarter of the shortfall being restored within each year. No portion of the Equipment fund balance is legally restricted for specific uses. The City rents equipment at rates that include the replacement cost of the specific piece of equipment. The City will budget a contingency appropriation to provide for unanticipated non- recurring expenditures. The minimum contingency will be maintained at not less than 3 percent of annual operating expenditures. Trust and Agency Funds Trust and agency funds account for assets held by a governmental unit in a trustee capacity or as an agent for individuals, private organizations, or governmental units, and/or other funds. These include (a) expendable trust funds, (b) non -expendable trust funds, (c) pension trust funds, and (d) agency funds. Cemetery Trust Fund. The Cemetery Trust Fund is a non -expendable trust fund that uses the accrual basis of accounting. Revenues are from interest income and perpetual care service charges on cemetery operations. Expenditures are for the repurchase of plots and transfers of earnings to the cemetery fund for operations. • No minimum fund balance policy is recommended. Adopted by Resolution No. 2023-09 (May 16, 2023) City of Ashland Financial Management Policies Revenues • The City will estimate its annual revenues by an objective, analytical process. Because most revenues are sensitive to conditions outside the City's control, estimates will be conservative. • The City will make every effort to maintain a diversified and stable revenue base to protect its operation from short-term fluctuations in any one revenue source. • The City will establish charges for enterprise funds that fully support the total cost of the enterprise. Utility rates will be reviewed annually. Rates will be adjusted as needed to account for major changes in consumption and cost increases. • The City will identify user fees to the direct beneficiaries of City services to recover all of the full cost of providing that service and compare with existing rates. All user fees will be reviewed biannually to ensure that direct and overhead costs are recovered in the percentage approved by City Council. • To the extent practicable, new development shall pay necessary fees to meet all identified costs associated with that development. • The City will work aggressively to collect all delinquent accounts receivable. When necessary, collection procedures will include termination of service, submission to collection agencies, foreclosure, and other available legal remedies. Expenditures • The City will provide employee compensation that is competitive with comparable public jurisdictions within the relative recruitment area. Estimated wage increases and changes in employee benefits will be included in the proposed budget under Personnel Services. • The City is committed to maintaining and improving the productivity of its staff by providing a proper working environment, adequate equipment and supplies, and appropriate training and supervision. • A Social Service appropriation will be included in the proposed General Fund Budget. This appropriation will increase or decrease relative to the overall General Fund revenues. • Tourism appropriation will be included in the proposed Tourism Fund Budget. This appropriation will increase or decrease relative to the overall Transient Lodging Tax Revenues. Adopted by Resolution No. 2023-09 (May 16, 2023) City of Ashland Financial Management Policies Purchasina • The City will purchase materials, supplies, and equipment through a competitive process that provides the best product for the least cost. • The City will adhere to all State of Oregon and local requirements for purchasing goods and services. The City will also review policies and procedures at least annually for adherence with industry best practices. Capital • The City will provide for adequate maintenance of equipment and capital assets. The City will make regular contributions to the Equipment Replacement Fund and the City Facilities budget to ensure that monies will be available as needed to replace City vehicles and facilities. • Future operating costs associated with new capital improvements will be itemized, projected, and included in the long-term budget forecast. • The City will determine and use the most appropriate method for financing all new capital projects. • Special accounts dedicated for capital improvements will be segregated in the accounting system and used only for the intended capital purposes. • The Capital Improvement Plan (CIP) will encourage a level capital replacement schedule and anticipate future capital needs. The CIP will present identified needed capital projects for a minimum of six years into the future and include known major projects requiring debt obligations to support them for a minimum of fifteen years into the future. Debts • The City will not use long-term borrowing to finance current operations. • Capital projects, financed through bond proceeds, will be financed for a period not to exceed the useful life of the project. • Whenever possible, enterprise debt will be self-supporting. Regardless of the type of debt issued, the City will establish a one-year reserve for all self- supporting debt. • The City will seek to maintain level debt service payments over the duration of an issue and consider the level of debt obligations across funding sources when recommending types and amounts of debt instruments. Adopted by Resolution No. 2023-09 (May 16, 2023) City of Ashland Financial Management Policies • The City will keep the final maturity of general obligation bonds at or below 20 years, with the exception of water supply and land acquisition that will be limited to 30 years. • The City will maintain a debt coverage ratio, i.e. net revenue to debt service of at least 125% for every debt issue. • The State of Oregon limits non -self-supporting obligation debt to three percent of the real market value of all taxable property within the City boundaries. • The City will seek to maintain and improve its bond rating to minimize borrowing costs and to ensure its access to credit markets. • The City will maintain good communications with bond rating agencies about its financial condition. Risk Management The City will provide an active risk management program that reduces human suffering and protects City assets through loss prevention, insurance, and self- insurance. The risk management program will be reviewed at least annually to assure levels of primary and secondary coverage are consistent with City priorities and needs. The risk management function will conduct regular meetings of the City Safety Committee, including representatives from each operating department, to review incidents and consider activities or initiatives to reduce the City's loss experience and to enhance safety of City human and physical resource. Adopted by Resolution No. 2023-09 (May 16, 2023) Attachment #2 City of Ashland Statement of Resources, Requirements, and Changes in Fund Balance as of May 31, 2023 670 Water Fund Charges for Services - Rates Charges for Services - Misc. Service Fees System Development Charges Interest on Investments Miscellaneous Other Financing Sources Total Revenues and Other Sources Public Works - Conservation Public Works - Water Supply Public Works - Water Supply Debt Public Works - Water Distribution Public Works - Water Distribution Debt Public Works - Water Treatment Public Works - Water Treatment Debt Public Works - Reimbursement SDC's Public Works - Improvement SDC's Public Works - Debt SDC's Debt Service Transfer Out (General Fund to AFR) Contingency Total Expenditures and Other Uses Excess(Deficiency) of Revenues and Other Sources over Expenditures and Other Uses Beginning Fund Balance Ending Fund Balance Reconciliation of Fund Balance: Restricted and Committed Funds Unassigned Fund Balance Budget to Actual Fiscal Year 2023 Percent Fiscal Year 2023 2nd Year of Biennial Collected I 2nd Year Actuals Budget Expended Current Fiscal Year Actual to Actual Year -over -Year Change Fiscal Year 2022 Fiscal Year 2022 Year End -of -Year To -Date Actuals Actuals Prior Fiscal Year Actual Percent Collected I Expended 5 7.728,916 S 8,840,000 87.4% 100.5% $ 7,686,662 $ 8,399,651 91.5% 39,598 90.000 44.0% 64.6% 61,254 67,573 90.6% 142,451 150,000 95.0% 58.8% 242,151 204,411 118.5% 271,998 92,800 293.1% 481.9% 56,439 65,754 85.8% 264 26,000 1.0% 7.4% 3,577 4,104 87.2% 1,366,794 17,545,800 7.8% WA N/A 9,550,022 26,744,600 35.7% 118.6% 8,050,081 8,741,494 92.1 % 97,817 283,670 34.5 % 86.1 % 113,599 127,393 89.2 % 827,302 4,121,215 20.1 % 79.4% 1,042,532 1,142,413 91.3% 127,843 127,776 100.1 % 100.1 % 127,775 127,775 100.0% 3,428,722 4,867,942 70.4% 102.0% 3,360,064 3,686,295 91.2% 269,195 269,197 100.0% 100.7% 267,260 267,260 100.0 % 3,320,195 15,555,295 21.3% 261.2% 1,271,167 1,411,805 90.0% 73,195 75,195 97.3% 100.7% 72,662 72,662 100.0% 150,000 0.0 % WA - - NIA 353,936 2,131,200 16.6 % 196.1 % 180,458 269,059 67.1 % 33,633 33,390 100.7% 100.7% 33,390 33,390 100.0% 180,574 0.0 % WA - - N/A 50,000 50,000 100.0% 100.0% 50,000 50,000 100.0% - 232,004 0.0 % WA - - N/A 8,581.839 28,077,458 30.6% 131.6% 6,518,908 7,188,052 90.7% 968.183 (1,332,858) 172.6% 63.2% 1,531,174 1,553,442 98.6% 14,299,291 11,518,403 124.1 % 112.2% 12,745,849 12,745,849 100.0% $ 15,267,473 $ 10,185,545 149.9% 106.9% $ 14,277,024 $ 14,299,291 99.8% 1,162,197 $ 14,105,276 14 d,srmn City of Ashland Statement of Resources, Requirements, and Changes in Fund Balance as of May 31, 2023 Budget to Actual Fiscal Year 2023 Percent Actual to Actual Fiscal Year 2022 Actual Percent Fiscal Year 2023 2nd Year of Biennial Collected I Year -over -Year Fiscal Year 2022 Year End -of -Year Collected I 2nd Year Actuals Budget Expended Change To -Date Actuals Actuals Expended Current Fiscal Year Prior Fiscal Year 675 Wastewater Fund Taxes $ $ NIA 0.0% $ 38 $ 38 98.9% Charges for Services - Rates 5,840,422 6,040,000 96.7% 101.4% 5,762,115 6,301,095 91.4% Charges for Services - Misc. Service Fees - 150,000 0.0% 0.0% (3,174) (3,174) 100.0% System Development Charges 117,689 - NIA 86.9 % 135,489 91,772 147.6% Interest on Investments 140,589 86,700 162.2% 421.5% 33,357 38.811 85.9% Other Financing Sources 2,123,852 2,858,650 74.3% 541.7 % 392,037 672,428 58.3% Total Revenues and Other Sources 8,222,614 9,135,350 90.0% 130.1 % 6,319,862 7,100,970 89.0% Public Works - Wastewater Collection 2,118,537 2,793,623 75.8 % 102.0 % 2,077,287 2,259,032 92.0 % Public Works - Wastewater Collection Debt 45,256 46,057 98.3% 98.3% 46,056 46,056 100.0% Public Works- Wastewater Treatment 6,642,746 5,714,038 116.3% 215.5% 3,082,179 3,734,655 82.5% Public Works - Wastewater Treatment Debt 128.251 128,797 99.6 % 99.6% 128,797 128,797 100.0% Public Works- ImprovementsSDC's 119,736 1,331,350 9.0% 82.2% 145,662 165,385 88.1% Contingency 184,274 0.0% NIA NIA Total Expenditures and Other Uses 9,6§17527 10,198,139 88.8 % 165.2% 5,479.981 6,333,925 86.5 % Excess(Deficiency) of Revenues and Other Sources over Expenditures and Other Uses (831,912) (1,062.789) 21.7% -99.1% 839,881 767,045 109.5% Beginning Fund Balance 8,336,733 5,932,421 140.5% 110.1% 7,569,688 7,569,688 100.0% Ending Fund Balance $ 7,504,821 $ 4,869,632 154.1% 89.2% $ 8,409,569 $ 8,336,733 100.9% Reconciliation of Fund Balance: Restricted and Committed Funds 2,228,374 Unassigned Fund Balance $ 5,276,447 City of Ashland Statement of Resources, Requirements, and Changes in Fund Balance as of May 31, 2023 Budget to Actual Fiscal Year 2023 Percent Actual to Actual Fiscal Year 2022 Actual Percent Fiscal Year 2023 2nd Year of Biennial Collected I Year -over -Year Fiscal Year 2022 Year. End -of -Year Collected I 2nd Year Actuals Budget Expended Change To -Date Actuals Actuals Expended Current Fiscal Year Prior Fiscal Year 680 Stormwater Fund Charges for Services - Rates $ 733,800 $ 769,600 95.3 % 100.9 % $ 727,148 $ 793,847 91.6 % System Development Charges 13,567 35,000 38.8% 57.0 % 23,789 33,287 71.5 % Interest on Investments 36,537 10,000 365.4% 473.0% 7,725 8,992 85.9% Total Revenues and Other Sources 783,904 814,600 96.2% 103.3 % 758,663 836,126 90.7% Public Works- Storm Water Operations 601,263 1,102,538 54.5% 89.4% 672,871 722,578 93.1% Public Works - Storm Water Operations Debt 11,350 11,550 98.3 % 98.3 % 11,550 11,550 100.0% Public Works - Storm Water SDC's - 275,000 0.0% 0.0% 12,120 12,120 100.0% Contingency - 37,173 0.0% WA - - N/A Total Expenditures and Other Uses 612,613 1,426,261 43.0 % 88.0 % 696,541 746,248 93.3 % Excess(Deficiency) of Revenues and Other Sources over Expenditures and Other Uses 171,291 (611,661) 128.0% 275.7% 62,122 89,878 69.1% Beginning Fund Balance 1,867,493 856,106 218.1% 105.1% 1,777,615 1,777,615 100.0% Ending Fund Balance $ 2,038,784 $ 244,445 834.0% 110.8 % $ 1,839,737 $ 1,867,493 98.5% Reconciliation of Fund Balance: Restricted and Committed Funds (49,085) Unassigned Fund Balance $ 1,989,699 1. Yry]3 FYii Frercul Pggnu,e lue OE's LNe 6/ivmn 16 City of Ashland Statement of Resources, Requirements, and Changes in Fund Balance as of May 31, 2023 Budget to Actual Fiscal Year 2023 Percent Actual to Actual Fiscal Year 2022 Actual Percent Fiscal Year 2023 2nd Year of Biennial Collected I Year -over -Year Fiscal Year 2022 Year. End -of -Year Collected I 2nd Year Actuals Budget Expended Change To -Date Actuals Actuals Expended Current Fiscal Year Prior Fiscal Year 690 Electric Fund Intergovernmental $ 12,618 $ 210,000 6.0% 25.1% $ 50,308 $ 50,308 100.0% Charges for Services - Rates 16,422,694 18,408,531 89.2% 101.9% 16,109,765 17,375,916 92.7% Charges for Services - Misc. Service Fees 376,677 268,000 140.6 % 121.8 % 309,355 316,209 97.8 % Interest on Investments 101,796 25,000 407.2% 657.0% 15,494 18,608 83.3% Miscellaneous 334,689 302,000 110.8% 558.0% 59,979 63,231 94.9% Total Revenues and Other Sources 17,248,474 19,213,531 89.8% 104.3% 16,544,900 17,824,272 92.8% Administration -Conservation 767,811 1,122,936 68.4% 111.0% 691,415 762,029 90.7% Electric -Supply 4,891,141 7,738,500 63.2% 76.9% 6,356,989 6,775,000 93.8% Electric -Distribution 8,162,220 8,152,647 100.1% 116.6% 6,999,751 7,656,603 91.4% Electric - Transmission 755,811 1,127,500 67.0% 83.3% 907,184 1,002,989 90.4% Debt Service - 243,663 0.0% 0.0% 21,850 21,850 100.0% Contingency - 551,557 0.0% N/A - - N/A Total Expenditures and Other Uses 14,576,984 18,936,803 77.0 % 97.3 % 14,977,189 16,218,471 92.3% Excess(Deficiency) of Revenues and Other Sources over Expenditures and Other Uses 2,671,490 276,728 965.4% 170.4% 1,567,711 1,605,801 97.6% Beginning Fund Balance 5,023,947 4,963,035 101.2% 147.0% 3,418,146 3,418,146 100.0% Ending Fund Balance $ 7,695,437 $ 5,239,763 146.9% 154.3% $ 4,985,857 $ 5,023,947 99.2% Reconciliation of Fund Balance: Restricted and Committed Funds - Unassigned Fund Balance $ 7,695,437 �. wz+rrn ti awirn u.oe. um 17 visx� City of Ashland Statement of Resources, Requirements, and Changes in Fund Balance as of May 31, 2023 695 Telecommunications Fund Charges for Services - Rates Charges for Services - Misc. Service Fees Interest on Investments Miscellaneous Total Revenues and Other Sources Personnel Services Materials 8 Services Capital Outlay Debt -Transfer to Debt Service Fund Contingency Total Expenditures and Other Uses Excess(Deficiency) of Revenues and Other Sources over Expenditures and Other Uses Beginning Fund Balance Ending Fund Balance Reconciliation of fund Balance: Restricted and Committed Funds Unassigned Fund Balance Budget to Actual Fiscal Year 2023 Percent Actual to Actual Fiscal Year 2022 Actual Percent Fiscal Year 2023 2nd Year of Biennial Collected I Year -over -Year Fiscal Year 2022 Year. End -of -Year Collected 1 2nd Year Actuals Budget Expended Change To -Date Actuals Actuals Expended Current Fiscal Year Prior Fiscal Year $ 2,584,310 $ 2,847,836 90.7% 101.2% $ 2,553.518 $ 2,780,392 91.8% - 5,100 0.0% N/A - - N/A 49,821 12,330 404.1% 542.9% 9,177 10,949 84.6% WA N/A 456 456 100.1% 2,634,131 2,865,266 91.9% 102.8% 2,563,151 2,791,697 91.8% 670,809 919,425 73.0% 103.2% 649,822 717,620 90.6% 924,691 1,148,608 80.5% 103.3% 894,893 982,284 91.1% 36,813 126,250 29.2% N/A - - N/A 473,067 516,073 91.7% 99.5% 475,581 518,816 91.7% - 10,936 0.0% WA N/A 2,105,380 2,721,292 77.4% 104.2% 2,020,296 2,218,720 91.1% 528,751 143,974 367.3% 97.4% 542,855 572,977 94.7,E 2,683,911 2,030,348 132.2% 127.1% 2,110,934 2,110,934 100.0% $ 3,212,662 $ 2,174,322 147.8% 121.1% $ 2,653,789 $ 2,683,911 98.9% $ 3,212,662 i i. uMx.rrn Fpw a.om W n w.om vm 18 drszmx