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HomeMy WebLinkAbout2018-02-27 Water Advisory Committee Agenda PacketASHLAND WATER ADVISORY COMMITTEE February 27, 2018 AGENDA Im CALL TO ORDER: 4:00 PM, Siskiyou Room, 51 Winburn Way Ashland, OR II. ANNOUNCEMENTS III. APPROVAL OF MINUTES: October 24, 2017 IV. PUBLIC FORUM Vo OLIO BUSINESS A. T.I.D. Canal Piping Project Update B. Water Treatment Plant Evaluation Update VI. NEW BUSINESS A. Cross Connection Control Program Presentation 'VrII. 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CALL TO ORDER Williams called the meeting to order at 4.03 PM Committee Members Present: Pat Acklin, Alex Amarotico, Joe Graf, Kate Jackson, Rich Miller, Don Morris, Michael Morris (Council liaison), Donna Rhee, John Williams (chair) Committee Members Absent: Lesley Adams, Darrell Boldt, Michael Morrison Staff present: Paula Brown, Scott Fleury, Steve Walker, Kevin Caldwell, Julie Smitherman, Jessica Bain, Tara Kiewel Staff absent: Greg Hunter Consultants: Jeff Ballard P.E. (RH2), Lisa Maddaus P.E. (Maddaus Water Management) ANNOUNCEMENTS None APPROVAL OF MINUTES September 26, 2017 Committee Members AmaroticolAcklin mis to approve minutes as. All ayes. Minutes approved. Brown updated the committee about the request for proposal (RFP) for the water treatment plant study that was going to be brought to this meeting. In lieu of an RFP Brown is working directly with RH2 to negotiate a proposal to bring to the committee in January or February with cost estimates. PUBLIC FORUM None WATER MASTER PLAN — CONSERVATION MODEL Julie Smitherman, Water Conservation Specialist and Lisa Maddaus P.E., Maddaus Water Management presented a Water Efficiency Program review. See attached presentation. Brown asked for the reasoning behind sun setting the lawn replacement program. Smitherman explained that the community is being saturated and anyone interested in this program will have participated by 2020. The lawn replacement program is high cost for both the City and customers similar savings could be found from an irrigation conversion program. Acklin questioned why the Hot Water on Demand measure did not make it into the B Category of programs to implement. Smitherman said this program had minimal savings. Graf mentioned if we significantly reduce the amount of water going into the sewer what does that do to the amount of water going into Bear Creek. Smitherman said we need to make sure we don't have any unintended Ashland Water Advisory Ad -Hoc Committee (AWAC) October 24, 2017 Page 1 of 3 ASHLAND water Advisory Committee MINUTES October 24 2017 consequences and we need to look at all sides. Morris added that if are taking less water out of the environment then there is more water in the streams. Williams asked if the projected water demand scenarios included any growth projected for the City. Smitherman explained that there was .50 percent per year of growth calculated and based on a Demographer report from Jackson County. Graf questioned the customer cost numbers for lawn replacement and Smitherman explained that the customer cost range is from $1,000 to $30,000 depending on the size and type of landscape. Brown asked if we had real customer costs for 2015-2016 lawn replacements and Smitherman said she does have those numbers. Brown asked if there was any measure that we didn't select on that list that Maddaus would have recommended. Maddaus said that she would have looked at the customer water use reports and communication education. The trend is for utilities to share more information and analytics on how customers use water in order to make informed decisions on water usage. Maddaus also mentioned the water loss control is a measure she would have recommended. Brown mentioned that if anyone on the committee wants more information on any of the measures and programs that Smitherman could provide the information. Williams asked which programs affect summer usage the most and mentioned the rain catchment program. Smitherman said this program is site specific and size of the tank will determine and drive how much water will be available for the landscape. Smitherman mentioned a grey water program could come in handy for watering trees. Graf asked for clarification regarding the projected water demand scenarios and questioned the overall savings projections and Plan B may not be sufficient. Graf said if we assume due to climate we are going to see significantly lower input of water corning into our watershed or a decrease in storage of snow we will need to save more that this model shows. Smitherman said that we can adjust the model as needed. Maddaus explained that there is a difference between responding to climate change and frequency of flood and drought cycles and this is long rang infrastructure planning and we will also have a drought plan that will be on top of this. Brown mentioned that we had a drought and recession hitting at the same time and that our community responded really well and reduced water usage significantly to meet our goals. Brown believes the demand scenarios model is conservative. Smitherman explained that it is common for communities to see a rebound in water usage after a drought and recessions and asked for the Committees feedback regarding the demand scenario. Miller felt it is a good case that is well thought out and adjustable and that our community is different and responds well. Williams said with the City's Climate Energy Action Plan (LEAP) goals we could probably justify going with the C plan. Williams also mentioned the the City is making and effort to fireproof the town. Smitherman is attending the Wildfire Mitigation Committee meetings and partnering to make sure we are all on the same page. Graf said he thinks the numbers are good for demand in this plan and said he is prepared that we may have to go to Plan C if supply is not meeting demand. Brown said we could put a note in that we should look at Plan C as a goal for the City. Jackson asked about lower income households meeting the climate change goals we have set. Smitherman explained the toilet rebate program as well as the free show heads, faucet aerators, and moisture meters that we Ashland Water Advisory Ad -Hoc Committee (AWAC) October 24, 2017 Page 2 of 3 ASHLAND water Advisory Committee MINUTES October 24 2017 .. . . ......... . .. . ....... . . . do a.r . _ttee . 'ls.... .. ... . . rrnes. den,... give away. This is a really good program, and we get reimbursed by Bonneville for. Brown mentioned that updates to plumbing codes will give savings. There is a measure in Program C for leak repair for low income. Maddaus said that most Communities are most successful when they implement 10-12 measures do and concentrate efforts. AwAC CHARGE Brown asked the Committee to look at the charge and if there was anything that needed to be changed. Brown will be updating Council at the Nov. 0, 2017, Study Session and will go over the history and work of this Committee. Brown told the Committee that the goal is to have the Water Master Plan completed in July and to have a decision on the water plant. The Committee would conclude in July because the charge will have been completed. Brown thanked the Committee and for all of their work on behalf of the City. NOVEMBERIDECEMBER MEETING DATES Brown proposed that the Committee meet again in January. All agreed. Next Committee meeting Jan. 23, 2018 4:00 pm ADJOURNMENT: 5:45 PM Respectfully submitted, Tara K ewel Public Works Administrative Assistant Ashland Water Advisory Ad -Hoc Committee (AWAC) October 24, 2017 Page 3 of 3 i I v ii� 1 �Ylii lil ✓ 4FIN i 9 1I rimi�;l2seara�Fxu. 11P'rJm/!i'UlXl!'f/u �N"`4/p/.1rP70T 1� 4�� rMM rf(G/4 fl 9 M, J 111 Nw, y) Ol f e �Ui GflD ur f I� JMI,PII,A (. 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E \\\ N � \\� «± « ��/ 7 °t \� /�: �� « \� m /j/ ^ {»6 «� � m. + «±y /� \ / m<: « � \` t ^ . »� �ma dc,r ��\ /+7 «:,� \ � /\ \ \/ :� � , : /2� /� / :� vim} /� \ \\/ � »x ?»� ,: < <+. < , Cl-u 0- a E )ao L. a Roam= o )w o 's CITY OF ASHLAND Cross -Connection Control Program A. PURPOSE The purpose of the Cross Connection Control Program is to protect customers of the Ci f of Ashland's water system by eliminating potential sources of contamination resulting from illegal. cross connections. Guidelines established in this program, ensure the requirements are met as identified in the City ofAshland's Municipal Code Chapter 14.05-- water Regulation and Cross Connection. This program shall also comply with the Federal Safe Drinking water Act (P.L. 93--523) and the Oregon. Administrative Rules (Chapter 333-061- 0070) as they pertain to cross connections with the public water supply. 7:)- T)CIT Tr'V City of Ashland Municipal Code Chapter t 4.05 - water Regulation and Cross Connection addresses requirements for restricting and controlling potential cross connections to the City of Ashland's water system.. The City of Ashland shall review this section of the Municipal Code from time to time to assure compliance with cuuent requirements of the State of Oregon Administrative Rules relative to cross connections. All revisions to the City's Cross Connection. Control program shall be reviewed and approved by the Ci.ty's public Works Director and, if required by the City Council, The City of Ashland shall maintain a database of potential direct cross connections with auxiliary water sources used for irrigation such as private wells, streams, and Talent Irrigation (TID) services within the City limits. The database shall be reviewed at least semi-annually. These auxiliary water services will need to be surveyed at least once every five years to monitor potential for direct cross connection to the City water Supply. All other City of Ashland residential property will be surveyed at least once every eight years. City of Ashland non. --residential properties will be surveyed every three years, or when the property is sold or changes managersloviners. City of Ashland Cross Connection Specialists will. conduct inspections for cross connection. compliance. The City of Ashland water Department shall maintain all records of inspections for cross connection program compliance. rFbe City of Ashland water Department shall establish and inaintain information desclibing assemblies and procedures suitable for eliminating potential cross connections to the City of Ashland"s water supply system. Depending on the "Degree of Hazard", any property Bo -turd to be in violation of the cent -requh ements of the City of Ashland Municipal Code for cross connections shall be given. an Water Quality department Tel: 541A88-5353 94 K Mountain Avenue Fax: 541-552-2329 Ashland, OR 97520 TTY: 800 735-2998 appropriate arnowit of tine to correct the violation. Enforcement of the Cross Connection Control Program shall be under the authority of the City of .Ashland Public Works Director, or his designee. All new residential,, commercial and industrial construction plans within the City of .Ashland shall be reviewed by the City of Ashland Building Division for compliance with the Cross Coimection Control program. Existing properties shall be identified according to section "C" of this document. C. EXISTING PROPERTY ASSESSMENT The City of Ashland understands that to get this phase of the program started, we need information. we have elected to acquire this through a survey. A survey shah be sent out to each resident, property owner or tenant within. the City of Ashland. This will include customers outside the city limits, but within the urban growth botmda y, that are served by our -water system. Due to the population of the City of Ashland and our limited staffing, we -understand that we could get overwhelmed with information if we did a mass sailing to every customer within our system.. In order to insure that this does not happen, we have decided to take a phased approach and use the existing twenty --seven (27) water meter routes within the City of Ashland. The initial process will start with areas that we consider "higher ri.sIC'. These would include areas with known or suspected auxiliary water sources for irrigation, such as Talent Irrigation water (TLD), wells, or streams. Information shall be kept in our files, located at 90 North Mountain ,Avenue, Ashland, Oregon, we will record all information gathered from the returned. sup-veys and prioritize each property based on "Degree of Hazard" according to Section D of this documont, Each customer shall then be notified "n writing of the status of their property. This notice shall include a timeline for resolving any issues that may be fotmd during the survey or inspection. D. DEGREE OF HAZARD AND APPROVED AS SEM13LIES Degree of Hazard and Approved Assemblies The City of Ashland recognizes that varying degrees of hazard are caused by different cross - connections. The conditions that identify the "Degree of Hazard" are classified as either; a contamination hazard or pollution hazard. A. "contaminant" is defined as any physical, chemical, biological, or radiological substance or matter in water that creates a health hazard; and, a "pollutant" is defined as a substance that creates an impairment of the quality of the water to a degree which does not create a hazard to the public health, but which does adversely affect the aesthetic dualities of the water. Water Quality ❑epartment Tel: ` 41A88-5353 90 K Mountain Avenue Fax. 541 552 2329 Ashlandf OR 97520 TTY: 800 735-2900 The UnI'versity of Southern. California, Foundation for Cross -Connection Control and Hydraulic Research publishes the Manual of Cross --Connection Control i Qth Edition. USC-FCCCHR also issues "Certificates of Approval" to backflow prevention assemblies that meet manufacturing standards and pass their laboratory and field tests. A list of approved assemblies is available at the City of Ashland's Public works Department. The assemblies, which are permitted, for use in each class of hazard and a description of the classes are as follows: A, Low Degree of Hazard (Non -health hazard due to pollution) If backflow were to occur, the resulting health significance would be limited to minor changes in the aesthetic quality such as taste, odor or color. The foreign substance must be non -toxic and non-bacterial in nature with no significant health effects. The allowed assemblies are: Air gap, non -pressure type vacuum breaker, pressure type vacuum breaker, double check valve assembly and reduced pressure assembly. The City of .Ashland may allow up to 90 days for installation of an approved assembly. B. High Degree of Hazard (Health hazard due to contamination) If backnow were to occur, the resulting effect on the water supply could cause illness or death if corsur-ned by hun3ax.3s. The foreign substance may be toxic to humans either chemically, bacteriological or radiologi cal . Toxicity may result from either sbor t or long-term exposure. The City of Ashland shall notify customer that the cross connection shall be discoimected or removed immediately. At the discretion of the inspector, if an irrigation hazard is identified at the end of an irrigation season and shall not be used until the next irrigation season, the inspector may give additional time to remedy the situation, as long as the hazard is eliminated prior to use of the irrigation service during the next irrigation season. (Example-- TID service that will not get used until the following year) See the following "Table 48" and "Table 49"fiom the Oregon Administrative Rules 333-061- 0070, Cross Connection. Control requirements for further clarification on what devices are approved for installation. All facilities shown on Table 48 are classified as areas with a High "Degree of Hazard", Water Quality Department Tel: 5414 M353 90 N. Mountain Avenue Fax: 544-552 2329 Ashland, OR 97520 TTY: 800 735 29D9 TA-BLE 48 PREMISES REQUHUNG ISOLATION Y AN APPROVE,D AIIR GAP O. REDUCED PrE S ..E PRINCIPLE E OF ASSEMBLY M HAZARD 1. Agricultural (e.g. farms, dairies) . 2. Beverage bottling ,plants" 3. Car gashes 4. Chemical plants 5. Commercial laundries and dry cleaners 6. Premises where both reclaimed and potable grater are used 7. Film processing plants 8. Food processing plants 9. Medical centers (e.g., hospitals, medical clinles, nnrsffig hones, veterinary clu"Iics, dental clinics, blood plasma centers) 10. Premiises with irrigation systems that use the grater supplier's water with chemical additions (e.g., parlus, playgrounds, golf courses, cemeteries, housing estates) 11. Laboratories 12. Metal plating industries 13. Mortuaries 14. Petroleum processing or storage plants 15. Piers and docks 16. Radioactive material processing plants and nuclear reactors Dater Quality Department Tel: 541A88-5353 98 N. Mountain Avenue Fax: 541-552--2329 Ashland, DR 97520 TTY: 809-735 2900 17. Wastewater lift, stations and pumping stations 18. Wastewater treatment plants 19. Premises with piping under pressure for conveying liquids other than potable water and the piping is installed in proximity to potable water .. piping 20. Premises with an auxiliary grater supply that is connected to a potable water supply 21. PrerY ses where the water supplier is denied access or restricted access for Sul -Vey 22. Premises where the water is being treated by the addition of chemical or other additives Refer to OAR 333w061 -0070(8) premise Isolation Requirements. .A. Double Check valve Backflow Prevention ,Assembly could be used if the grater supplier determines there is only a non -health hazard at a beverage bottling plant. TABLE 49 Backflow Prevention Methods Used Foi• Premise Isolation . Degree of Identified Hazard Non -Health Hazard (Pollutant) Health Hazard ontamin .nt) BACKS11PHONAGE OR BACKSIPHONAGE OR 13AC PRESS RE BACKPRESSU E Air Ga Air Gap (AG) Reduced Pressure principle Reduced Pressure principle Back -flow Prevention Assembly (RP) Backflow- Prevention .Assembly (RP) .Reduced pressure Principle --Detector Reduced Pressure Principle -Detector B aelfflow Prevention As sombly B ackfl.ow Prevention Assembly (RPDA) A) Double Check valve B ackfl ow Prevention Assembly (DQ Water Quality Department Tel: 541-488-5353 90 N, Moue VinAvenue Fax:541-552-2329 Ashland, OR 97520 TTY: 809 735 2909 E..ELIN NATION OF CROSS CONNECTIONS When potential cross connections are. found to exist, the owner, his agent, occupant, or tenant will be notified in writing to eliminate and/or disconnect the same within the tinge limit established by the City of Ashland, Degree of protection required and maximum time allowed for compliancewillbe based upon the `{Degree of Hazard" to the public water supply systein. (See appendix A- Partial List of Plumbing Hazards; Appendix B-- Mustrations of Backsiphonage; Appendix C- Illustrations of Backpressure) a. Based upon. recommendation Rom the City of A.sbland, the consumer, or his qualified contractor, is responsible for installing sufficient internal isolation baclflow prevention assemblies and/or methods (i.e., air gap, pressure vacuum breakers, reduced pressure principle backflow prevention assembly, double check valve assembly). b. The owner, his agent, occupant, or tenant shall be required to obtain a Plumbhlg permit for installation of the required Gross connection control assembly. c. In the event that a City of Ashland Cross Connection Specialist does not have sufficient access to every portion of a private water system (i.e., classified research and development facilities; federal government property) to allow a complete evaluation of the "Degree of Hazard" associated with such auxiliary water systems, an approved reduced pressure prinoiple asse-mbly or approved air gap shall be required as a mim'rnurn of protection. d. No person shall fill special use taiA<:s or tankers containing pesticides, fellilizers, other toxic che'rm"cals or their residues from the public water system except at a location equipped with an air gap or an approved reduced pressure principle backfiow prevention assembly properly installed on the public water supply. A . TBEEXPANSION NOTIFICATION Installation of backflow assemblies is required to eliminate potential cross connections due to possible pollution or contamination problems. Installation of these baclow assemblies can., however cause another potential bazard with the customers hot water heater. water; heaters are installed- with a temperature and pressure valve (T&P) which is designed to relieve excessive water temperature or pressure. Also aiding in control of excessive heat and pressure is a condition known as "thermal expansion". Tbemal expansion allows extremely hot water to bacIdlow into water rnam lines, mixing with cold water and dissipating the heat. However, when a backfl.ow prevention assembly is installed on a household water service line, the water cannot go back into the water system. This leaves the T&P valve as the only release route for the overheated water. If the thermostat in the hot water heater becomes defective and allows the water temperature to hicrease to more than 212 degrees Fahrenheit, anal the T&P valve fails, the Tatar QuaI4 Department Tel: 541A88-5353 99 N. Mountain Avenge Fax: 541-552-2329 Ashland, OR 97520 TM- 800-7352900 domestic water can become "overheated". Overheated water can cause water heaters to explode or can allow scalding steam to be released from faucets upon personal use. This condition. is rare,, because the hot water heater thermostat and the T&P valve niust both malfunction simultaneo s However, nth the backflow prevention assembly in places the potential hazard exists. The City of Ashland shad notify customers installing backf .ow prevention assemblies of this potential hazard and, also recommends that the T&F valve be inspected pen"odically. A licensed plumber can inspect, or replace the T&p valve to ensure customer safety and assist with other methods of protection. such as thermal expansion. chambers and presslu{e Tellef toilet ball cock assemblies. The schematic on the left shows what can happen in the water heater if the excess pressure builds up. one solution to the problem is using an expansion tank as shorn in the second schematic. The Proludem l )angorc�us '�{ Expanded Water is lttte:rtat U P. able to Return to City Wale, SupplY L Pressure as City Water Supply r 7 BFP, Che4*, or PRV Uve t; y Caltapsad Flue or other oa;igetous Condition Could occur {r. yy7 r Mter and BTOS Lost From T&P Valve i Water Quaft Department Tel; 541 A88-5353 99 N. Mountain Avenue Fax: 541-552 2329 Ashland, OR 97520 TTY: 889-735-2990 The ���u�¢ora G _ TRISTINCT .All properties that require installation of a bacldlow assembly sham have said assembly tested annually by a State or Oregon certified tester. It is the responsibility of the property owner to contract with a State Ceilif ied tester and have the results submitted to the City of Ashland annually, Test results may be submitted either by the certified tester or by the customer. All RPBA., RPDA, DCVA., DCDA., PVBA., and SVB's assemblies are required to be tested as follows A) Immediately when installed B) Annually (based on the anniversary date of installation) C) when assembly is repaired D) when assembly is relocated Bacldlow assemblies may also be required to be tested more frequently than annually for approved backflow prevention assemblies that repeatedly fail, or are protecting health hazaYd cross connections, as determined by the water supplier. H ENFORCEMENT 4 1. The owner, manager, supervisor,or person in charge of any installation found not to be in compliance with the provisions of the water Regulation and Cross Connection Ordinance shall be notified in writing with regard to the corrective action(s) to be taken.. The time for compliance shall be in accordance with the "Degree of Hazard" 'Identified. 2. The owner, manager, supervisor, or person. in charge of any installation which remains in non --compliance after the time prescribed in the initial notification outlined in this Policy, shall be considered in violation of the Cross Connection ordinance. The City of Ashland may discontinue. water service to the said property. 3. If in the judgment of the City of Ashland, any owner, manager, supervisor, or person in charge of any installation found to be in non-compliance with the provisions of the Water Regulation and Cross Connection ordinance, neglects their responsibility to correct any violation., it may result in discontinuance of water service until compliance is achieved. 4. Failure of a certified backflow prevention assembly tester to submit any record required by the Water Regulation and Cross Connection ordinance or the submission of falsified reports and/or records may result i-P the City of Ashland taking the necessary actions to remove said tester h.-orn the City of Ashland's list of qualified testers for backflow prevention assemblies within the potable water system for a time period not to exceed one (1) year. If, after one (1) year, the testes wishes to be reinstated as a qualffled tester within. the City of Ashland, the tester shall submit in writing a request to do so. Water Qua* Depaftent Tel: 641•488-5353 90 N. Mountain Avenue Fax; 541-552 2329 Ashland, OR 97520 TM 890 735-2988 Customers who submit falsified reports shall be subject to discontinuance of their water service. S. Enforcement of this program shall be adma" stexed by the City of Asida.nd Public Works D ire ctor or his authorized representative. entative. 6. Requests for extension of time shall be made in writing to the Public Works Director or his authorized representative. 'fir In the event that the Public. Wori�,s Director or his authorized representative denies an extension for any reason, customer may appeal such denial to the City Administrator for review, Water Qualm bepadment Tel, 541-488-5353 00 N. Mountain Avenue Fax; 541-552-2320 Ashland, OR 97620 TTY; 800-735 2900 Appendix A Appen& B Partial Loust of Mustratlons Plumbing Hazards Backsiphonage Fixtures With Direct Sewer, sanitory The fnilowing i.flitstmtes typical :andersized ate► service line �nYl t411 Scwcr, storm plumbing inst-Mations where reduces the pressu a of the tivirnrning pool l acksiplaonage is pussthle, water closets to Wmospheric producing iA revcmt of rlae flow. DescirlptYon C. suggested Ca►rectiatt. 'Elie 13ackstphonage� water cunntcdon at the bedpalr Air conditiun:ng, iiix �y Iaat [x ! it'e5 with wash sink and tb sterilizer ilir condEttaning, drilled Atatrr Submerged Mills e I (i1ig. 44) should be provided with Ak conditioning, condenser !�, Cantact)?oint. A rubber properly !wolfed backfiow watcr loose is submerged in it bedpan hose pmevent�ts. ,t1.ir lixa.e Description sank. 1lspimtor, lab=t-ory B aptisma t fount Bnthrub B. Causes of It"Orsed F1aNv. (I) A stUd ixer rnrnnecred m tI10 13ac siphonage Aspimtur, mcdW tlspiantor, WcMidde a3tnd Bedpan Rasher, oushl'ng rim water supply 15 allowed tv c€01 Case 2 (Fig. 45) fi,mlizer Spin, yet Bidet without Opening the air vent As it cols, thepreswc �ithln A. Contact Point. A rubbcz (be seaIccl stenlixer 4rraps L-Ju v hose is submer ed in n Inborn - g Auxiliary system, indusrdrd Coaling rower attrrmosphedc producing a rorp sink. AiaLrity System, st lke grater Cusp Idvr vAcuum vtlucii dmivs the P. Cause of Reversed Flom . .�ii:Q?lnarS= system, irnnpptpvChd Dtlnkirig Cauntnitt polluted Watcr into the stetiliaet- cantuminating its coarews. (2) Two opposite ,multi -story buildings taro connected to die wel3 supply Floor draw, flushing rinr The ushiog of scvcraf flush fer shine water inain, i1�bid1 af€en Boiler stem sY C�bage con wash valve toilets on a lrnyer Boor (arks ndcquatc pyessure. The Clzcrtlrsal Feeder, Poi tYPA Ice maker "16(h are Connected to an building on the right has Chlorinator oboratory sink, serrated home instdcd u booster pump. Colfee tan 1.1mindry maa-h€nr: FIGURE 44, Cooling system Lavatory Spv4L���h�arra�v {Cttso t}. �t pT Dishwosher LA%'n sprinkler system cks ataa�a {Casa �j. Fire standpipe ors sprinkler P Photo hiburatory sink 5y5tert7 sm-er flashing manhole r� a - ' V=ntnira, ornamental Stop sltnk, flushing rim It 1 � ❑ ❑ kiydmtdir- equipment SIDI-) sink, thrc;idcd Nupply �_ Wit= _ ., l A Laboratory equipment Stearn; rfabfe - )Lubrtotion, pump bearings ilr.irnal, siphon jet Ialoivaur r �: Photostat ectuipment Megetuble 1weler : , ❑ ❑ ❑ ❑ Plumbees friend, pticunintic Water closet, Rush tank, � d ❑ ❑ Pump, ptieumntle ejector ball cad: _; � �µ � ��� ❑ Pum Cure line I p 1vat�r claret, Cash valve, , .:. ❑ ❑ ❑ ❑ Pump, water opeiarccl ejector 5tphdn cr 3 �,� 00 - s srxi=w z_3 Li ' ❑ [� C ROSS•Cf3NtIEU NV CONTROL 14ANUAL. Water Qualls Depaament Tel: 541-488-5353 90 N. Mountain Avenue Fax: 541-552 2329 Ashland, OR 97520 TY: 800=I35-2908 When tho pressure hinad-- Backsiphoriage Backsiphonage J3. Cause of Reversed Flow: equate hi 111v main, the build- ing boaster ptlMp stares .'i5t (Pig. �#7 Case 5 (f?ig. 45� Cunfuze May enter the distribution sy+steni by gravity pumping, producing n negAive A. Contact Paint; The water A, Coat -.Act Point: The gasoline or by sipllonige- in tfre event of pressure in the main and stipplyr to tilt dishwasher is not smrage tank is mintoined full a fruit or 6terlft in the water causing a reversal of now In the protected by a vacuum breaker. anti under prmsurc by sncam of main. oppWre Wilding, thee, the rlislrwmhur Inn ►t solid fit dittct connectia}r► to the city C. Suggested Correction. A C. Suggestcd Correction; Tile %vastc connection to the sewer. water distribution system. reduced pressure pthiciple 1vlaurattary sink Xvarer outlet B. Cause of Reveesed nlozv: backffoR' preventex should be should Ere provided Multi a The undersized main Seiving install"I in the line to the vacitl m breaker, `ile water the Intl ding is subject to FlaUA ± 4& gasolute stamge- rank ar a s11r8e service line ttr the boaster pump reduced ptessuxts, and thetefvre Baakslpharraga {CAse �. mnk and ,pump should 6� should fat equipped with a only Cite first two floors of the poovIded in that line. de►dce to cur off the pw-np building €ire supplied directly -k141cn pressure rlpptoaches a with city pressure. The tipper negative stead or vxctwm, floors are served from it booster - Raaksliphonage frump drawing suction dircaly Case 6 (PI& 4,9) from the viater service 11n1. Backsiphonage During Pella& of low city --t A. Colima POW: There is a case 3 (Pig. 46) pressurc, the boaster lrUrt11) submerged inlet: in the second Suction, crmtes llegalive h Boar Ln, thtuh. IL Contact Poitit; A cliemictll pre acres in tilt 1�. system, B. Caltse of Reversed Plotiv: tank Iras a submerged inlet. thereby revetsing rite flow, 1 An automob[le breats a nearby. 13, Cause ofRevcrsed Plnis: C. Suggested Gorcecttvn; The fire Nydrant causing a rush of Thu plant Jim pump draws dishwmbar trot and Gold water trta�n water €Ind A nrgative pre4sure in suction directly from tits city should be supplied thrmigh an the service line to the hnusc, water supply tine %vhfch is vir gal) and the waste Pram the sticking dirty water out of the insuificient to Serve normal chsl washer should discharge bathtub. plant requirements and a mplor through, tin Indirect wnste. Toe C. suggested Correcrion: The fire ter the same time. Dearing tt hnuster pomp sholrld be hot and cold tooter Wets to the rice emergency, reverses! Floe' equipped with n low-pressure �9, boilltub should br. ► Bove the may occur within the plant, Y �' cutoff device. fl cRalp Baokslpltaneoo (taefio Bj. rim of the tub. C. Suggested Correctiort: The . wotec service to the'dicialc'ol FIGURE 47 - =` tank should be ptovidcd HaAdphortage (case a). through an air grip, FIGUTIE 40, S Hovkslphurinne (Coca 3), f=ifii f D APPENDIX B • 09 Water Quality Department Tel; 541A88-5353 90 N. Mountain Avenue Fax: 541-552-2329 Ashland, OR 97520 TTY; 800 735-2900 Appendix C mustrat"lons C. Snggaswd Correction, lath pier• hater omict� shpuld proiect:ed ageinst Nwid low. be ` The mhlli NAtEf Service to tliC Backpressure -�� pier should tiiso 6e ptotei:tecl against backflnw lays an air gap TIIC folfaWul resents � ' RGURr:61. E7eaki[oly (Casa 2). l _- �_ �' or �tlrlced pressure ptitidple bmi:flow pseventcF, ilEustfations of typicid plutnbing , _ instdiaLions whets hacUow rirst.,Wny, f orn backpirmure is Backf low a Cmsc 4 (Fig. 53) it. Conn-ct Polut; A single-, ask �w valved connection cy:tsts C ass E aim. 50) between the public, poutblr t pint- A direct A, Contact . Baddlow \vntcrS Pl1` atld rite fire - s�7prmfcler sys[cnl of a rtii7l�l. connectioti from the city supply to the boller exists as a 49fet), Cole 2 (Fig. 51} J,, B. Ci use Of nevorsedJ bits measure and for rifling the & Culltact point; sc mge The aptitiklersptem is nor- systCnll. The bailer Water system sccplrig EMM " reaidrntial lnnlly SuppliCd front a tlearby Ls CllCftliCally ttrItted fOl SCStC cesspool polluxas Effie Plivare Backilow lake tbmvgll a high-pressilro reveadon find'mrnss'tou antral. ■tell wIddi is tmd for la%vn spdn ling, The dMeatIC AVOWCasI 3 �ltig• Uzi purnp. About the Jake nre latge nurnheis of over#lctwlag scpcic 13, Couse of Reversed'Flow" ` syswill, which is served from a city retain, is conartterl m die Ape Contact point; A ►calve connection exists iVWtCn the tab s.'LYthm dlu wave is left open, conklafllins(ed lake wamr TI1C %oiler-svator recirculation pump dust li C pressure dt well -supply by mans oft{ vrd% e, potable Arid the non potable can be- pumped to the public badcpresxum from the brit Tile purpose of tfre callt�Wicin . systems -aboard the Ship. supply- exceeds [tie c[ty water pressure and the chemically treated �Y � ro prtrne ttiC ivcli supply for emergency domestic B. Cause of reversed Flout; While the ship is Coanect:ed to C. Suggested Correctlatl; $11te potable water supply to the lire wetter is pumped into the use. the city water supply system system should be through an air domestic systern through tin B. Cease CrRevexsed Flow; (,Dr tilts purpose of taking an gap or tL reduced pressure open or Wky vatvc. During periods of low city water fur the potable sySrcm, pdrlcipic backflmv pmvcntec C 5uggcstcd Correction. As water pressure, possibly vOlun the valve betwcen the pntabIc should bu: wtd. minimum pzateMon two check laivil sprinkling is at its peak, find nonputablt systems is waves in series should be the LC&Purnp discharge ismmrc exceeds that ref the CitY ❑penLd, pormitting Commit- hated water to be putruped into FIGURE 53, E3rlv"OW (CO" 4)' provider! in the makeup %yaterUne to the boller syttern. plain and -%vell xYatcr u pElrllperl into talc city supply" through All the rntrnicipal stuppty. A10f E 81 ILS An our gap Separation or reclurerl pre3strtc principle Ora or leaky -vilve. F(GURE~ 62 eaeknow (case 3). _)�� L_ btiC�:�,ow preyeratcr it bracer �+ C �+ C. suggest d CiireCtttJCl� rtht' connmion bewten the Well f Sp�ittki�F FIGURE 60, water and city 1Yatcr shoold be ; i 5yston � I3at:k DY1 tCase t}, brol.cts 04 MAI inn ► cEzoss.c6NNF-cxroN COHl" OL MANUAL Water Qua* lmant TeI: #-488-5353 l 90 N. Mountain Avenue Fax: 541-55�-?_3�5 Ashland, OR 9752-0 TTY: 800 735-2900