HomeMy WebLinkAbout2018.02.27 AWAC Agenda ASHLAND WATER ADVISORY COMMITTEE
February 27,2018
AGENDA
Im CALL TO ORDER: 4:00 PM, SiskiJ ou Room, 51 Winburn Way Ashland, OR
IIo ANNOUNCEMENTS
IIIe 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. ADJOURNMENT: 6:00 PM
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CITY OF
ASH LAN
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ASHLAND water Advisory Committee
MINUTES
October 24 2017
77771
�esrvrirts �:: pprr - ..fin.
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
J Water Efficiency Program review. See attached presentation.
Brown asked for the reasoning behind sun setting the lawn replacement program. Smitherman explained that the
communityis being saturated and anyone interested in this program will have participated by 2020.The lawn
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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
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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
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of water going into Bear Creek. Smitherman said we need to make sure we don't have any unintended
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Ashland Water Advisory Ad-Hoc Committee(AWAC)
October 24, 2017
Page I of 3
ASHLAND water Advisory Committee
MINUTES
October 24 2017
Tl s� ni t s. ►d April .t is.0
..........
conseque
nces 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.
Williamsasked if the projected water demand scenarios included any growth projected for the City. Smitherman
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explained that there was .50 percent per year of growth calculated and based on a Demographer report from
Jackson County.
Graf questio
ned 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
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costs for 2015-2016 lawn replacements and Smitherman said she does have those numbers,
Brown asked if there was an measure that we didn't select on that list that Maddaus would have recommended.
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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 It
recommended. Brown mentioned that if anyone on the committee wants more information on any of the measures
and that Smitherman could provide the information.
programs
Williams asked which affect summer usage the most and mentioned the rain catchment program.
programs 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 re ardin the projected water demand scenarios and questioned the overall savings
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ions and Plan B may not be sufficient.Graf said if we assume due to climate we are going to see significantly
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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
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infrastructure planning and we will also have a drought plan that will be on top of this,
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Bro1i'■ifrn mentioned that we had a drought and recession hitting at the same time and that our community responded
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really well and reduced water usage significantly to meet our goals. Brown believes the demand scenarios model s
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.
r felt it is a good case that is well thought out and adjustable and that our community is different and responds
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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,
he thinks the numbers are good for demand in this plan and said he is prepared that we may have to go to
Graf said
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
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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
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Ashland Water Advisory Ad-Hoc Committee(AWAC)
October 24, 2017
Page 2 of 3
ASHLAND water Advisory Committee
MINUTES
October 24 2017
1 rrnes, endn + ��ttee"
give really
ive away. This is a reap 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
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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
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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 that the Committee meet again in January.All agreed.
proposed
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
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CITY 0F
ASI-ly LAA` r
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
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requirements are net as identified in the City of Ashland's Municipal Code Chapter
P.
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.
B. POLICY
City of Ashland Municipal Code Chapter 14.05-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 Adrninistrative Rules relative to cross
connections. All revisions to the City's Cross Connection Control Frog-ram 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 M' igation such as private wells, streams,and
Talent hligation(TID)services within the City Iin u'ts. 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 managerslowners.
City of Ashland Cross Connection Specialists will.conduct inspections for cross
connection.compliance.
The City of Ashland water Department shall maimain all records of inspections for cross
connection program compliance. 'Fbe City of Ashland water Department shall establish
and inaintain inforniation desclibing assemblies and procedures suitable for eliminating
potential cross connections to the City of.Ash.land"s water supply system. Depending on
the"Degree of Hazard",any property Bo-tumd to be M' violation of the c=ent-requirements
of the City of Ashland Municipal Code for cross connections shall be given.an
Water Quality department Tel: 541A88-5353
94 N,Mountain Avenue Fax.541-552-2329
Ashland,OR 97520 TTY; 800 735-2998
R
appropriate arnowit of time to correct the violation. Enforcement of tine Cross
Connection Control Program shall be under the authority of the City of.Ashland Public
Works Director,or his designee.
All new residentia.l,commercial and industrial constxruction 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 overwhehned 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.
Infolmation shall be kept in our files,located at 90 North Mountain,Avenue,Ashland,
Oregon, we will record all information gathered from the returned.sw-veys and prioritize
each property based on"Degree of Hazard"according to Section D of this document,
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 RAZARD AND APPROVED ASSEMBLIES
Degree of Hazard and Approved Assemblies
The City of Ashland recognizes that varying degrees of hazard are caused by different cross-
connections. The co.ndition.s 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: 541A88-5353
90 N.Mount-n Averme Fax.541 552 2329
Ashlandf OR 97520 TTY:800 735-2900
k
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 assernblies
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 consumed 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 disconnected 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"fioza.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 Hazards'.
Water Quality Deparlm'ent Tel:5414 M353
90 N.Mountain Avenue Fax:544-552 2329
Ashland,OR 97520 TTY:800 735 29D9
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TA-BLE 48
PREMISES REQUHUNG ISOLATION BY AN APPROVE,D AIIR GAP
O.
REDUCED PRESS ME PRINCIPLE TYPE OF ASSEMBLY
M H Z RD
1. Agricultural (e.g. farms, dairies) .
2.Beverage bottl ing pl ants"
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. Prem'ises 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 p ip g under in d pressure for conveying liquids other than
otable water and.the piping is installed in proximity to potable water
p pp g
piping
20. Premises with an auxiliary grater supply that is connected to a potable
water supply
21. PrerY ses where the water sip tier is denied access or restricted access
p
for survey
22. Premises where the water is being treated by the addition of chemical or
other additives
Refer to OAR 333w061-0070 8 remise Isolation Requirements.� �p
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 wattling plant.
: 'FABLE 49
Backflow Prevention Methods Used Foi•Premise Isolation
Degree of Identified Hazard
Non-Health Hazard (Pollutant) Health Hazard onta inant)
BACKS11PHONAGE OR BACKSIPHONAGE OR
13AC PRESSURE BAC PRESSURE
Air Ga (AG).. Air Gaplka)
Reduced Pressure principle Reduced Pressure principle
Baekflow Prevention Assembly Backflow-Prevention Assembly (RP)
-Reduced pressure Principle- Reduced Pressure Principle-Detector
B aekflow Prevention Assembly B ackflow Prevention Assembly
(RPPA) (RPDA A
Double Check valve B ackfl ow
Prevention Assembly(D�)
Water Quality Department TO 541-488-5353
90 N,Moue VinAvenue Fax:541-552-2329
Ashland,OR 97520 TTY:809 735 2909
E. ELIN41NATION 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 compliance willbe based upon the`{Degree of Hazard"to the public
water supply systei-n. (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 bacl�flow 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 a11ow a complete evaluation of
the"Degree of Hazard"associated with such auxiliary water systems,an approved
reduced pressure prinoiple assembly or approved air gap shall be required as a mirlirnurn
of protection.
d.No person shall fill special use tanks or tankers containing pesticides,fertilizers,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 . TBERMAL EXPANSION NOTIFICATION
Installation of bacldlow assemblies is required to eliminate potential cross connections
due to possible pollution or contamination problems. Installation of these bacldlow
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 La control of
excessive heat and pressure is a condition known as"thermal expansion". Tbemal
expansion allows extremely hot water to bacIdlow into water main 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 tho 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 Qtiallt 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 3 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 backfl.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 pressure
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 The ton
Dangerous Expanded Water is
Internal Unable to Return to City Water SuPPIy Internal Pressure
. � flomins at e
Pressure Sate Level
� City water Supply
»7��t�I1':'�r�W-.�[-`,�i tcriSy`r^i•'�� ...r=�r�i�'tii-lrSr'_.':S�'_'?i;?y7r r.�r'.•
` or PRV Uve
ez BFP, h�Gk, '`•, •_ Expansion
t• y' ,. '' Tank
�sxr��Yz Air
F -g •! �`� Callapsad Flue or �:r�..,-t.- Cesh,an
attar oangetous Condition
Could occur
Excess Pressure
i5 Controlled by
Expansion Tank
r
{ry
}L
yy7
r
�S
Mter and Ms
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
. TE TING
All pyoperties that require installation of a bacI low 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 Cell-fxed tester and have the results submitted to
the it o f Ashland and annu ally,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 baclf.ow revention assemblies that repeatedly fail,or are protecting health
pp p
hazard cross connections, as deternu*ned by the water supplier.
H ENFORCEMENT
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 Con ecti.on
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 `I3egree 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 aff outlined in this
Policy,shall be considered in violation of flie Cross Connection Ordinance, The City of
Ashland may discontinue.water service to the said propeityk
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 ser'vi ce until compliance is
achieved}
3
4.Failure of a certified backflow prevention assembly tester to submit any record
3
required by the Water Regulation and Cross Connection Ordinance or the submission of
falsified reports and/or xecords may result i-P the City of Ashland taking the necessary
actions to remove said tester fi-orn the City of Ashland's list of qualified testers for A
bacldlow 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.
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Water Quallf Depaftent Tel:641•488-5353
90 N.Mountain Avenue Fax;541-552-2329
Ashland,OR 97520 TM 800 735-2988
Customers who submit falsified reports shall be subject to discontinuance of their water
r
service.
S. Enforcement of this shall.be adma" stexed by the City of Asida.nd Public
program
Works D ite 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.
7, In the event that the Public.Wor%s DirectoJ7 or his authorized representative denies an
extension for any reason, customer may appeal such denial to the City Administrator for
review,
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Water Qualm bepadment Tel: 541-488-5353 k
00 N.Mountain Avenue Fax;541-552-2320
Ashland,OR 97520 TTY; 800-735 2900
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Appendix A Appen&B
Pa
n Gal LUSHX of
Plumbing Hazards Backsiphonage
Fixtures With Direct Sewer,sanitary The fnilowing aIlttstmtes typical ttndersizcd ate►service lime
Ui'1Yl t�3n Sewer,storm plumbing insr;tllations where reduces the pressure of the
' backsiplaonage is iwssthle, water dosets to Wmosphertc
swirnining pool
producing it revcmt of rlte fluty
Desc�rlprivn C.suggested Ca►rectia[I.Tlie
13aGks1 h�nag� water cunnmvon or the bedpan
Air condidurk ng,uk�washet Fixt ryes with trash time rind tb sterilizer
JYir conditioning,daillyd Neater L#]iT}t"'i'G 'd li� C c I(i�ig,Qw#} shaulcl be.provided Yvitit
Ak condiiionirig,'Condenser j�.Contact Point.A rubber properly installed backfiow
water hose is submerged in it bedpan pruventm,
,a1.ir lixa.e
Description wask sank.
Aspirmor,htbnratory B aptismat fount B.Causes of It"Orsed Flow.
Aspimtur,medic Bnthrub (1)A sturilizer rnranecterl m tlrc 13aGksiphor7age
rls�lintor,vrcediddc arm Bedpan Rasher,fitisliing rim hater supply Is allowed to crwl Case 2(Fig.45)
fi,mlizer Spin,yet Bidet without opening the air vent: A.Contact Point.A rubber
As it cools,€hepteswo within
Autoclave and sterilizer Brine tank- the sealed stedlixer 4rraps L-Ju v hm is submerged in n Inborn-
Auxiliary system,industri€d Coaling tower atmospheric producing a. Corp sink.
alai Laity 3ysteno,stulke water Cusp Idvr vAcuurn which dmivs the P.Cause of Reversed Flow,
Polluted Watcr into the steriliaec Two opposite,muld-story
AAwx!Bary�system,unapptoved Drinking Cauntaut ,
wcl3 supply Floor drafn,flushing tiny cantuminat-ing its coarews.(2) buildings Cart±connected to die
Boger system The flushiog ofxcvcral flush seine water main,wbid1 When
$y Crarbabe con washer valve toilets on a Irnyer#Ivor larks ndcq€ratc pyessure.The
cherallad feeder,Poi rypa Ice maker wliizh are Connected to art building on the right has
Chlorinator Laboratory sink,serrated rim0c iraded u booster hump.
Co[icc uta Imindry maihint: FI UIJE 44,
UPOMphonage
Cooling system Lavtatorry t cks pT aiie�o{Casa�j.
Dislrwnsiier Lawn sprinkler system
Fire standpipe ors sprinkler
P Photo hiburatory sink
system sm-er flashing manhole V r -
s
Vtruntniu,urnamenwl A
Stop sitak,flushing Cirri 1 AM
_ ❑ ❑
kiyc mtdii-equipment SIoI.)Sink,thrtadcd ttupply
Tboratary equipment .{= ` f _ •�
v;-V7St n rfsfe . ❑❑
a ❑ ❑
Lubrrcrition,pump bearings
litioal,siphon jet 61oivour
Photostat equipment Z ❑ ❑ ❑ ❑
getubic lseeler _ -•�u
Plumbees friend,pticumotic ==ram
Water closet,Rush tank,
Pump,prteumtitle ejector ball earl: _�;RR- � 1—= 1 ❑❑ ❑ ❑
Pum , Ci ne line
l p 1vat�r claret,€trash valve, ;Y
Pump,water op arrcl ejector si brio'cr -�� ❑ ❑ ❑ [I
r ' -ice ❑❑ ❑ ❑
��•-.vim: -11 �f 1•=1.�. G7
• [i 5
[t C;F�QS •Cf3t�tfFGTt[]N CONTROL 14ANUAL.
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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 Backsip)✓onage Backalphonage A,Cassia of Reversed l<inw:
equate hi tltr rerun,the build- Cunf_ise may enter the
ing boaster pttttip stares C'�se (Pig.�#7 Case 5(dig.48) distribution sy+steni by gravity
pumping,producing n negAive A.Contact Paint:The water A,Coat-.Act Point.,The gasoline or by sipltonrtge-in the event of
pressure in the plain end stiipplyr to tltt dishwasher is not smrage tank is mintoined full a lrnit or 6tertk in the water
causing a reversal of now In the protected by a vacoun1 breaker. and under pressure by mean of main,
oppWre Wilding, Also,the cHiwmhur Inn a solid a clittct conricction.to the city C.Suggested Correction.A
C.Suggestcd Correction;Tile %Vmtc COeiUCC don to the sewer. water distribution system. reduced ptessute pthiciple
lvlaurtttoly sink water outlet B.Cause ofReveesed Now.- bacic#Fo,�%,preventex should be
should be provided w1di a The undersized main serving instullccl in the line to the
ractturrt brenlcer,`lle writer the building is subject to FlaUAE 4& gasolifie stamge-rank ar a s11r8e
service line vo the boaster pump reduced pressuxts,and thetcfvre Baakslphartaga(t,'A9Q . mnk and pump should 6�
should bt egeippcd with u only the first two floors of(lie Irravf&I in that line.
desdce to cur off the pump building€ire supplied directly
-ktirlten pressure rspptoaches a with city pressure.The tipper
negative head or vxctwm, floors aro served from it booster - f3aCksliph.Dnage
PUMP drawing 3tiction direaly Case 6 Pi&49)
from the viater service Hoc.
Backsiphanage During peria&of low city --t A.colttact•POW:There is u
case 3{Pi<�lG} pressure,the booster PUJI11) ; submerged inlet:in tlta second
g suction crmtes ltegalive Agar hathtuh.
IL Contact Poitit;A chemical pre acres in till lam,system, �- l3.Ca1�t:of Reversed PloNw.
tank Nas a submerged inlet. thereby tevetslng die flow, w An automobile breats a nearby
13,Cause oF'PcYcrsed Plots: C.Suggested Corcertion;The fire hydrant causing a rush of
Thu plant Jim pump draws dishwmbcr hot and Gold water Main water acid a nrgative pre4sure in
suction directly from tits city should be supplied thrmigh an the service line to the hnusc,
Water supply line%vhfch is vir gap and the waste Pram the sticking dirty water out of the
insuiriclent to serve normal cPsl washer should discharge bralitub.
plant requirements and a mplcrr through tin Indirect wnste.The C.Suggested Correcrion:The
fire ttr the same time.During a hnuster pomp should be hot and cold tooter Wets to the
rice emergency,reverses!Floe' equipped with n low-pressure bollttub should br.above the
MIRYoccur within the lint, cutoff device. �gl#FiE 9,
P Baokalptianec�o(taefio Bj. titu of the tub.
C.Suggested Cvrrectiow The '
water service to the chefuiCA FIGURE 47
tank should be ptovidcd Batakdphortiage(case a).
through h an air grip,
A
Hovkslphurinne(Cosa 3), S
DO
CHEMICALS IItC. - �. o
F1S AlS�itY�S6 r
r
Semi
t
St€Ytee i
Low sWca .
M3111
1-4, p°
APPENDIX B 09
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Water Quality Department Tel;541A88-5353
90 N.Mountain Avenue Fax:541-552-2329
Ashland,OR 97520 TTY; 800 735-2900
3
3
Appendix C
C.Snggaswd Correction,
ffl
1♦
u u Ml rtcb pies lvaccr s}vc#ct sltcul
be protected ageinst f�widlowL
u `
The maim water service to the
- •, pit:t:should olso 6e ptotettecl
_- against backflnw by an ftir gap
Tltc foliawzngpresetzts or rcrlr CM pre.-Aare ptindple
tlEustratrons of typtc;il pltirnbisr €ieakito1Y(Casa 2). } _ bmitflow pseventer,
instdiadons whotu baclCliow
resri}zing f orn backpirssure is
Backf low
Cmsc 4(rig,53)
$aC;kilo11LI' A.. � it.CaY3tact Point;A single-.
valved connection cxists
C asc E aim.Sel between the public,potitblr
- � � e l
A.Contact
Hint:Adirect Baddlow � � Witt rsupp y slid the ftrc-
conrrertiotr from the city supple Craze 2(Fig.51) J,, sprinkler systcrtl of a mill.
to thebofler exists as a s9fet}� B.Cause of Ste+�crscdlrloty:
measure anrd for rang the &cmiltact Point;5t=mge The sptinHersptem is nor-
: sy�tCrtl,71te 6D&I NRt1Cr system seeping EMM 1 residrntid molly supplied front a nearby
Ls chemically trrItted for stxr[u cesspool palluxcs the pritrare Backilow lake through a higli-presswc
rcventfou find euurn lion ■tell wlridi is tmd for lawn pump.About the Jake nre large
antral. spunlcling,xhu(10DIeStIC AVOW Case 3(Fig.5} truinbcrs of overff awing scPdc
13,Couse of Reversed'Flow"` syswill'which is served from a Ape Contact point;A Wive tab s.'X[hm dluvilve is left
Tltc boiler 3vator recirculationcity main,is conawdr!ro the connection exists between the open,contaminated lake vows
pump discharge pressure dt u'e Supply by mans oft{-Yrdve. potable nad the non potable can ba pumped to the public
backpressum from the brat
Tlrc purpose of tfte cvnncctr systems-aboard the slap.
supp y
may 6e ro prarne rile w&
exceeds the dty water prcasma B.Carrie of Re-versed FlOw; C.Suggested Cortectlatl;The
and the Chemically treated supply for emergency domestic White the ship is coanect:ed to powb1c water supply to the ore
whiter is pumped into the mac' the city water supply system system should be tlrrnligh an air
darrresricsy�stcm through an B-C-ause of�tevexsed Flow; (,Dr tile purpose aE'taking an gap or�reclitced pressure
open or leaky valve. During periods F tlaw city arm far the potable sysncm, principle backflmv pmvcnter
G 5uggcstrd Correction:As Neater pressure,possibly01un the valve between the potable should bt:ustd.
latvrl sprinkling is at its pwk, artd n n ❑talilt Systems is
minimum pzateMon two check the�reli rim list ha c l'
valves in series should be P P rg trpened,lrermittiny,contanit. FIGURE 53
prf}Yi�ler!in the maicetrp [3f�mrc caceeds that Of the Cfty hated water to be pumped into sag"aw{Casty q}.
evatt rlirfe to the boiler system. main and-well xYatcr u puro>cA the municipal supply.
_ n c gap�eparrttion or into the city supply through nil A10%81 ILS
reclurecl lrr stri c prislriple open a l�ky ti+1lre. F(GURE 62
eaeknow(Gass 3).
bntkaw prevent"it better. C.Suggested Garrecdow The
conrrtetion betwween the Well f
Starter and city 1Yatcr should be ; Seri ki�F
FIGURE 60, i syston �
I3at:k[tosrr{Cese rt}, brokca
mA ? `
-�-Pump
_ � ft .1�•f =�.
Tu potable
iA Ij
i - ;system
ti-r.���„�-•, mot- _•'�UI1����31�`�d�� '"� _ .
itn ► cpog,8-CON NFICxloN CownbL MANUAL
Water Quality Depariment Tel:541-488-5353
i
90 N.Mountain Avenue Fax:541-552-2329 i
Ashland,OR 9752-0 TTY: 800 735-2900
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