HomeMy WebLinkAboutO-0788 - Water supply cross-connections (14.10)\
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ORDINANCE NO.781
AN ORDINANCE OF THE CITY OF MARYSVILLE
PROHIBITING CROSS-CONNECTIONS AND PRO-
VIDING FOR BACK FLOW PREVENTION DEVICES
AND PROVIDING FOR DISCQNTlNUANCE OF
SERVICE FOR VIOLATIONS
t i i (Ii;[C t i f i
WHEREAS,the Department of Social and Health Servlces,
State of WashLngton,has enacted certaLn rules and regulat10ns
requLring munLcipalltLes to regulate and control cross-connectLons,
utLlLze back flow devLces and prevent possLble contamLnatlon of
the publlC water systems;and
WHEREAS,the purpose of thLs Ordlnance lS to protect
the health of water consmners by the control of actual andfor
potential cross~connect1ons through two bas~c programs.
A.Tnrough proper installatlon and survelll~nce of
back flow prevent~on dev~ces on service lLnes leadLng ~o premlses
where cross·connectLon eXlsts,or are llkely to occur,and
B.Through Lnspectlon and regulation of plurnblng wLthln
premises to m1n1m1ze the danger of contam1nat1on of water systems
on these prern1ses or the publ1C water supply itself and such lS In
the best interests of the C1ty of Marysv1lle,
NOW,THEREFORE,THE CITY COUNCIL OF THE CITY OF MARYSVILLE
DO ORDAIN as follows.
Section 1.Any customer,regardless whether res1dlng
w1thln or w~thout the Clty llmlts of the Clty o£Marysv1lle,wh~h
1S now rece1ving water from the Marysvllle Water System or who wlll
1n the future recelve water from the Clty of Marysv1lle,shall
comply wlth the rules and regulatlons contalned In thlS ordlnance.,
SectIon 2. For the purpose of thLs ordInance,"customer"
15 any person,£amlly,bU51ness,corporation,partner5~p or flrm
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connected to the Clty of Marysvllle Water Supply.
Sect~on 3.In additlon,any water d1str~ct,munlclpal
organ~zatlon or other organlzat~on wh~ch 1S connected to the
MarysV~lle Water Supplr for water and/or w~ch ~s £urn1shed to
people or members w~thin said d1~tr~ct or organ~zat1on,shall
cause all the people or members W1t~n sa~d d1str1ct or organlzatl0n
as well a~the dlstr~ct or organlzatlon 1tself to comply wlth the
rules and regulat~ons conta1ned 1n th15 ord~nance.
Sect10n 4.These regulat10ns are to be reasonably
~nterpreted.rt is the1r lntent to recognlze the varY1ng degrees
Qf hazard and to apply the prlnc1ple that the degree of protectlon
should be commensurate with the degree of hazard.
Section 5.As used in th~s ord1nance,unless the
context states otherw~se,the follow~ng de£1n~t~on shall apply,
(A)A1r gap separat10n means the unobstructed vert1cal
d~stance through the free atmosphere between the lowest open1ng from
any p1pe or faucet ~upplY1ng water to a tank,plumblng f1xture,
or other devlce and the flood level r1m of the receptacle,and
shall be at least double the d1ameter of the supply p1pe measured
vertically above the flood level r1m of the vessel.In no case shall
the gap be less than one ~nch.
(B)Aux11~ary supply means any water source or system,
other than the publ1c water supply,that may be aVa~lable 1n the
building or prem1ses.
(C) Back flow means the flow other than the 1ntended
d1rect1on of flow,of any forelgn 11QUlds,gases,or substances ~nto
the d~str1but1on system of a publlC water supply.
(1)Back pressure means back flow caused by a pump,
elevated tank,b01ler,or other means that could create pressure
w~thln the system greater than the supply pressure.
(2)Back 51phonage means a form of back flow due to a
negative or 5ubatmo5pher1c pressure w1th1n a water system.
(0)Back flow prevent10n devlce,means a dev1ce to coun~
teract back pressures or prevent back s1phonage.
(E)Cross~connection means any phys~cal arrangement
whereby a publ1c water supply 15 connected,d1rectly or lnd1rectly,
wlth any other water supply system,sewer,dra~n,condu~t,pool,
storage reservo1r,plumb~ng f1Xture,or other dev1ce w~ch conta1ns,
or may contain,contam1nated water,sewage,or other waste or llqU1d
of unkno~n or unsafe qual1ty wh1ch may be capable of lmpartlng
contam1nat~on to the publ1c water supply as a result of back flow.
Bypass arrangements,Jumper connect1ons,removable sectlon~,sW1ve1
or change-over dev~ce5,and other temporary or permanent dev1ces
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through whAch,or because of which,back flow could occur are
considered to be cross~connect~ons.
or)Double check valve assembly,means an assembly
composed of two single,independently acting check valves,~nclud~ng
tightly clos~ng shutoff valves located at each end of the assembly
and su~table connections ~or testing the watert~ghtness of each
check valve.
(G)Reduced pressure princ~ple back flow prevent~on de-
v~ce means a dev~ce ~ncorporat~ng two or more check valves and an
automat~cally operat~ng d~fferent~al rel~ef valve located between the
two checks,two shutoff valves,and equlpped w~th necessary appur-
tenances for testing The devlce shall operate to malntaln the
pres$ure in the zone between the two cheek valves,less than the pres-
sure on the publ~c water supply slde of the devlce.At cessatl0n of
normal flow,the pressure between the check valves shall be less
than tIle than the supply pressure.rn case of leakage of elther
check valve the dlfferent~al rellef valve shall operate to ma~ntaln
t~s reduced pressure py d~scharg~ng to the atmosphere.When the
~nlet pressure ~s two pounds per square ~nch or less the rellef
valve shall open to the atmosphere thereby prov~dlng an a~r~gap ln
the deV1ce.
Sectlon 6.CROSS-CONNECTIONS PROHIBITED
(A)Except as provlded ln Sect10n 7,all cross-connec-
tlons as above deflned,whether or not such crosS-connectlons are
controlled by automat~c deVlces,such as check valves or by hand-
operated mechan~sms such as a gate valve or stop cocks,are proh~b
1ted.
(B)~a1lure on the part of persons,£lrms,or corporat1ons
to d1scont~nue the use of any and all cross-connect1ons and to
phys1callr separate such cross-connectlons w1lI be ~u££lc1ent cause
for the dlscont~nuance of the public water serY1ce to the prem~ses
on wh~ch the cross-connectlon eX1sts.
(C) The purveyor shall,1n cooperat1on wlth the health
offlcer or the local plumb1ng lnspectlon authorlty,make perlodlc
lnspectlons of prem1ses served by the water supply to check for the
presence of cross-connectlons.Any cross-connect1ons found ~n such
inspection shall be ordered removed by the responslble agencr.If
an 1mmedlate hazard to health 1S caused by the cross-connect~on,
water serVlce to the premlses shall be dlscontlnued unt~l lt 15
yerlfled that the cr05s~connectlon has been removed.
Sect10n 7,
t i
USE OF BACKFLOW PREVENTION DEVrCES
(A)Backflow prevent10n devlces shall be lnstalled at the
serv~ce connect1on Qr wlth1n any prem~ses where ~n the Judgment of the
purveyor or the secretary the nature and extent of actlYltles on the
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of the
qUlred
dev1ce
unless
prem1ses,or the materlals used ln connectlon wlth the actlvltles,
or materlals stored on the premlses would present an Immedlate and
dangerous hazard to health should a cross-connectlon occur,even
though such cross-connectlon does not eXlst at the tlme the
backflow prevent10n dev1ce lS requlred to be lnstalled.ThlS shall
1nclude but not be llmlted to the followIng sltuatlons
(1)Premlses havlng an auxl11ary water supply,unless the
quallty of the auxlllary supply lS ln compllance wlth WAC 248-54-430
of the rules and regulatlons of the State Board of Health,three
coples of WhlCh are on f1le w1th the Clty Clerk.
(2)Premlses havlng lnternal cross-connectlons that are
not correct1ble,or 1ntr1cate plumb1ng arrangements Wh1Ch make 1t
1mpractlcable to ascertaln whether or not cross-connectlons eXlst.
(3)Premlses where entry lS restrlcted so that lnspectlons
for cross-connectlons cannot be made wlth sufflclent frequency or at
suff1clently short notlce to assure that cross-connectlons do not
eXlst.
(4)Premlses havlng a repeated hlstory of cross-connectlons
belng establlshed or re-establlshed.
(5)Premlses on whlch any substance lS handled under
pressure so as to perm1t entry 1nto the publlC water supply,or where
a cross-connect1on could reasonably be expected to occur.Th1S
shall lnclude the handl1ng of process waters and coollng waters.
(6)Premlses where mater1als of a tOX1C or hazardous nature
are handled such that 1f back slphonage should occur,a ser10US
health hazard may result.
(7)The followlng types of facllltles wlll fall lnto one
above categor1es where a backflow prevent10n dev1ce 1S re-
to protect the publ1C water supply.A backflow prevent10n
shall be lnstalled at these facllltles as set forth hereln
the CIty and the secretary determlnes no hazard eXlsts.
(a)Hospltals,mortuarles,clln~cs
(b)Laboratorles
(c)PIers and docks
(d)Sewage treatment plants
(e)Food or beverage processlng plants
(f)Chem1cal plants uS1ng a water process.
(g)Metal platlng lndustrles
(hl Petroleum proceSSIng or storage plants
(1)Rad10act1ve mater1al process1ng plants or nuclear
reactors
Others spec1f1ed by the secretary(J)
(B) The type of protectlve dev~ce reqUIred hereln shall
depend on the degree of hazard WhlCh eXlsts as follows
(1)An alr-gap separatlon or a reduced pressure prlnc1ple
backflow preventlon devlce shall be lnstalled where the water supply
may be contamlnated wlth sewage,lndustrlal waste of a tOX1C nature
or other contamlnant Wh1Ch would cause a health or system hazard.
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(2)In the case of a substance WhlCh may be ob]ectlonable
but not hazardous to healt~,a double check valve assembly,alt~gap
separat~on or a reduced pre~sure prlnclple back£low preventlon
devlce shall be lnstalled.
(C)Backflow preventlon deVlces requlred In thlS sectlon
shall be lnstalled at t~e meter,at the property llne of the premlses
when meters are not used,or at a locatlon deslgnated by t~e secre~
tary or~Clty.The devlce shall be located 50 as to be readl1y
accesslb1e for malntenance and testlng,and w~ere no part 9f the
devlce will be submerged.
CD)Back£low prevent~on dev~ces requ~red ~n th~s sectlon
shall be lnsta1led under the supervlslon of,and wlth the approval
of,the C1 t Y•
(E) Any protectlve deVlce requlred In thlS sectlon shall
be a model approved by the secretary.A double check valve assembly
or a reduced pressure prlnclple backflow preventlon devlce wlll be
approved ~f lt has successfully passed performance tests of the
Universlty of Southern Callfornla Englneerlng Center or other testlng
laboratorles satlsfactory to the secretary.
(F)Backflow preventlon devlces lnstalled under thlS
sectlon shall be lnspected and tested annually,or more often where
succeSSlve lnspectlons lndlcate repeated fallure.The deVlces
shall be repalred,overhauled,or replaced whenever they are found
to be de£ectlve.Inspectlons,tests and repalrs and records thereof
shall be done under the Clty'S supervlslon.
Sectlon 8.Fallure of any customer or any dlstr1ct or~
gan~zatlon to cooperate In the lnstallatlon,ma1ntenance,test1ng or
backflo~preventlon devlce or the requlrements of an alr-gap separa~
tlon shall be grounds for the term1natlon of the water serV1ces at
a po~nt where such £low,WhlCh lS to be termlnated by the Clt¥of
MarysV1lle,would best prevent poss1ble contamlnatl0n of the publlC
water supply.
Sect10n 9. Th1S Ord1nance shall take full force and
effect flve (51 days fol1owlng lts enactment and publ1catlon as
requlred by law.
PASSED by the Clty Counc11 of the Clty of MarysVllle t~s
'".<,t day of J.u~7J.A-V .'19.&...
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ATTEST,
CITY OF MARYSVILLE
APPROVED AS TO FORM
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