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RESOLUTION NO. 5418
A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF ARCADIA
ESTABLISHING A PROGRAM FOR CROSS-CONNECTION CONTROL
FOR WATER SYSTEMS
WHEREAS, a purpose of the City of Arcadia is to protect the public
potable water supply of the City of Arcadia from the possibility of
contamination or pollution by isolating within the customer's internal
distribution system(s) or the consumer's private water system(s) such
contaminants or pollutants which could backf10w into the public water systems;
and,
WHEREAS, the City of Arcadia proposes to promote the el imination or
control of existing cross-connection, actual or potential, between the
consumer's in-p 1ant potab 1e water system(s) and non-potab le water system( s),
plumbing fixtures and industrial piping systems; and,
WHEREAS, the ma intenance of a cont inu ing Program of Cross-Connect ion
Control will systematically and effectively prevent the contamination or
pollution of all potable water systems.
WHEREAS, the Water Manager shall be responsible for the protection of
the public potable water distribution/system from contamination or pollution
due to the backflow of contaminants or pollutants through the water service
connection. If, in the judgement of the Water Manager, an approved backflow
prevention assemb 1y is required at the customer I s water serv ice connect ion;
or, within the customer's private water system for the safety of the water
system, the Water Manager or his designated agent shall give notice in writing
to said customer to install such an approved backflow prevention assembly(s)
at specific location(s) on his premises. The consumer shall immediately
install such approved assembly(s) at the consumers own expense; and, failure,
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refusal or inability on the part of the customer to install, have tested and
maintain said assembly(s) shall constitute a ground for discontinuing water
service to the premises until such requirements have been satisfactorily met.
NOW, THEREFORE, THE CITY COUNCIL OF THE CITY OF ARCADIA, CALIFORNIA,
DOES HEREBY RESOLVE AS FOLLOWS:
SECTION 1. That the definitions used for implementation of the program
for cross-connection control shall be as follows:
A. Water Manager. The Water Manager in charge of the Water Division of
the City of Arcadia is invested with the authority and
respons ibil ity for the imp lementat ion of an effect ive cross-
connection control program and for the enforcement of the provisions
of this Resolution.
B. Approved. Accepted by the Water Manager as meeting an acceptable
specification stated or cited in this Resolution, or as suitable for
the proposed use.
C. Auxiliary Water Supply. Any water supply on or available to the
premises other than the purveyor's approved public water supply will
be considered as an auxiliary water supply. These auxiliary waters
may include water from another purveyor's public potable water
supply or any natural source(s) such as a well, spring, river,
stream, harbor, etc., or "used waters" or "industrial fluids".
These waters may be contaminated or polluted or they may be
objectionable and constitute an unacceptable water source over which
the water purveyor does not have sanitary control.
D. Backflow. The reversal of the normal flow of water caused by either
backpressure or backsiphonage.
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E. Backpressure. The flow of water or other I iquids, mixtures or
substances under pressure into the distribution pipes of a potable
water supply system from any source or sources other than the
.i ntended source.
F. Backs iphonage. The flow of water or other I iquids, mixtures or
substances into the distribution pipes of a potable water supply
from any source other than its intended source caused by the
reduction of pressure in the potable water supply system.
G. Backflow Preventer. An assembly or means designed to prevent
backflow.
1) Air-gap. The unobstructed vertical distance through the free
atmo:iphere between the lowest opening from any pipe or faucet
supplying water to a tank, plumbing, fixture, or other device
and the flood level rim of said vessel. An approved air-gap
shall be at least double the diameter of the supply pipe,
measured vertically, above the overflow rim of the vessel; and
in no case less than one inch.
2) Reduced Pressure Principle Assembly. An assembly of two
independently acting approved check valves together with a
hydraulically operating, mechanically independent differential
pressure relief valve located between the check valves and at
the same time below the first check valve. The unit shall
include properly located test cocks and tightly closing shut-off
valves at each end of the assembly. The entire assembly shall
meet the design and performance specifications as determined by
a laboratory and a field evaluation program resulting in an
approval by a recognized and City approved testing agency for
backflow prevention assemblies. The assembly shall operate to
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maintain the pressure in the zone between the two check valves
at an acceptable level less than the pressure on the public
water supp ly s ide of the assembly. At cessat ion of a norma 1
flow the pressure between the two check valves shall be less
than the pressure on the public water supply side of the device.
In case of leakage of either of the check valves the
differential relief valve shall operate to maintain the reduced
pressure in the zone between the check valves by discharging to
the atmosphere. When the inlet pressure is two pounds per
square inch or less, the relief valve shall open to the
atmosphere. To be approved these assembl ies must be readi 1y
accessible for in-line testing and maintenance and be installed
in location where no part of the assembly will be submerged.
3) Double Check Valve Assembly. An assembly of two independently
operat i ng approved check va 1 ves wi th tight ly c los ing shut-off
valves on each end of the check valves, plus properly located
test cocks for the testing of each check valve. The entire
assembly shall meet the design and performance specifications as
determined by a laboratory and field evaluation program
resulting in an approval by recognized and City approved testing
agency for backflow prevention assemblies. To be approved these
assemblies must be readily accessible for in-line testing and
maintenance.
H. Contaminat ion. Means an impa irment of the qua 1 ity of the potab le
water by sewage, industrial fluids or waste liquids, compounds or
other materials to a degree which creates an actual or potential
hazard to the public health through poisoning or through the spread
of disease.
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I. Cross-Connection. Any physical connection or arrangement of piping
or fixtures between two otherwise separate piping systems one of
wh ich contains po tab le water and the other non-potable water or
industrial fluids of questionable safety, through which or because
of which, backflow may occur into the potable water system. This
wou 1 d inc 1 ude any temporary connect ions, such as swi ng connect ions,
removab 1 e sect ions, four way plug va lves, spoo 1 s, dummy sect i on of
pipe, swivel or change-over devices or sliding multiport tube.
J. Cross-Connect ions - Contro lled. A connect ion between a potab 1 e
water system and a non-potable water system with an approved
backflow prevention assembly properly installed and maintained so
that it will continuously afford the protection commensurate with
the degree of hazard.
K. Cross-Connection Control by Containment. The installation of an
approved backf10w prevention assembly at the water service
connect ion to any customer I s premi ses where it is phys ica lly and
economically infeasible to find and permanently eliminate or control
all actual or potential cross-connections within the customer's
water system; or, it sha 11 mean the i nsta 11 at ion of an approved
backflow prevention assembly on the service line leading to and
supplying a portion of a customer's water system where there are
actual or potential cross-connections which cannot be effectively
eliminated or controlled at the point of the cross connection.
L. Hazard, Degree of. The term is derived from an eva luat ion of a
potential risk to public health and the adverse effect of the hazard
upon the potable water system.
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1) Hazard - Health. Any condition, device, or practice in the
water supply system and its operation which could create, or in
the judgement of the Water Manager, may create a danger to the
health and well-being of the water consumer.
2) Hazard - Plumbing. A plumbing type cross-connection in
consumer's potable water system that has not been properly
protected by an approved air-gap or approved back-flow
prevention assembly.
3) Hazard - Pol1utional. An actual or potential threat to the
physical properties of the water system or to the potability of
the public or the consumer's potable water system, but which
would constitute a nuisance or be aesthetically objectionable or
could cause damage to the system or its appurtenances, but would
not be dangerous to health.
M. Industrial Fluids System. Any system containing a fluid or solution
which may be chemically, biologically or otherwise contaminated or
polluted in a form or concentration such as would constitute a
health, system, pol1utional or plumbing hazard if introduced into an
approved water supply. This may include, but not be limited to:
po lluted or contaminated waters; a 11 types of process waters and
"used waters" originating from the public potable water system which
may have deteriorated in sanitary quality; chemicals in fluid form;
plating acids and a1kalines, circulating cooling waters connected to
an open cooling tower and/or cooling towers that are chemically or
biologically treated or stabilized with toxic substances;
contaminated natural waters such as from well, springs, streams,
rivers, bays, harbors, seas, irrigation canals or systms, etc; oils,
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gases, glycerine, paraffins, caustic and acid solutions and other
liquid and gaseous fluids used in industrial or other purposes or
for fire-fighting purposes.
N. "Pollution. The presence of any foreign substance (organic,
inorganic, or biological) in water which tends to degrade its
quality so as to constitute a hazard or impair the usefulness or
quality of the water to a degree which does not create an actual
hazard to the public health but which does adversely and
unreasonably affect such waters for domestic use.
O. Water Potable. Any water which, according to recognized
standards, is safe for human consumption.
P. Water - Nonpotab 1 e. Water wh ich is not safe for human consumpt i on
or which is of questionable potability.
Q. Water - Service Connection. The terminal end of a service
connection from the public potable water system; i.e., where the
Water Purveyor loses jurisdiction and sanitary control over the
water at its point of delivery to the customer's water system. If a
meter is installed at the end of the service connection, then the
serv i ce connect ion" sha 11 mean the downstream end of the meter.
There should be no unprotected takeoffs from the service line ahead
of any meter or any backflow prevent ion assembly located at the
point of delivery to the customer's water system. Service
connection shall also include water service connection from a fire
hydrant and all other temporary or emergency water service
connections from the public potable water system.
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R. Water - Used. Any water supplied by a Water Purveyor from a public
potable water system to a consumer's water system after it has
passed through the point of del ivery and is no longer under the
sanitary control of the Water Purveyor.
S. Water System. The water system shall be considered as made up of
two parts: the Utility System and the Customer System.
1) The ut il ity system sha 11 cons i st of the source facil it ies and
the distribution system; and shall include all those facilities
of the water system under the complete control of the utility,
up to the point where the customer's system begins.
2) The source shall include all components of the facilities
utilized in the production, treatment, storage, and delivery of
water to the distribution system.
3) The distribution system shall include the network of conduits
used for the delivery of water from the source to the customer's
system.
4) The customer's system sha 11 inc 1 ude those parts of the
facilities beyond the termination of the utility distribution
system which are uti 1 ized in conveying util ity-del ivered
domestic water to points of use.
SECTION 2. That the City of Arcadia's regulations for control of
backf10w and cross connections shall be as follows:
A. No water service connection to any premises shall be installed or
maintained by the Water Purveyor unless the water supply is
protected as required by State laws and regulations and this
Resolution. Service of water to any premises shall be discontinued
by the Water Purveyor if a backflow prevention assembly required by
this Resolution is'not installed, tested and maintained, or if it is
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found that a backflow prevention assembly has been removed. by-
passed, or if an unprotected cross~connection exists on the
premises. Service wi1l not be restored until such conditions or
.defects are corrected.
B. The customer's system should be open for inspection at all
reasonable times to authorized representatives of the City of
Arcadia Water Division to determine whether cross-connections or
other structural or sanitary hazards, including violations of these
regulations, exist. When such a condition becomes known, the Water
Manager shall deny or immediately discontinue service to the
premises by providing for a physical break in the service line until
the customer has corrected the condition(s) in conformance with the
State and City statutes relating to plumbing and water supplies and
the regulations adopted pursuant thereto.
C. An approved backflow prevention assembly shall also be installed on
each service 1 ine to a customer's water system at or near the
property line; but, in all cases, before the first branch line
leading off the service line wherever the following conditions
exist:
1) In the case of premises having an auxiliary water supply which
is not or may not be of safe bacteriological or chemical quality
and which is not acceptable as an additional source by the Water
Manager, the public water system shall be protected against
backflow from the premises by install ing an approved backflow
prevention assembly in the service line appropriate to the
degree of hazard.
,
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2) In the case of premises on which any industrial fluids or any
other objectionable substance is handled in such a fashion as to
create an actual or potential hazard to the public water system,
the public system shall be protected against backflow from the
premises by installing an approved backflow prevention assembly
in the service line appropriate to the degree of hazard. This
shall include the handling of process waters and waters
originating from the utility system which have been subject to
deterioration in quality.
3) In the case of premises having (ll internal cross-connection
that cannot be permanently corrected or controlled, or (2)
intricate plumbing and piping arrangements or where entry to all
portions of the premises is not readily accessible for
inspection purposes, making it impracticable or impossible to
ascertain whether or not dangerous cross-connections exist, the
public water system shall be protected against backflow from the
premises by installing an approved backflow prevention assembly
in the service line.
D. The type of protective assembly required under subsections 1, 2 and
3 shall depend upon the degree of hazard which exists as follows:
1) In the case of any premises where there is an auxi 1 iary water
supply as stated in subsection 1 of this section and it is not
subject to any of the following rules, the public water system
shall be protected by an approved air-gap separation. A reduced
pressure principle backflow prevention device may be provided in
1 ieu of an air gap separation device approved by the Water
Manager and the State Department of Health Services.
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2) In the case of any premises where there is water or substance
that wou 1 d be object ionab le but not hazardous to hea lth, if
introduced into the public water system, the public water system
shall be protected by an approved double check valve assembly.
3} In the case of any premises where there is any material
dangerous to health which is handled in such a fashion as to
create an actual or potential hazard to the public water system,
the public water system shall be protected by an approved air-
gap separation. A reduced pressure principle backflow
prevention device may be provided in lieu of an air gap
separation device approved by the Water Manager and the State
Department of Health Services. Examples of premises where these
condit ions will exi st inc 1 ude sewage treatment plants, sewage
pumping stations, chemical manufacturing plants, hospitals,
mortuaries and plating plants.
4) In the case of any premises where there are "uncontrolled"
cross-connections, either actual or potential, the public water
system shall be protected by an approved air-gap separation or
an approved reduced pressure principle backflow prevention
assembly at the service connection.
S} In the case of any premises where, because of security
requirements or other prohibitions or restrictions, it is
impossible or impractical to make a .complete in-plant cross
connection survey, the publiC water system shall be protected
against backflow from the premises by either an approved air-gap
separation or an approved reduced pressure principle backflow
prevention assembly on each service to the premises.
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E. Any backflow prevention assembly required herein shall be a model
and size approved by the Water Manager. The term "Approved Backflow
Prevention Assembly" shall mean an assembly that has been
.manufactured in full conformance with the standards established by
the American Water Works Asociation entitled:
AWWA C506-84 - Standards for Reduced Pressure Principle
and Double Check Valve Backflow Prevention Devices;
and, have met completely the laboratory and field performance
specifications of the Foundation for Cross-connection Control and
Hydraulic Research of the University of Southern California
established by
"Specifications of Backflow Prevention Assemblies
- Section 10" of the most current issue of the
MANUAL OF CROSS-CONNECTION CONTROL.
Said AWWA and FCCC&HR standards and specifications have been adopted
by the Water Manager. Fina 1 approval shall be evidenced by a
"Certificate of Approval" issued by an approved testing laboratory
certifying full compliance with the said AWWA standards and FCCC&HR
specifications.
The following testing laboratory has been qualified by the Water
Manager to test and certify backf10w preventers:
Foundation for Cross-Connection Control and
Hydraulic Research
University of Southern California
University Park
Los Angeles, California 90089-0231
Testing laboratories other than the laboratory listed above will be
added to an approved list as they are qualified by the Water
Manager.
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Backflow preventers which may be subjected to backpressure or
backsiphonage that have been fully tested and have been granted a
Certificate of Approval by said qualified laboratory and are listed
on the laboratory's current list of "Approved Backflow Prevention
Assemblies" may be used without further test or qualification.
F. It shall be the duty of the customer-user at any premises where
backflow prevention assemblies are installed to have certified
inspections and operational tests made at least once per year. In
those instances where the Water Manager deems the hazard to be great
enough he may require certified inspections at more frequent
intervals. These inspections and tests shall be at the expense of
the water user and shall be performed by the assembly manufacturer's
representative or by a certified tester approved by the Water
Manager. It shall be the duty of the Water Manager to see that
these tests are made in a time ly manner. The customer-user sha 11
notify the Water Manager in advance when the tests are to be
undertaken so that an official representative may witness the tests
if so desired. These assemblies shall be repaired, overhauled or
replaced at the expense of the customer-user whenever said
assemblies are found to be defective. Records of such tests,
repairs and overhaul shall be kept and sent to the Water Manager.
G. All presently installed backflow prevention assemblies which do not
meet the requirements of this section but were approved devices for
the purposes described herein at the time of installation and which
have been properly maintained, shall, except for the inspection and
maintenance requirements under subsection F, be excluded from the
requirements of these rules so long as the Water Manager is assured
that they will satisfactorily protect the utility system. Whenever
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the existing device is moved from the present location or requires
more than minimum maintenance or when the Water Manager finds that
the ma i ntenance const itutes a hazard to hea lth, the unit sha 11 be
"replaced by an approved backflow prevention assembly meeting the
requirements of this section.
SECTION 3. That the City Clerk shall certify to the adoption of this
Resolution.
Passed, approved and adopted this 21st day of June
, 1988.
//~~
Mayor of the Clty of Arcadla
ATTEST:
C~f~e ~~~la
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STATE OF CALIFORNIA )
COUNTY OF LOS ANGELES)
CITY OF ARCADIA )
I, JUNE D. ALFORD, City Clerk of the City of Arcadia, hereby certify that the
foregoing Resolution No. 5418 was passed and adopted by the City Council of
the City of Arcadia, signed by the Mayor and attested to by the City Clerk at
a regular meeting of said Council held on the 21stdayof June
1988, and that said Resolution was adopted by the following vote, to wit:
AYES: Counci lmember Chandler, Lojeski, Young and Harbicht
NOES: None
ABSENT: Counci lmember Gi lb
J
C
y of Arcadia
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