1994-02 Regulations Governing Cross Connections
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ORDINANCE NO. 94-02
AN ORDINANCE OF THE BOARD OF DIRECTORS OF THE
SAN DIEGUITO WATER DISTRICT ESTABLISHING RULES
AND REGULATIONS GOVERNING CROSS CONNECTIONS
AND ADOPTING THE PROVISIONS OF THE CALIFORNIA
ADMINISTRATIVE CODE, TITLE 17, SECTIONS 7583
ET SEQ., PERTAINING TO CROSS CONNECTIONS BY
REFERENCE AND AMENDING CERTAIN PROVISIONS OF
THE ADMINISTRATIVE CODE AND INCORPORATING
CERTAIN NEW PROVISIONS INTO THE ADMINISTRATIVE
CODE OF THE DISTRICT
BE IT ORDAINED by the Board of Directors of the San Dieguito Water District
as follows:
SECTION 1: The provisions of the California Administrative Code, Title
17, Public Health, Sections 7583, et seq., as amended from time to time, are
hereby adopted by reference as the Rules and Regulations of the San Dieguito
Water District governing cross connections.
SECTION 2:
Rules and Requlations Governinq Cross Connections.
A.
.
B.
C.
The rules and regulations governing cross connections are set forth in
District Ordinance No. 94- and in the Manual of Cross Connection
Control published by the Foundation for Cross Connection Control &
Hydraulic Research, University of Southern California.
Installation and Maintenance of Backflow Preventers. The District shall
determine whether a backflow prevention assembly shall be installed and
maintained by the customer. (See Administrative Code Section 9. 2C.)
The customer shall bear all costs of the installation and maintenance.
All backflow prevention assemblies must be approved by the District and
by the university of Southern California, School of Engineering,
Foundation for Cross Connection and Hydraulic Research. All new
installations and replacements shall be reduced pressure principle
assemblies.
Monitorinq Backflow Prevention Assemblies. District personnel shall
inspect and conduct tests as needed to determine the effectiveness of
backflowassemblies. Additional tests shall be conducted as frequently
as necessary to insure the effectiveness of the backflow assemblies and
in any event not less frequently than once a year. In the event a
backflow assembly is found to be unsatisfactory, the District Manager
shall take immediate steps to insure that corrective measures are
accomplished and/or service terminated.
SECTION 3: Article 9, section 9.10 (D, E and F)
Administrative Code are hereby amended as follows:
of the California
D.
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Annual Testinq by Customer. The customer will own the backflow assembly
and will have the full responsibility for annual testing (or more often
if required by the District) for maintenance, repair and retesting, and
for providing the District with proper records and test data.
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The District will generate notices for approximately one fourth (1/4th)
of the District's backflow assembly each calendar quarter. Notices will
be mailed to the District's customers giving them sixty (60) days to
test, and repair if necessary, their assembly and furnish the test and
repair data to the District. A list of certified testers and repair
companies will be provided simultaneously with the notices. If no test
data is furnished to the District within the sixty (60) day period, the
District will send a second notice advising the customer that failure to
supply test and repair data where repair is necessary to the District
within thirty (30) days from the mailing date of the second notice will
result in commencement of proceedings to terminate water service. If
the District does not receive test and repair data where repair is
necessary within thirty (30) days of the date the second notice was
mailed, the District will post in a conspicuous location on the property
(hang on resident's door and/or attach to backflow device) a notice
that the customer's service is scheduled for discontinuance within
fifteen (15) days. The notice from discontinuance shall read as
follows:
SAN DIEGUITO WATER DISTRICT
505 So. Vulcan Avenue
Encinitas, CA 92024
(619) 633-2658
"TERMINATION NOTICE FOR NON-COMPLIANCE WITH CROSS CONNECTION RULES
AND REGULATIONS
DATE:
WATER SERVICE ADDRESS:
THE WATER SERVICE SYSTEM FOR THE ABOVE SERVICE ADDRESS IS NOT IN
COMPLIANCE WITH THE DISTRICT'S RULES AND REGULATIONS GOVERNING
CROSS CONNECTIONS AND BACKFLOW PREVENTION. INSTALLATION, TEST,
AND/OR REPAIR DATA MUST BE PROVIDED TO THE DISTRICT NO LATER THAN
TO AVOID SERVICE TERMINATION. IF YOU HAVE ANY DISPUTE OR COMPLAINT
REGARDING THE DISTRICT'S REQUIREMENT, YOU MUST CONTACT THE DISTRICT
WITHIN FIVE (5) DAYS OF RECEIPT OF THIS NOTICE. IF YOU OR ANYONE
AT THE ADDRESS BEING TERMINATED HAS A MEDICAL CONDITION WHICH
REQUIRES CONTINUATION OF WATER SERVICE, A LETTER FROM A PHYSICIAN
LICENSED IN THE STATE OF CALIFORNIA MUST BE PRESENTED TO THE
DISTRICT'S CROSS CONNECTION REPRESENTATIVE WITHIN FIVE (5) DAYS OF
RECEIPT OF THIS NOTICE. PROMPT ATTENTION TO THIS LETTER IS
REQUIRED TO AVOID TERMINATION OF SERVICE AND A TURN-ON FEE TO RE-
ESTABLISH SERVICE. FOR FURTHER INFORMATION, TELEPHONE (619) 633-
2658 AND ASK FOR THE DISTRICT'S CROSS CONNECTION AND BACKFLOW
REPRESENTATIVE."
A final forty-eight (48) hour termination notice will be prepared and
attempts will be made to contact the customer forty-eight (48) hours
prior to actual termination of service. The forty-eight (48)
termination service notices will read as follows:
SAN DIEGUITO WATER DISTRICT
505 So. Vulcan Avenue
Encinitas, CA 92024
OPEN IMMEDIATELY
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E.
F.
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(619) 633-2658
"48-HOUR TERMINATION NOTICE
DATE: TIME:
YOU ARE HEREBY NOTIFIED THAT THE SERVICE AT (ADDRESS) WILL BE
TERMINATED WITHIN FORTY-EIGHT (48) HOURS OF THIS NOTICE UNLESS THE
SERVICE IS BROUGHT INTO COMPLIANCE WITH THE DISTRICT'S RULES AND
REGULATIONS GOVERNING CROSS CONNECTION AND BACKFLOW PREVENTION
DEVICES. IF YOU HAVE ANY QUESTIONS CONCERNING THIS TERMINATION
NOTICE, PLEASE CONTACT THE DISTRICT'S BACKFLOW PREVENTION CROSS
CONNECTION REPRESENTATIVE AT .(619) 633-2658.
YOUR PROMPT ATTENTION TO THIS NOTICE IS REQUIRED TO AVOID SERVICE
TERMINATION."
Where the District determines that a condition exists which creates an
immediate health risk to the public water system, the District shall be
entitled to terminate service without notice until the public health
impact is corrected.
Responsibility of Costs. All costs for installation, test and repair
are borne by the customer. Inspection will be the responsibility of the
District.
Annual Test Charqe. A test charge shall be billed to the customer for
the annual testing of backflow prevention devices as provided under Sec.
8.6.
SECTION 4: Pursuant to and in Compliance with the California
Administrative Code Title 17, generally accepted engineering practice,
recognized health standards and American Water Works Association
recommendations, the San Dieguito Water District has established cross
connection rules and regulations.
A.
SECTION 5:
The purposes of Cross Connection rules and regulations are:
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B.
To protect the District system from the possibility of contamination or
pollution, by isolating within customer systems such contaminants or
pollutants which could backflow or back-siphon into the District' s
system; and
B.
To provide for the maintenance of a continuing program of cross
connection control which will systematically and effectively prevent the
contamination or pollution of the District system.
SECTION 6: Definition of Terms. Whenever in this Ordinance, or in any
document where they govern, the following terms are used, they shall be
defined as follows:
A.
Approved. Accepted by the Board as meeting a applicable specification
stated or cited in this Ordinance, or as suitable for the proposed use.
Auxiliary Water Supply.
Any water supply, other than the District
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c.
D.
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system, on or available to a customer system. These auxiliary waters
may include water from another purveyor's public potable water supply or
any natural source(s) such as well, spring, river, stream, lagoon,
estuary, etc., or "used waters" or "industrial fluids". These waters
may be polluted or contaminated, or they may be objectionable, and
constitute an unacceptable water source over which the District does not
have control.
Backflow: The flow of water (or other liquids, mixtures or substances)
under pressure into the District system from any source or sources other
than its intended source.
back-siphonaqe. The flow of water or other liquids, mixtures or
substances) into the District system from any source other than its
intended source, caused by the sudden reduction of pressure in the
District system.
E.
Backflow Preventer.
or back-siphonage.
An assembly or means designed to prevent backflow
1)
Air-Gap. A means of backflow prevention utilizing the unobstructed
vertical distance through the free atmosphere between the lowest
opening from any pipe or faucet supplying water to a tank, plumbing
fixture, or other assembly 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 top of the rim of the
vessel; provided, however, that in no case shall air-gap be less
than one inch. When an air-gap is used at the service connection
to prevent the contamination or pollution of the District system,
an emergency by-pass shall be installed around the air-gap system
and an approved reduced pressure principle assembly shall be
installed in the by-pass system.
2)
Reduced Pressure Principle Assembly> A backflow prevention
assembly consisting of an assembly of two independently operating
approved check valves with an automatically operating differential
relief valve between the two check valves, tightly closing shut-off
valves on either side of the check valves, plus properly located
test cocks for the testing of the check and relief valves. The
entire assembly shall meet the design and performance
specifications and approval of a recognized and approved testing
agency for backflow prevention assemblies. The assembly shall
operate to maintain the pressure in the zone between the two check
val ves at a level less than the pressure of the inlet of the
assembly. At cessation of normal flow the pressure between the two
check valves shall be less than the pressure at the inlet of the
assembly. 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 assemblies must be readily accessible for in-line
maintenance and testing and be installed in a location where no
part of the assembly will be submerged.
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F.
G.
H.
1.
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K.
L.
M.
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3)
Double Check Valve AssemblY. A backflow prevention assembly
consisting of an assembly of two independently operating approved
check valves with tightly closing shut-off valves on each side 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 and approval of a recognized and
approved testing agency for backflow prevention assemblies. To be
approved, these assemblies must be readily accessible for in-line
maintenance and testing.
Board.
The Board of Directors of the District.
contamination. The impairment of the quality of the potable water by
sewage, industrial fluids or waste liquids, compounds or other materials
to a degree which creates an actual hazard to the public health through
poisoning or through the spread of disease.
Control.
The right and power over the sanitary quality of water.
Cross-Connection. Any physical connection, or arrangement of piping or
fixtures, between two otherwise separate piping systems, one of which
contains potable water and the other of which contains no-potable water
or industrial fluids or questionable safety, through which, or because
of which, backflow or back-siphonage may occur into the District system.
A metered water service connection between the District system and a
customer system which is cross-connected to a contaminated fixture,
industrial fluid system or with a potentially contaminated supply or
auxiliary water system, constitutes one type of cross connection. other
types of cross-connections include connectors such as swing connections,
removable sections, four-way plug valves, spools, dummy sections of
pipe, swivel or changeover assemblies, sliding multiport tube, solid
connections, etc.
Cross-Connection Control by Containment. The installation of an
approved backflow prevention assembly in any customer system at the
metered water service connection.
Desiqnate. An employee of the District designated by the General
Manager to enforce the provisions of this Ordinance.
District.
The San Dieguito Water District.
Hazard. Deqree of. The term is derived from an evaluation of the
potential risk to the public health and the adverse effect of the hazard
upon the District system.
1)
Hazard - Health. Any condition, assembly, or practice in the
District system, or its operation, which could create, or in the
judgement of the General Manager may create, a danger to the health
and well-being of any water customer.
a)
Hazard - Plumbing. A plumbing type cross-connection in a
customer system that has not been properly protected by an
air-gap separation or backflow prevention assembly is a health
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N.
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T.
hazard.
2)
Hazard - Pollutional. An actual or potential threat to the
physical properties, or to the potability, of the District system,
which would constitute a nuisance or be aesthetically objectionable
or could cause damage to the District system, but would not be
dangerous to health.
Hazard - System. An actual or potential threat of severe damage to
the physical properties of the water system, or of a pollution or
contamination which would have a protracted effect on the quality
of the potable water in the District system.
3)
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, pollutional or plumbing hazard if introduced into the District
system. "Industrial fluids systems" include, but are not limited to:
polluted or contaminated waters; all types of process waters and "used
waters" originating from the District system which may have deteriorated
in sanitary quality; chemicals in fluid form; plating acids and
alkalies; circulated 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 wells, springs, streams, rivers, bays, harbors, seas, irrigation
.canals or systems, etc.; oils, gases, glycerine, paraffins, caustic and
acid solutions and other liquid and gaseous fluids used for industrial
or other purposes or for fire-fighting purposes.
o.
Manaqer.
The General Manager of the District.
P.
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.
Q.
Water - Metered Water Service Connection. The terminal end of a service
connection from the District system (that is, where the District loses
control over the water at its point of delivery to the customer system),
being the downstream end of the meter. There should be no unprotected
takeoffs from the service line ahead of any backflow prevention
assembly. Service connections shall also include metered water service
connections from a fire hydrant and all other temporary or emergency
water service connections from the District system.
R.
Water - Nonpotable. Water which is not safe for human consumption or
which is of questionable potability.
s.
Water - Potable. Any water which, according to recognized standards, is
safe for human consumption.
Water Systems.
The water system made up of two parts; namely, the
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u.
District system and the customer systems.
1)
The District System consists of the source and the distribution
system under the complete control of the District, up to the point
where the customer systems begin.
a)
The source shall include all components of the facilities
utilized in the production, treatment, storage, and delivery
of water to the distribution system.
b)
The distribution system shall include the network of conduits
used for the delivery of water from the source to the customer
systems.
2)
The customer systems consist of all'water components beyond the
metered water service connections.
Water - Used. Any water supplied by the District from the District
system to a customer system after it has passed through the metered
water service connection and is no longer under the control of the
District.
SECTION 7:
Responsibility.
.
a.
A.
The Board shall be responsible for the protection of the District system
from contamination or pollution due to the backflow or back-siphonage of
contaminants or pollutants through the metered water service
connections.
B.
If, in the judgement of the Manager or designate, an approved backflow
prevention assembly is required at any metered water service connection
for the safety of the District system, the Manager or designate shall
give notice in writing to the affected customer to install an approved
backflow prevention assembly at each of such customer's metered water
service connections. wi thin the time prescribed by the Manager or
designate, the customer shall install such approved assembly or
assemblies at the customer's own expense; and failure, refusal or
inabili ty on the part of the customer to install said assembly or
assemblies shall immediately constitute a ground for discontinuing water
service to such metered water service connections until such assembly or
assemblies have been properly installed.
C.
If the customer files with the District a written protest of the degree
of hazard involved and the commensurate degree of protection required to
be providèd, the matter shall be referred by the District to the
appropriate health agency. If the protest involves a new meter
installation, the District shall not commence water service until after
the health agency has delivered its written decision to the District.
The written decision of the health agency shall be final.
SECTION 8:
Implementation.
No metered water service connection to any premises shall be placed in
service by the District unless the District system is protected as
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B.
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required by state laws and regulations and by this Ordinance. Service
of water to any premises shall be immediately discontinued by the
District if a backflow prevention assembly required by this Ordinance is
not installed, tested and maintained, or if it is found that a backflow
prevention assembly has been removed, by-passed, or if an unprotected
cross- connection exists on the premises. Service will not be restored
until such conditions or defects are corrected.
All customer systems shall be open for inspection at all reasonable
times to authorized representatives of the District to enable the
District to ascertain the existence of cross-connections or other
structural or sanitary hazards, including violations of this Ordinance.
When such a condition becomes known, the 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 state laws and District ordinances
relating to plumbing and water supplies, and with regulations adopted
pursuant thereto.
c.
An approved backflow prevention assembly shall be installed on each
metered water service connection to a customer system at or near the
property line or immediately inside the building being served; but, in
all cases, such assembly shall be installed before the first branch line
leading of the service 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 Manager, the
District system shall be protected against backflow from the
premises by the installation of a backflow prevention assembly in
the customer system appropriate to the degree of hazard.
2)
Whenever backflow protection has been found necessary on a customer
system, then all metered water service connections shall be
protected by an approved backflow assembly regardless of whether
any are not being used.
3)
In the case of premises on which any industrial fluid, or any other
objectionable substance, is handled in such a fashion as to create
an actual or potential hazard to the District system, including the
handling of process waters and waters originating from the District
system which have been subject to deterioration in quality, the
District system shall be protected against backflow by the
installation of a backflow prevention assembly appropriate to the
degree of hazard.
4)
Whenever the following conditions exist on any premises,
District system shall be protected against backflow by
installation of a backflow prevention assembly:
the
the
a)
Internal cross-connections
corrected or controlled; or
cannot
be
permanently
that
b)
Intricate plumbing and piping arrangements; or
.
c)
.
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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.
d)
The type of protective assembly required under the foregoing
section C shall depend upon the degree of hazard which exists
as follows:
( 1)
(2)
(3)
In the case of any premises where there is an auxiliary
water supply as stated in Subsection C. 1), and such
supply is not subject to any of the following rules, the
District system shall be protected by an approved air-gap
separation or an approved reduced pressure principle
backflow prevention assembly.
In the case of any premises where there is water or
substance that would be objectionable, but not hazardous
to health, if introduced into the District system, the
District system shall be protected by an approved reduced
pressure principle assembly.
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 District
system, the District system shall be protected by an
approved air-gap separation or an approved reduced
pressure principle backflow prevention assembly.
Examples of premises where these conditions will exist
include 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 District system shall be protected by an
approved air-gap water separation or an approved reduced
pressure principle backflow prevention assembly.
(5)
In the case of any premises where, because of security
requirements or other prohibitions or restrictions or
size of the premises, it is impossible or impractical to
make a complete in-plant cross-connections survey, the
District system shall be protected against backflow or
back-siphonage from the premises by the installation of
a backflow prevention assembly. In this case, maximum
protection will be required; that is, an approved air-gap
separation or an approved reduced pressure principle
backf1ow prevention assembly shall be installed in each
metered water service connection to the premises.
(6)
A reduced pressure backflow preventer, as near to the
metered water service connection as possible, will be
required on all premises where sewage, toxic wastes, or
metered water service connection as possible, will be
required on all premises where sewage, toxic wastes, or
other injurious materials are pumped, processed or
treated. Any premises where because of the size or
impracticality of conduction complete in-plant
inspections, reduced pressure principle backflow
assemblies will be required. In general, a reduced
pressure backflow preventer will be required when anyone
of the following conditions exist:
.
(a)
(b)
(c)
(d)
(e)
(f)
(g)
(h)
( i)
.
(j)
(k)
(I)
(m)
(n)
(0)
(p)
(q)
(r)
(s)
(t)
(u)
(v)
(w)
(x)
(y)
(z)
Sewage treatment plant or pump station.
Auxiliary water system (interconnected); certain
solar systems.
Multiple story buildings and large master metered
complexes; shopping centers.
Building with sewage ejectors.
Cannery, packing house or reduction plant.
Car wash with water reclamation system.
Centralized heating and air conditioning plant,
including "tri-systems".
Chemical Plant.
civil works (facilities not subject to the city of
Encinitas plumbing codes or inspection).
Dye works.
Film processing or other laboratory.
Fire system with auxiliary supply.
Hospital, or mortuary.
Schools.
Food processing plant.
Restaurant.
Rendering plant.
Veterinarian or pet hospital.
steam boiler.
Plating facility or metal finisher.
Non single family residential Irrigation systems or
residential irrigation systems that are not in
compliance with any section\regulation required by
this Ordinance.
Manufacturing, processing or other fabricating
plant using toxic materials.
Paper production plant.
Restricted, classified or other closed facility.
Sand and gravel plant.
Where a cross-connection is maintained.
Any backflow prevention assembly required by this Ordinance shall be of
a model and size approved by the District. The term "Approved Backf1ow
Prevention Assembly" shall mean an assembly that has been manufactured
in full conformance with the standards established by the American Water
Works Association, as set forth in its publication entitled:
E.
.
"AWWA C506-69
and that has met
standards for Reduced Pressure Principle"
completely the
laboratory
and
field performance
.
specifications of ~e F~ooation for cross-conne~ion Co~rol aoo
HydrauHc Research of the university of southern california. Said
pwlications, inclOOi~ a~ ~n~nts or r~isions ~ereto. are h~~
adopted =d incorporated in ~is ordinance as fully as if s~ ~ at
length herein.
Final approval shall be evidenced by a "certificate of APproval" issued
~ an ~proved testing l~oratory, c~tifyi~ full c~1iance wi~ said
AWWA standards and SCCC&HR specifications.
F.
~e foll~i~ testi~ labor~o~ is her~ ~proved W ilie Board to test
and certifY backflow preventers:
F=nd~ion for cross-connection co~rol aM ~dr~1ic Rese~ch
university of southern california
University park
Los Angeles, california 90007
G.
Testi~ ~aboratories oilier ilian ilie ~aborato~ listed ~~e may be added
to the approved list.
It ~all be ~e ~q of ~e ~st=er/user at a~ pr~ises were ba~f1~
pr~e~ion ass~lies are installed to h~e certified inspections aoo
~erational tests made at least =ce per year. In ~ose instances were
the District deems the hazard to be great enough, it may require
certified inspections at more frequent intervals. These inspections and
tests shall be at the expense of the customer ¡user, and shall be
performed by a qualified manufacturer's representative, by District
personnel, or ~ an appr~ed c~tifi~ tester. It shall be ~e ~~ of
~e Discrict to see ~at ~ese timely tests are made. ~ese asse~lies
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 made
available to the District.
.
SECTIOO 9. Section 18.6 of the San Die~ito Water District Mministrat~e
Co~, adopted W Resol~ion No. R81-20, Mgust 24, 1981, is hereby r~ealed.
PASSED, ~OPTW ~D ~p~ED W ilie Board of Directors of ilie San Dieguito
Water District at a regular meeting held on the 19thday of october
1994, ~ ilie foll~ing v~e: --
AYES:
NOES:
ABSTAIN:
ABSENT:
Directors Wiegand. Bond. Hano. D~ivier & D~is
None
None
None
~l!.~.
Board of Directors
1
.~ " /Jï1. < ,b~,-~^>.--
'vV'- /1/ [L
. wasserman, Secretary
--