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HomeMy WebLinkAbout5418 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, -1- .5419 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. -2- 5418 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 -3- 5418 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. -4- 5418 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. -5- 5418 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, -6- 5418 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. -]- 5418 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 -8- 5418 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. , -9- 5418 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. -10- 5418 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. -11- 5418 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. -12- 5418 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 -13- 5418 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 ." - - ~ " ~ ,. ,-......'- /, ~ .. -14- 5418 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 -15- 5418