CHAPTER 2
CROSS-CONNECTION CONTROL
CROSS-CONNECTION CONTROL
SECTION:
11-2-1: Purpose
11-2-2: Definitions
11-2-3: Cross-Connection Protection Requirements
11-2-4: Backflow Prevention Devices
11-2-5: User Supervisor
11-2-6: Administrative Procedures
11-2-7: Water Service Termination
11-2-8: Backflow Prevention Device Tester; Certification
A. Purpose: The purpose of this Chapter is:
1. To protect the public water supply against actual or potential cross-connection by isolating within the premises contamination that may occur because of some undiscovered or unauthorized cross-connection on the premises.
2. To eliminate existing connections between drinking water systems and other sources of water that are not approved as safe and potable for human consumption.
3. To eliminate cross-connections between drinking water systems and sources of contamination.
4. To prevent the making of cross-connections in the future. (Ord. 1110, 5-3-1988)
B. Prohibition: It is unlawful for any person at any time to make or maintain or cause to be made or maintained, temporarily or permanently, for any period of time whatsoever, any cross-connection between plumbing pipes or water fixtures being served with water by the City Public Works Department and any other source of water supply or to maintain any sanitary fixture or other appurtenances or fixtures which by reason of their construction may cause or allow backflow of water or other substances into the water supply system of the City and/or the service of water pipes or fixtures of any consumer of the City. (Ord. 1110, 5-3-1988; amd. 2000 Code)
AWWA STANDARD: An official standard developed and approved by the American Water Works Association (AWWA).
AIR-GAP SEPARATION: A physical break between a supply pipe and a receiving vessel. The air-gap shall be at least double the diameter of the supply pipe measured vertically above the top rim of the vessel, in no case less than one inch (1").
APPROVED BACKFLOW PREVENTION DEVICE: Devices which have passed laboratory and field evaluation tests performed by a recognized testing organization which has demonstrated its competency to perform such tests to the California Department of Health Services.
APPROVED WATER SUPPLY: Any water supply whose potability is regulated by a State or local health agency.
AUXILIARY SUPPLY: Any water supply on or available to the premises other than the approved water supply.
BACKFLOW: A flow condition, caused by a differential in pressure, that causes the flow of water or other liquids, gases, mixtures or substances into the distributing pipes of a potable supply of water from any source or sources other than an approved water supply source. Back siphonage is one cause of backflow. Back pressure is the other cause.
CONTAMINATION: A degradation of the quality of the potable water by any foreign substance which creates a hazard to the public health or which may impair the usefulness or quality of the water.
CROSS-CONNECTION: As the term is used in this Chapter, means any unprotected actual or potential connection between a potable water system used to supply water for drinking purposes and any source or system containing unapproved water or a substance that is not or cannot be approved as safe, wholesome, and potable. Bypass arrangements, jumper connections, removable sections, swivel or changeover devices, or other devices through which backflow could occur, shall be considered to be a cross-connection.
DOUBLE CHECK VALVE ASSEMBLY: An assembly of at least two (2) independently acting check valves including tightly closing shut-off valves on each side of the check valve assembly and test cocks available for testing the watertightness of each check valve and shall be purchased and installed as a unit.
DOUBLE CHECK, DETECTOR CHECK VALVE ASSEMBLY: A specially designed assembly composed of a line-size approved double check valve assembly with a specific bypass five-eighths inch (5/8"), five- eighths inch by three-fourths inch (5/8" x 3/4"), or three-fourths inch (3/4") water meter and a three-fourths inch (3/4") approved double check valve assembly. The meter shall register accurately for only very low flow and shall show a registration for all rates of flow. This assembly shall only be used to protect against a nonhealth hazard and shall be purchased and installed as a unit.
HEALTH AGENCY: The California Department of Health Services, or the local health agency with respect to a small water system.
LOCAL HEALTH AGENCY: The County or City health authority.
PERSON: An individual, corporation, company, association, partnership, municipality, public utility, or other public body or institution.
POTABLE WATER: Water that is approved for human consumption and meets the requirements of the health agency having jurisdiction.
PREMISES: Any and all areas on a water user's property which are served or have the potential to be served by the public water system.
PUBLIC WATER SYSTEM: A system for the provision of piped water to the public for human consumption which has five (5) or more service connections or regularly serves an average of twenty five (25) individuals daily at least sixty (60) days out of the year.
RECLAIMED WATER: Wastewater which, as a result of treatment, is suitable for uses other than potable use.
REDUCED PRESSURE PRINCIPLE BACKFLOW PREVENTION DEVICE: A device incorporating two (2) or more check valves and an automatically operating differential relief valve located between the two (2) + checks, a tightly closing shut-off valve on each side of the check valve assembly, and equipped with necessary test cocks for testing; and said device shall be purchased and installed as a unit.
SERVICE CONNECTION: Refers to the point of connection of a user's piping to the water supplier's facilities.
SHALL/MAY: "Shall" is mandatory. "May" is permissive.
WATER SUPPLIER: The person who owns or operates the approved water supply system.
WATER USER: Any person obtaining water from an approved water supply system. (Ord. 1110, 5-3-1988)
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