Except where specifically designated herein, all words used in this document shall carry their customary meanings. Words used in the present tense include the future and plural words include the singular. The word "shall” is always mandatory, and the word "may" denotes the use of discretion in making a decision. Any definition not found in this section will take its meaning from the WAC (246-290), as amended, or in the most recent edition of the Manual of Cross Connection Control published by the Foundation for Cross Connection Control and Hydraulic Research, University of Southern California.
- "Agreement" shall mean all agreements for service installation, meters, and special service with any person, firm or corporation, or the authorized agents thereof.
- "Air gap" shall mean a physical separation between the free-flowing end of a potable water supply pipeline and the overflow rim of an open or non-pressure-receiving vessel. To be an "approved air gap," the separation must be at least twice the diameter of the inlet piping (supply pipe) measured vertically, and never be less than 1 inch.
- "Approved backflow prevention assembly" or "backflow assembly" or "assembly," shall mean an assembly to counteract backpressure or prevent back siphonage. This assembly must appear on the list of approved assemblies issued by the Washington State Department of Health. The assembly must be purchased and installed as a complete unit including two shut-off valves and test cocks.
- "Auxiliary supply" shall mean any water source or system other than the Public Utility District #1 of Clallam County's water. This will include but is not limited to, wells, streams, ponds, and irrigation ditches.
- "Backflow" shall mean the flow of water or other liquids, gases, or solids from any source back into the distribution system. The flow of water in the opposite direction of its intended flow.
- "Backflow Assembly Tester" shall mean a person holding a valid BAT certificate issued in accordance with the Washington Administrative Code 246- 290-490 and the RCW 18.106, 18.27, and 70.119.
- "Backpressure" shall mean backflow due to water pressure on the downstream side of the meter, which exceeds the operating pressure of the public potable water supply.
- "Backsiphonage" shall mean backflow due to a negative or reduced pressure within the public potable water supply.
- "Building Inspector" shall mean the Clallam County Building Inspector.
- "Closed system" shall mean any water system or portion of a water system in which water is closed to the atmosphere.
- "Connection” shall mean any physical connection to the District water system by any water service of any private water system or pipeline extension.
- "Contamination" shall mean the entry into or presence in a public water supply system of any substance, which may be harmful to the health and/or quality of the water.
- "County" shall mean Clallam County.
- "Cross connection" shall mean any physical arrangement where a public water system is connected, directly or indirectly (actual or potential), with any other non-drinkable water system or auxiliary system, wells, sewer, drain conduit, swimming pool, storage reservoir, plumbing fixture, swamp coolers, or any other device which contains, or may contain, contaminated or polluted water, sewage, used water, or other liquid of unknown or unsafe quality which may be capable of imparting contamination or pollution to the public water system as a result of backflow. Bypass arrangements, jumper connections, removable sections, swivel or changeover devices, or other temporary or permanent devices through which, or because of which, backflow may occur are considered to be cross-connections.
- "Cross Connection Specialist" or "CCS" shall mean a person holding a valid CCS certificate issued in accordance with the Washington Administrative Code who is employed by the District or under contract with the District.
- "Degree of hazard" shall mean the low or high hazard classification that shall be attached to all actual or potential cross-connections.
- "Distribution system" shall mean all piping components of the District's system that serve to convey water from transmission mains linked to source, storage, and treatment facilities to the consumer excluding individual services.
- "District" shall mean Public Utility District #1 of Clallam County.
- "DOH" shall mean Washington State Department of Health.
- "Double check valve backflow prevention assembly" "double check assembly" "double-check" "DCVA" or "DC" shall mean an assembly, that consists of two independently operating check valves, which are spring-loaded or weighted. The assembly comes complete with a shut-off valve on each side of the checks, as well as test cocks.