For the purpose of this subchapter, the following definitions shall apply unless the context clearly indicates or requires a different meaning. If a word or term used in this subchapter is not contained in the following list, its definition or other technical terms used shall have the meanings or definitions listed 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 (“USC”).
APPROVED AIR GAP (AG). A physical separation between the free-flowing discharge end of a potable water supply pipeline and the overflow rim of an open or non-pressurized receiving vessel. An APPROVED AIR GAP shall be at least twice the diameter of the supply pipe measured vertical above the overflow rim of the vessel and in no case less than one inch and in accord with State Plumbing Specialty Code.
APPROVED BACKFLOW PREVENTION ASSEMBLY, BACKFLOW ASSEMBLY or ASSEMBLY. An assembly to counteract backpressure and/or prevent back-siphonage, such as a reduced pressure principle backflow assembly (RPBA), reduced pressure principle detector backflow prevention assembly (RPDA), double check valve backflow prevention assembly (DCVA), double check detector backflow assembly (DCDA), pressure vacuum breaker backsiphonage prevention assembly (PVB) or spill-resistant pressure vacuum breaker backsiphonage prevention assembly (SVB) of a make, model, orientation and size approved by the State Department of Human Services.
ATMOSPHERIC VACUUM BREAKER (AVB). A device consisting of an air inlet valve or float check, a check seat and an air inlet port(s). This device allows air to enter the water line when the line pressure is reduced to a gauge pressure of zero or below. This device is designed to protect against a non-health or a health hazard under a backsiphonage condition only.
AUXILIARY WATER SUPPLY. Any water source or system other than the city’s water supply system that may actually or potentially become a cross-connection.
BACKFLOW. The flow in the direction opposite to the normal flow or the introduction of any foreign liquids, gases or substances into the water system. BACKFLOW occurs due to a differential pressure existing between two different points within a continuous fluid system and may occur due to either backsiphonage or backpressure.
BACKPRESSURE. An elevation of pressure downstream of the distribution system that would cause, or tend to cause, water to flow in the opposite direction.
BACKSIPHONAGE. A drop in distribution system pressure below atmospheric pressure (partial vacuum), that would cause, or tend to cause, water to flow in the opposite direction.
CERTIFIED BACKFLOW ASSEMBLY TESTER. A person who has successfully completed and maintains all requirements as established by the State Department of Human Services to be a tester in the state.
CERTIFIED BACKFLOW CONNECTION SPECIALIST or SPECIALIST. A person who has successfully completed and maintains all requirements as established the State Department of Human Services to be a specialist in the state.
CITY. The City of Cascade Locks.
CITY WATER SYSTEM. The City of Cascade Locks water system, which shall include its wells, pumping stations, reservoirs, supply trunk or feed lines, service lines, meters and all other appurtenances, device lines and things necessary to the operation of the system and to supply water service to individual property or premises and shall include the city’s potable water with which the system is supplied.
CONTAMINATION. The entry into or presence in a public water supply system of any substance which may be detrimental to health and/or quality of water.
CROSS-CONNECTION. Any physical arrangement where a potable water supply is connected, directly or indirectly, with any other non-potable or unapproved water supply system or auxiliary system, sewer, drain conduit, swimming pool, storage reservoir, plumbing fixture, swamp coolers or any other device which contains, or may contain, contaminated water, sewage, gases or other liquids of an unknown or unsafe quality which may be capable of imparting contamination 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 could occur, are considered to be CROSS-CONNECTIONS.
DEGREE OF HAZARD. Health (high risk) or non-health (low risk) hazard classification that shall be attached to all actual or potential cross-connections.
DHS. The Oregon Department of Human Services.
DIRECTOR. The Public Works Superintendent or his or her designee.
DOUBLE CHECK VALVE BACKFLOW PREVENTION ASSEMBLY (DCVA). An assembly of two independently acting approved check valves, including tightly closing resilient seated shutoff valves attached at each end of the assembly and fitted with properly located resilient seated test cocks. This assembly is designed to protect against a non-health hazard.
HEALTH HAZARD. An actual or potential threat of contamination of a physical, chemical or biological nature to the public potable water system or the consumer’s potable water system that would be a danger to health.
NON-HEALTH HAZARD (POLLUTION). An impairment of the quality the water to a degree that does not create a hazard to the public health, but does adversely affect the aesthetic qualities of such water for potable use.
O.A.R. The Oregon Administrative Rules.
POINT OF USE ISOLATION. The appropriate backflow prevention within the consumer’s water system at the point at which the actual or potential cross-connection exists.
POLLUTION HAZARD. An actual or potential threat to the physical properties of the water system or the potability of the public or the consumer’s potable water system, but which would not constitute a health or system hazard, as defined. The maximum intensity of pollution to which the potable water system could be degraded under this definition would cause a nuisance or be aesthetically objectionable or could cause minor damage to the system or its appurtenances.
POTABLE WATER SUPPLY. Any system of water supply intended or used for human consumption or other domestic use.
PREMISES. Any piece of property to which water is provided, including, but not limited to, all improvements, mobile structures and structures located on it.
PREMISES ISOLATION. The appropriate backflow prevention at the service connection between the public water system and the premises.
PRESSURE VACUUM BREAKER BACKSIPHONAGE PREVENTION ASSEMBLY (PVB). A device consisting of one or more spring loaded check valves and an independently operating air inlet valve installed as a unit between two tightly closing shut-off valves. The air inlet valve is internally loaded to the open position.
REDUCED PRESSURE PRINCIPLE BACKFLOW PREVENTION ASSEMBLY (RP). An assembly containing two independently acting approved check valves, together with a hydraulically operating mechanically independent pressure differential relief valve, located between the check valves and at the same time below the first check valve. The unit shall include properly located resilient seated test cocks and tightly closing resilient seated shutoff valves at each end of the assembly. This assembly is designed to protect against a non-health hazard or health hazard.
RESIDENT. A person or persons living within the territory served by the city.
RETROFITTING. To furnish a service connection with parts or equipment made available after the time of construction or assembly installation.
THERMAL EXPANSION. The pressure created by the expansion of heated water.
(Ord. 387, passed 6-12-2006)