“APPROVED BACKFLOW PREVENTION ASSEMBLY” or “BACKFLOW ASSEMBLY” or “ASSEMBLY” means an assembly to counteract backpressure and/or prevent back-siphonage. This assembly must appear on the list of approved assemblies issued by the Oregon State Health Division.

“AUXILIARY SUPPLY” means any water source or system other than the City’s water.

“BACKFLOW” means the flow in the direction opposite to the normal flow or the introduction of any foreign liquids, gases, or substances into the water system of the City of Hood River.

“CERTIFIED CROSS CONNECTION SPECIALIST” or “SPECIALIST” means a person who has successfully completed and maintains all requirements as established by the DHS to be a Specialist in the state of Oregon.

“CERTIFIED BACKFLOW ASSEMBLY TESTER” means a person who has successfully completed and maintains all requirements as established by the DHS to be a tester in the state of Oregon.

“CITY” means the City of Hood River.

“CITY WATER SYSTEM” shall refer to and mean the City of Hood River’s Water System, which shall include, it’s wells, pumping stations, reservoirs, supply, trunk or feeder 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 premise and shall include the City’s potable water with which the system is supplied.

“CONTAMINATION” means the entry into or presence in a public water supply system of any substance which may be deleterious to health and/or quality of the water.

“CROSS CONNECTION” means any physical arrangement where a potable water supply is connected, directly or indirectly, with any other non-drinkable water 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, or other liquid of 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 may occur, are considered to be cross connections.

“DEGREE OF HAZARD” means the LOW or HIGH HAZARD classification that shall be attached to all actual or potential cross connections.

“DHS” means the State of Oregon Department of Human Services.

”DIRECTOR” means the Public Works Director or his/her designee.

“DOUBLE CHECK VALVE BACKFLOW PREVENTION ASSEMBLY” or “DOUBLE CHECK ASSEMBLY” or “DOUBLE CHECK” means an assembly which consists of two (2) 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 to test the checks for tightness.

“HEALTH HAZARD” means 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)” means an impairment of the quality of 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.

“OAR” means Oregon Administrative Rules.

“POINT OF USE ISOLATION” means the appropriate backflow prevention within the consumer’s water system at the point at which the actual or potential cross connection exists.

“POLLUTION HAZARD” means 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” means any system of water supply intended or used for human consumption or other domestic use.

“PREMISES” or “PREMISE” means any piece of property to which water is provided, including, but not limited to, all improvements, mobile structures and structures located on it.

“PREMISE ISOLATION” means the appropriate backflow prevention at the service connection between the public water system and the premises.

“REDUCED PRESSURE PRINCIPLE BACKFLOW PREVENTION ASSEMBLY” or “REDUCED PRESSURE PRINCIPLE ASSEMBLY” or “RP ASSEMBLY” means an assembly containing two independently-acting approved check valves together with a hydraulically-operated, mechanically-independent pressure differential relief valve located between the check valves, and at the same time, below the first check valve. The assembly shall include properly located test cocks and two tightly closing shut-off valves.

“RESIDENT” means a person or persons living within the territory served by the City of Hood River.

“RETROFITTING” means to furnish a service connection with parts or equipment made available after the time of construction or assembly installation.

“THERMAL EXPANSION” means the pressure created by the expansion of heated water.