The definitions set forth in this subsection apply throughout this chapter.

(1) "Backflow" means the flow, other than the intended direction of flow, of any foreign liquids, gases, or substances into the distribution system of a public water supply.

(2) "Backflow prevention device" means a device to counteract back pressure or prevent back siphonage.

(3) "Contamination" means the entry into or presence in a public water supply of any substance which may be deleterious to health and/or quality of the water.

(4) "Cross-connection" means any physical arrangement whereby a public water supply is connected, directly or indirectly, with any other water supply system, sewer, drain, conduit, pool, storage reservoir, plumbing fixture, or other device which contains or may contain contaminated water, sewage, or other waste or liquids of unknown or unsafe quality which may be capable of imparting contamination to the public water supply as a result of backflow.

(5) "Manager" means the manager of the water/irrigation division of the city of Yakima, or his authorized agent.

(6) "Health officer" means the Yakima County district health officer, or his authorized agent.

(7) "Public water supply" means any system or water supply intended or used for human consumption or other domestic uses, including source, treatment storage, transmission and distribution facilities, where water is furnished to any collection or number of individuals, or is made available to the public for human consumption or domestic use.

(8) "Purveyor" means the city of Yakima or its authorized agent.

(9) "Secretary" means the secretary of the department of social and health services, or his/her authorized agent.

(10) "Unit of consumption, (UOC)" means the basic unit of measure for water consumed, and shall contain one hundred cubic feet per unit. (Ord. 97-16 § 1, 1997).