An approved backflow prevention assembly shall be installed on each service line to a customer’s premises at or near the property line or immediately inside the building being served, but in all cases, before the first branch line leading off the service line, if it is impractical to provide effective air-gap separation, when any of the following conditions exist:
(A) Premises where industrial fluids or any other non-potable substances are handled in such a manner as to create actual or potential hazard to the public water system;
(B) Premises having internal cross-connections that cannot be permanently corrected and controlled, intricate plumbing and piping arrangements, or where entry to all portions of the premises is not readily accessible for inspection purposes making it impracticable or impossible to ascertain whether or not cross-connections exist;
(C) Premises having an auxiliary water supply, including, but not limited to, a well, cistern, spring or pond, rivers or creeks that is not, or may not be, of safe bacteriological or chemical quality and that is not acceptable as an additional source by the general manager or his or her designated representative;
(D) The plumbing from a private well or other water supply enters the building served by the public water supply, or is connected, directly or indirectly, to the public water supply;
(E) The owner of occupant of the premises cannot, or is not willing, to demonstrate that the water use and protective features of the plumbing are such as to pose no threat to the safety or portability of the water;
(F) The nature and mode of operation within the premises is such that frequent alterations are made to the plumbing;
(G) The nature of the premises is such that the use of the structure may change to a use wherein backflow prevention is required;
(H) There is a likelihood that protective measures may be subverted, altered or disconnected;
(I) Any premises having service and fire flow connections, most commercial and educational buildings, construction sites, all industrial, institutional and medical facilities, lawn irrigation systems, public or private swimming pools, private fire hydrant connections used by any fire department in combating fires, photographic laboratories, standing ponds or other bodies of water, or auxiliary water supplies;
(J) Any premises having fountains, water softeners or other point of use treatment systems, hot tubs or spas, or other type(s) of water using equipment; or
(K) Premises otherwise determined by the general manager or his or her designated representative to create an actual or potential hazard to the public water supply.
(2011 Code, § 18-309) (Ord. 06-45, passed 9- -2006)