(A) An approved backflow prevention device shall be installed between the service connection and the point of potential backflow into a consumer’s water supply system when, in the judgment of the city or authorized representative, a health, plumbing, pollution, or system hazard exists.
(B) An approved air gap separation or reduced pressure principle backflow prevention device shall be installed at the service connection or within any premises where, in the judgment of the City Water Department, the nature and extent of activities on the premises, or the materials used in connection with the activities, or materials stored on the premises, would present an immediate and dangerous hazard to health should a cross-connection occur; even though such cross-connection may not exist at the time the backflow prevention device is required to be installed. This includes, but is not limited to, the following situations:
(1) Premises having an auxiliary water supply, unless the quality of the auxiliary supply is acceptable to the city or its authorized representative and the State Department of Health;
(2) Premises having internal cross-connections that are not correctable, or intricate plumbing arrangements, which make it impractical to ascertain whether or not cross-connections exist;
(3) Premises where entry is restricted so that inspections for cross-connections cannot be made with sufficient frequency or at sufficiently short notice to assure the cross-connections do not exist;
(4) Premises having a repeated history of cross-connections being established or re-established;
(5) Premises, which due to the nature of the enterprise therein, are subject to recurring modification or expansion;
(6) Premises on which any substance is handled under pressure so as to permit entry into the public water supply system or where a cross connection could reasonably be expected to occur. This shall include the handling of process waters and cooling waters; and
(7) Premises where toxic or hazardous materials are handled.
(C) The following types of facilities fall into one or more of the categories or premises where an approved air gap separation or reduced pressure principle backflow prevention device may be required by the city, or its authorized representative, or the State Department of Health to protect the public water supply and must be installed at these facilities, unless all hazardous or potentially hazardous conditions have been eliminated or corrected by other methods to the satisfaction of the city or its authorized representative and the State Department of Health:
(1) Agricultural chemical facilities;
(2) Auxiliary water systems, wells;
(3) Premises having water re-circulating system as used for boilers or cooling systems;
(4) Bulk water loading facilities;
(5) Car washes, automobile servicing facilities;
(6) Chill water systems;
(7) Feedlots;
(8) Fire protection systems;
(9) Hazardous waste storage and disposal sites;
(10) Irrigation and lawn sprinkler systems capable of chemical injection;
(11) Laundries and dry cleaning;
(12) Petroleum processing or storage plants;
(13) Beauty salons;
(14) Schools;
(15) Sewage pumping stations; and
(16) Other commercial or industrial facilities which may constitute potential cross-connection.
(Prior Code, § 3-123)