(A) An approved backflow prevention device shall be installed in the service connection line to a consumer’s water system or within any premises where, in the judgment of the Municipal Water Department, actual or potential hazards to the public potable water system exists. The type and degree of protection required shall be commensurate with the degree of hazard.
(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 Municipal 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 Municipal Water Department;
(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 that, although not covered by code, are subject to frequent modification which would change their status or premises that have had backflow code violations;
(5) Premises on which any substance is handled under pressure so as to permit entry into the public water supply or where a cross-connection could reasonably be expected to occur. This shall include the handling of process waters and cooling waters; and/or
(6) Premises where materials of a toxic or hazardous nature are handled such that if backsiphonage or backpressure should occur, a serious health hazard may result.
(Ord. 448, passed 10-6-1992)