(a) A certified cross-connection inspector employed by or under contract with the city shall determine the type and location of backflow assembly to be installed within the city’s water service area. This does not include wholesale customers or their water users.
(b) At a minimum, a backflow prevention assembly will be required in each of the following circumstances:
(1) When the nature and extent of any activity at a premises, or the materials used in connection with any activity at a premises, or materials stored at a premises, could contaminate or pollute the potable water supply;
(2) When a premises has one or more cross-connections;
(3) When internal cross-connections are present that are not correctable;
(4) When intricate plumbing arrangements are present that make it impractical to ascertain whether cross-connections exist;
(5) When a premises has a repeated history of cross-connections being established or re-established;
(6) When entry to a premises is unduly restricted so that inspections for cross-connections cannot be made with sufficient frequency to assure that cross-connections do not exist;
(7) When materials are being used such that, if backflow should occur, a health hazard could result;
(8) When installation of an approved backflow prevention assembly is deemed by an inspector to be necessary to accomplish the purpose of these regulations;
(9) When an appropriate cross-connection survey report form has not been filed with the director;
(10) When a fire sprinkler system using nonpotable piping material is connected to the city’s water system;
(11) In all new nonresidential construction there shall be installed an approved backflow assembly at the service connection. The type of the assembly will be commensurate with the degree of hazard as determined by an inspector;
(12) When a building is constructed on commercial premises, and the end use of such building is not determined or could change, a reduced pressure principle backflow prevention assembly shall be installed at the service connection to provide protection of the public water supply in the event of the most hazardous use of the building;
(13) If a premises is required to have backflow prevention assemblies, but water cannot be turned off during the testing of such assemblies, the premises shall be equipped with dual backflow prevention assemblies of the same type so that testing, repair and maintenance can be performed;
(14) Any used water return system that has received approval from the director;
(15) If a point-of-use assembly has not been tested or repaired as required by this division, a premises isolation assembly shall be required;
(16) If an inspector determines that additions or rearrangements have been made to the plumbing system without the proper permits as required by the plumbing code, premises isolation shall be required;
(17) All multistory buildings or any building with a booster pump or elevated storage tank; and
(18) Retrofitting shall be required on all high hazard connections and wherever else the director deems retrofitting necessary.
(c) Any premises requiring multiple service connections for adequacy of supply and/or fire protection shall have a backflow assembly on each service connection. The assembly shall be commensurate with the degree of potential hazard that could occur in the event of an interconnect between any of the buildings on the premises.
(d) A person commits an offense if the person owns or is in control of any premises and knowingly fails to install and maintain backflow prevention assemblies on said premises as required by this section.
(e) A person commits an offense if the person owns, operates or manages any premises and backflow from the premises enters the public water supply system.
(Ord. 12274, § 1, passed 11-28-1995)