The specialist employed by or under contract with the city shall determine the type of backflow assembly to be installed within the area served by the city. All assemblies shall be installed at the service connection unless it is determined by the administrator to be acceptable at an alternate location.
The cross connection shall be eliminated or an assembly shall be required to be installed at the service connection in each of the following circumstances, but the specialist is in no way limited to the following circumstances:
A. The nature and extent of any activity on the premises, or the materials used in connection with any activity on the premises, or materials stored on the premises, could contaminate or pollute the potable water supply.
B. Premises having any one or more cross connections or potential cross connections, as that term is defined in this chapter and the WAC.
C. When a cross connection survey report form is required by the city and has not been received.
D. Internal cross connections are present that are not correctable.
E. Intricate plumbing arrangements exist or plumbing subject to frequent changes are present that make it impractical to ascertain whether or not cross connections exist.
F. There is a repeated history of cross connections being established or reestablished.
G. There is unduly restricted entry so that evaluations for cross connections cannot be made with sufficient frequency to assure that cross connections do not exist.
H. Materials, chemicals or any substance or apparatus is being used that if backflow occurred contamination would result.
I. Installation of an approved backflow prevention assembly is deemed to be necessary in the judgment of the specialist/administrator to accomplish the purpose of this chapter.
J. Any premises having an auxiliary water supply.
K. In the event an in premises assembly has not been tested or repaired or is not commensurate with the specialist's assessed degree of hazard as required by the WAC 246-290-490, or as amended, and this chapter.
L. If it is determined that additions or rearrangements have been made to the plumbing system without obtaining proper permits as required by the city's building code enforcement division.
M. When a garden hose attachment is connected to the following, including, but not limited to: fertilizer applicators, pesticide applicators, radiator flush kits, and there is not appropriate in premises protection.
N. Wherever the potential of backpressure or backsiphonage exists.
O. Wherever used or reclaimed water is used on premises. (Ord. 819, 2-21-2007)