(A) A specialist employed by or under contract with the city shall determine the type of backflow assemblies to be installed within the city’s water service area. All assemblies shall be installed at the service connection unless it is determined by the specialist and approved by the Director that it should be installed at the point of use.
(B) An assembly shall be required in each of the following circumstances, but the Director is not limited to just these circumstances:
(1) When the nature and extent of any activity at a premises, or the materials used in connection with any activity at premises or materials stored at premises could contaminate or pollute the potable water supply;
(2) When a premises has one or more cross-connections as that term is defined in this subchapter;
(3) When internal cross-connections are present that is not correctable;
(4) When intricate plumbing arrangements are present that make it impractical to ascertain whether cross-connections exist;
(5) When the premises has a repeated history of cross-connections being established or reestablished;
(6) When entry to the premises is 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 an appropriate cross-connection survey report form has not been filed with the Director;
(9) Any and all used water returns systems;
(10) If a point-of-use assembly that is protecting the city’s distribution system has not been tested or repaired as required by this subchapter, the installation of a reduced pressure principle assembly will be required at the service connection at the premises owner’s expense;
(11) When there is upon the premises an auxiliary water supply that is or can be connected to the city’s or supply system;
(12) All multi-story buildings and any building with a booster pump or elevated storage tank;
(13) There is piping or equipment for conveying liquids other than potable city water and that piping or other equipment is under pressure and installed and operated in a manner that could cause a cross-connection;
(14) All services two inches or larger;
(15) When installation of an approved backflow prevention assembly is deemed by a specialist to be necessary to accomplish the purpose of these regulations; and
(16) All presently installed backflow prevention assemblies or devices which do not meet the requirements of approved backflow prevention assemblies required by O.A.R. 333-061-0070, but were approved assemblies or devices for the purpose described herein at the time of installation and which have been properly maintained, shall be allowed to remain in service, so long as they perform satisfactory and pass backflow test requirements. Whenever such existing device is moved from its present location, or the degree of hazard changes, or requires more than minimum maintenance, the device or assembly shall be replaced by a backflow prevention assembly that meets current requirements.
(Ord. 387, passed 6-12-2006)