All tests and installation of mechanical devices/assemblies shall be conducted by a certified backflow technician who will be responsible for competence and accuracy of all tests, reports and installation. Such technician shall be responsible for the following:

    A.    Assure that acceptable testing equipment and procedures are used for the testing, repairing, overhauling or installation of backflow prevention assemblies;

    B.    Make reports of such testing and/or repair to the consumer, the City, and the Bureau of Drinking Water and Sanitation on a form approved for such use by the Bureau. Reporting shall be within the time allowed by the Bureau;

    C.    Include in all reports a list of any materials or replacement parts used;

    D.    Assure that replacement parts are equal in quality to original parts and that any testing, repair or replacement does not change the design or operational characteristics of the assembly;

    E.    Maintain his license in current condition and his testing equipment in proper operating condition;

    F.    Be equipped with, and competent to use, all necessary tools, gauges, and other equipment necessary to properly test and maintain backflow prevention assemblies;

    G.    Tag each double check value, pressure vacuum breaker, reduce pressure backflow assembly and high hazard air gap, showing the serial number, date tested and by whom, including the technician's license number;

    H.    For each double check valve, install and test necessary pressure reducing devices to prevent thermal expansion. (Ord. 91-02 § 9)