1515 112TH ST SE BASE FILE 2018-01-02 MF Import

Sec. 7902.6.16.2 New tanks. New underground tanks shall be tested for tightness hydrostatically or pneumatically at not less than 3 pounds per square inch (20.7 kPa) and not more than 5 pounds per square inch (34.5 kPa) for 30 minutes. Pneumatic testing shall not be used on a tank containing flammable or combustible liquids or vapors. When secondary containment tanks are required in accordance with Section 7902.6.11, they shall be tested in accordance with the manufacturer's instructions. Both the primary and secondary containment shall be tested. Sec. 7902.6.16.3 Existing tanks and piping. Existing underground storage tanks and piping shall be tested for leakage at the owner's or operator's expense when the chief has reasonable cause to believe that a leak exists. Orders by the chief requiring testing on underground tanks or piping shall indicate that the test be completed by a specified date. Tanks shall be emptied of flammable or combustible liquids, and piping and other equipment shall not be used if required tests are not completed within the specified time. When testing is required, owners or operators shall provide the chief with data setting forth the method of testing that is to be used and shall submit the name of a qualified individual who will conduct the test. The method of testing to be used shall consider the effects of temperature, pressure and other variables and shall establish conclusively whether the tank or piping is leaking. Pneumatic testing shall not be used for tanks. Devices used for final testing of tanks shall be capable of detecting leaks as small as 0.05 gallon per h.,ur (0.19 L/hr). Leaking piping and equipment shall not be used until repaired or replaced. The chief is authorized to require that the test be conducted in the chief's presence. Sec. 7902.6.16.4 Used tanks. 1 Ned tanks intended for flammable or combustible liquid service shall be tested as reruired for new tanks.