Section 18 AAC 78.070 - Release detection methods for piping(a)General requirement. Each method of release detection for piping used to meet the requirements of 18 AAC 78.060 must be conducted as required under this section.(b)Automatic line leak detection. An automatic leak detection method that alerts the operator to the presence of a leak by restricting or shutting off the flow of petroleum through piping or by triggering an audible or visual alarm may be used only if that method is capable of detecting a leak of three gallons per hour at I 0 pounds per square inch line pressure within one hour. An annual test of the operation of the leak detector must be conducted in accordance with 18 AAC 78.060(a)(5). A stand-alone sump sensor is not sufficient to meet this requirement.(c)Line tightness testing. A periodic tightness test of piping may be conducted only if the tightness test is capable of detecting a 0.1 gallon per hour leak rate at one and one-half times the line's normal operating pressure. The test must be performed by a person certified under this chapter. Where a line leak detector is in stalled on the piping that has the same leak detection capability as the tightness test specified in 18 AAC 78.065(d), the tightness test may be omitted. (d)Applicable tank methods. Except as described in 18 AAC 78.060(e), any monitoring method set out in 18 AAC 78.065(f) - (j) may be used if that method is designed to detect a release from any part of the underground piping that routinely contains petroleum and that method is used monthly.Eff. 3/25/91, Register 118; am 11/3/95, Register 136; am 1/30/2003, Register 165; am 9/27/2018,Register 227, October 2018Authority:AS 46.03.020
AS 46.03.365
AS 46.03.375