Section 29.2126. Methods of release detection for piping.

Section 280.44 is amended to read as follows:

Section 280.44. Each method of release detection for piping used to meet the requirements of section 280.41 shall be conducted in accordance with all of the following provisions:

(a)     Automatic line leak detectors. A methods that alerts the operator to the presence of a leak by restricting or shutting off the flow of regulated substances through piping or triggering an audible or visual alarm may be used only if the method detects leaks of 3 gallons per hour at 10 pounds per square inch line pressure within 1 hour. An annual test of the operation of the leak detector shall be conducted in accordance with the  manufacturer's requirements.

(b)     With respect to line tightness  testing, both of the following provisions:

(1)   Line tightness testing shall be capable of detecting a 0.1 gallons per hour leak rate at 1 1/2 times the operating pressure.

(2)   Secondary containment piping shall be tested by a positive pressure of not less than 5 psig for a minimum of 1 hour.

(c)   Applicable tank methods. Any of the methods in section 280.43(e)  to (h) may be used if they are designed to detect a release from any portion of the underground piping that routinely contains regulated substances.

History: 1998-2000 AACS.