Section 329IAC9-7-5. Methods of release detection for piping

   Each method of release detection for piping used to meet section 2 of this rule must be conducted in accordance with the following:

(1) Automatic line leak detectors. Methods that alert the operator to the presence of a leak by:

(A) restricting or shutting off the flow of regulated substances through piping; or

(B) triggering an audible or visual alarm;

may be used only if it detects leaks of at least three (3) gallons per hour at ten (10) pounds per square inch line pressure within one (1) hour. An annual test of the operation of the automatic line leak detector must be conducted in accordance with the manufacturer's requirements.

(2) Line tightness testing. A periodic line tightness test of piping may be conducted only if it can detect a one-tenth (0.1) gallon per hour leak rate at one and one-half (1½) times the operating pressure.

(3) Applicable tank methods. Any of the methods in section 4(5) through 4(8) of this rule may be used if the methods are designed to detect a release from any portion of the underground piping that routinely contains regulated substances.

(Solid Waste Management Division; 329 IAC 9-7-5; filed Jul 19, 1999, 12:00 p.m.: 22 IR 3727; readopted filed Jan 10, 2001, 3:25 p.m.: 24 IR 1535; filed Aug 30, 2004, 9:35 a.m.: 28 IR 177)