Section 329IAC9-7-2. Requirements for petroleum UST systems

   The owner and operator of a petroleum UST system shall provide release detection for tanks and piping as follows:

(1) Tanks must be monitored at least every thirty (30) days for releases using one (1) of the methods listed in section 4(4) through 4(8) of this rule, except for the following:

(A) An UST system that meets

the performance standards in 329 IAC 9-2-1 or 329 IAC 9-2.1 may use:

(i) the monthly inventory control requirements in section 4(1) or 4(2) of this rule; and

(ii) tank tightness testing conducted under section 4(3) of this rule at least every five (5) years until December 22, 1998, or until ten (10) years after the tank is installed or upgraded under 329 IAC 9-2.1-1(b), whichever is later.

(B) An UST system that does not meet the performance standards in 329 IAC 9-2-1 or 329 IAC 9-2.1 may use:

(i) monthly inventory controls conducted under section 4(1) or 4(2) of this rule; and

(ii) annual tank tightness testing conducted under section 4(3) of this rule;

until December 22, 1998, when the tank must be upgraded under 329 IAC 9-2.1 or closed under 329 IAC 9-6-1 through 329 IAC 9-6-2.5.

(C) Tanks with capacity of five hundred fifty (550) gallons or less may use weekly tank gauging conducted under section 4(2) of this rule.

(2) Underground piping that routinely contains regulated substances must be monitored for releases in a manner that meets one (1) of the following requirements:

(A) Underground piping that conveys regulated substances under pressure must:

(i) be equipped with an automatic line leak detector under section 5(1) of this rule; and

(ii) have an annual line tightness test conducted under section 5(2) of this rule or have monthly monitoring conducted under section 5(3) of this rule.

(B) Underground piping that conveys regulated substances under suction must either have a line tightness test conducted at least every three (3) years under section 5(2) of this rule or use a monthly monitoring method under section 5(3) of this rule. No release detection is required for suction piping that is designed and constructed to meet the following standards:

(i) The below-grade piping operates at less than atmospheric pressure.

(ii) The below-grade piping is sloped so that the contents of the pipe will drain back into the storage tank if the suction is released.

(iii) Only one (1) check valve is included in each suction line.

(iv) The check valve is located directly below and as close as practical to the suction pump.

(v) A method is provided that allows compliance with items (ii) through (iv) to be readily determined.

(Solid Waste Management Division; 329 IAC 9-7-2; filed Jul 19, 1999, 12:00 p.m.: 22 IR 3724; readopted filed Jan 10, 2001, 3:25 p.m.: 24 IR 1535; filed Aug 30, 2004, 9:35 a.m.: 28 IR 174)