Section 329IAC9-7-3. Requirements for hazardous substance UST systems

   The owner and operator of a hazardous substance UST system shall provide release detection that meets the following requirements:

(1) Release detection at an existing UST system must meet the requirements for a petroleum UST system in section 2 of this rule. By December 22, 1998, all existing hazardous substance UST systems shall meet the release detection requirements for a new system in subdivision (2).

(2) Release detection at a new hazardous substance UST system must meet the following requirements:

(A) Secondary containment systems must be designed, constructed, and installed to complete the following:

(i) Contain regulated substances released from the tank system until they are detected and removed.

(ii) Prevent the release of regulated substances to the environment at any time during the operational life of the UST system.

(iii) Be checked for evidence of a release at least every thirty (30) days.

(B) Double-walled tanks must be designed, constructed, and installed to complete the following:

(i) Contain a release from any portion of the inner tank within the outer wall.

(ii) Detect the failure of the inner wall.

(C) External liners, including vaults, must be designed, constructed, and installed to complete the following:

(i) Contain one hundred percent (100%) of the capacity of the largest tank within its boundary.

(ii) Prevent the interference of precipitation or ground water intrusion with the ability to contain or detect a release of regulated substances.

(iii) Surround the tank completely so that the external liners, including vaults, are capable of preventing lateral as well as vertical migration of regulated substances.

(D) Underground piping must be equipped with secondary containment that satisfies the requirements of clause (A) and may include either of the following:

(i) Trench liners.

(ii) Jacketing of double-walled pipe.

In addition, underground piping that conveys regulated substances under pressure must be equipped with an automatic line leak detector under section 5(1) of this rule.

(E) Other methods of release detection may be used if the owner and operator complete the following:

(i) Demonstrate to the commissioner that an alternate method can detect a release of the stored substance as effectively as any of the methods under section 4(2) through 4(8) of this rule can detect a release of petroleum.

(ii) Provide information to the commissioner on effective corrective action technologies, health risks, and chemical and physical properties of the stored substance, and the characteristics of the UST site.

(iii) Obtain approval from the commissioner to use the alternate release detection method before the installation and operation of the new UST system.

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