7 Del. Admin. Code § 1352-B-9.0

Current through Register Vol. 28, No. 7, January 1, 2025

Section 1352-B-9.0 - Leak Detection Requirements

9.1 General Requirements for Leak Detection

9.1.1 A leak of regulated substances shall be detected and contained before contamination of soil outside the containment area or water resources occurs.

9.1.2 New ASTs shall have a method, or combination of methods, of leak detection that can detect a leak from any portion of the AST. Leak detection methods shall be separate from the method utilized to comply with the requirements for overfill prevention in PART B, Section 8.

9.1.3 Leak detection methods shall be installed, calibrated, tested, operated, and maintained in accordance with the manufacturer's instructions, including routine maintenance checks for operability to ensure that the device is functioning as designed.

9.1.4 All manufacturers' instructions, and the performance claims and their manner of determination described in writing by the equipment manufacturer or installer shall be retained at the Facility for the life of the AST.

9.1.5 Leak detection systems require approval by the Department prior to installation. A leak detection response level shall be described in writing for each method or combination of methods of leak detection used for an AST.

9.1.6 The leak detection method or combination of methods used shall be capable of being inspected at least every 7 days to determine if a leak from the AST has occurred.

9.1.7 Any interstitial spaces, including those located in double-walled ASTs, double-walled piping, and double bottoms that are installed as part of a new or an upgraded AST, shall be equipped with interstitial monitoring equipment capable of detecting a discharge of a regulated substance into the interstitial space under all operating conditions.

9.1.8 The requirements of PART B, subsection 9.1.2, PART B, subsection 9.1.6 and PART B, subsection 9.1.7 shall not apply to double-walled ASTs that are not in contact with the soil and that additionally meet the requirements for secondary containment in accordance with PART B, Section 7.0.

7 Del. Admin. Code § 1352-B-9.0

8 DE Reg. 1167 (02/01/05)
20 DE Reg. 815 (4/1/2017)
27 DE Reg. 536 (1/1/2024) (Final)