The owner or operator of each hazardous substance UST system shall provide release detection that meets the requirements of this section.
Each hazardous substance UST system shall use secondary containment with interstitial monitoring in accordance with § 6011.
The owner or operator shall check the secondary containment system for evidence of a release at least every thirty (30) days.
The owner or operator shall test the secondary containment system every three (3) years to ensure that the interstitial area is liquid-tight or use continuous monitoring methods.
For hazardous substance UST systems installed on or before February 8, 2007, the Department may approve an alternative method of release detection for a hazardous substance UST system if the owner or operator submits a request in accordance with § 5500.5 and:
D.C. Mun. Regs. tit. 20, r. 20-6002