D.C. Mun. Regs. tit. 20, § 6102
6102.1 If the Department determines that any release or suspected release from an UST system that was closed-in-place, removed, or temporarily closed poses a current or potential threat to human health and the environment, the Department may direct a responsible party to assess the excavation zone and take appropriate corrective action, including closure of the UST system in accordance with § 6101 if it is not already permanently closed.
6102.2 If the Department determines that an UST system has not been temporarily closed or closed-in-place in accordance with this chapter, the Department may direct a responsible party to permanently close the UST system and assess the excavation zone in accordance with § 6101.
SOURCE: Final Rulemaking published at 40 DCR 7835 (November 12, 1993); as amended by Final Rulemaking published at 46 DCR 7699 (October 1, 1999); as amended by Final Rulemaking published at 67 DCR 1778 (February 21, 2020).