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.
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.
D.C. Mun. Regs. tit. 20, r. 20-6102