Regulation .04 Applicability to Previously Closed UST Systems.

When directed by the Department, an owner and an operator of a UST system that was permanently closed before December 22, 1988 shall assess the excavation zone and close the UST system in accordance with this chapter if a spill, release, or discharge from the UST system may, in the judgment of the Department, pose a current or potential threat to human health and the environment.