When directed by the department, the owner and operator of an UST system with field-constructed tanks, airport hydrant system, or hybrid storage tank system permanently closed before the effective date of these regulations must assess the excavation zone and close the storage tank system in accordance with 20.5.115 NMAC if releases from the storage tank system may, in the judgment of the department, pose a current or potential threat to human health and the environment.
N.M. Admin. Code § 20.5.114.1411