An underground storage project for which an underground storage permit is granted may not be abandoned, or a natural or artificial opening extending from the underground storage area to the ground surface be filled, sealed, or otherwise closed to inspection, except after written approval by the commissioner of natural resources and in compliance with conditions that the commissioner may impose.
Minn. Stat. § 103I.685
1989 c 326 art 3 s 42; 1990 c 597 s 48