Md. Code, Environment § 9–215

(a) When landfill operations end, the holder of a permit issued under this subtitle for a landfill system shall close and cover all of the land for which the permit was issued in a manner that prevents:

(1) Erosion;

(2) Health and safety hazards;

(3) Nuisances; and

(4) Pollution.

(b) The Department shall adopt regulations that set standards for the closing and covering of landfill systems.