Montana Title 75. Environmental Protection § 75-10-1401. Definitions

(1) “Department” means the department of environmental quality provided for in 2-15-3501.

(2) “Mine waste” means soil, rock, and other earthen materials excavated from a mine and slimes, tailings, dusts, sludges, or other waste products from the crushing, cleaning, milling, or beneficiation of ores or other mineral-bearing materials, including material that may have migrated from its original place of deposition by erosion or human transit, and that contain hazardous or deleterious substances.

(3) “Smelter waste” means cinders, clinker, slag, and other waste products from the reduction of ores by any means, including material that may have migrated from its original place of deposition by erosion, and that contain hazardous or deleterious substances.