R 425.35 Acid-forming, toxic, flammable, or combustible material.

Rule 35. All acid-forming, toxic, flammable, or combustible material from the mining process shall be stockpiled so as to minimize erosion by air and water and to prevent pollution of the air and surface and ground water. Preventive measures required by the supervisor may include covering the piles with clean fill or mixing with them a material that is not acid-forming, toxic, flammable, or combustible and graded so that surface water drains away from disposal area.