30 C.F.R. § 75.401-1 Excessive amounts of dust.
Title 30 - Mineral Resources
The term “excessive amounts of dust” means coal and float coal dust in the air in such amounts as to create the potential of an explosion hazard.
Title 30: Mineral Resources
PART 75—MANDATORY SAFETY STANDARDS—UNDERGROUND COAL MINES
Subpart E—Combustible Materials and Rock Dusting
§ 75.401-1 Excessive amounts of dust.
