30 C.F.R. § 57.22210 In-line filters (I-C mines).
Title 30 - Mineral Resources
Filters or separators shall be installed on air-lift fan systems to prevent explosive concentrations of dust from passing through the fan.
Title 30: Mineral Resources
PART 57—SAFETY AND HEALTH STANDARDS—UNDERGROUND METAL AND NONMETAL MINES
Subpart T—Safety Standards for Methane in Metal and Nonmetal Mines
Ventilation
§ 57.22210 In-line filters (I-C mines).
