30 C.F.R. § 77.305 Access to drying chambers, hot gas inlet chambers and ductwork; installation and maintenance.
Title 30 - Mineral Resources
Drying chambers, hot gas inlet chambers and all ductwork in which coal dust may accumulate shall be equipped with tight sealing access doors which shall remain latched during dryer operation to prevent the emission of coal dust and the loss of fluidizing air.
Title 30: Mineral Resources
PART 77—MANDATORY SAFETY STANDARDS, SURFACE COAL MINES AND SURFACE WORK AREAS OF UNDERGROUND COAL MINES
Subpart D—Thermal Dryers
§ 77.305 Access to drying chambers, hot gas inlet chambers and ductwork; installation and maintenance.

