30 C.F.R. § 57.8528 Unventilated areas.
Title 30 - Mineral Resources
Unventilated areas shall be sealed, or barricaded and posted against entry.
Title 30: Mineral Resources
PART 57—SAFETY AND HEALTH STANDARDS—UNDERGROUND METAL AND NONMETAL MINES
Subpart G—Ventilation
Underground Only
§ 57.8528 Unventilated areas.
