30 C.F.R. § 57.5015
Current through October 31, 2024
Air in all active workings shall contain at least 19.5 volume percent oxygen.
30 C.F.R. §57.5015
Title 30 - MINERAL RESOURCESChapter I - MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABORSubchapter K - METAL AND NONMETAL MINE SAFETY AND HEALTHPart 57 - SAFETY AND HEALTH STANDARDS-UNDERGROUND METAL AND NONMETAL MINESSubpart D - AIR QUALITY, RADIATION, PHYSICAL AGENTS, AND DIESEL PARTICULATE MATTER