C.F.R. » Title 30 » CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR › SUBCHAPTER M—UNIFORM MINE HEALTH REGULATIONS › PART 60—RESPIRABLE CRYSTALLINE SILICA

30 C.F.R. § 60.10

Permissible exposure limit (PEL)

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The mine operator shall ensure that no miner is exposed to an airborne concentration of respirable crystalline silica in excess of 50 µg/m 3 for a full-shift exposure, calculated as an 8-hour TWA.