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§ 57.5015 Oxygen deficiency.

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Title 30—Mineral Resources > CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR > SUBCHAPTER K—METAL AND NONMETAL MINE SAFETY AND HEALTH > PART 57—SAFETY AND HEALTH STANDARDS—UNDERGROUND METAL AND NONMETAL MINES > Subpart D—Air Quality, Radiation, Physical Agents, and Diesel Particulate Matter > Air Quality—Underground Only

This text was captured on Sep 22, 2026. It is a snapshot, not a live feed, so check the official code before relying on it.

Text

Air in all active workings shall contain at least 19.5 volume percent oxygen.

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