1. LawStack
  2. Title 30 - Mineral Resources
  3. Chapter I - MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR
  4. Subchapter K - METAL AND NONMETAL MINE SAFETY AND HEALTH
  5. Part 57 - SAFETY AND HEALTH STANDARDS—UNDERGROUND METAL AND NONMETAL MINES
  6. Subpart D - Air Quality, Radiation, Physical Agents, and Diesel Particulate Matter
  7. Topic - Air Quality—Surface Only [Reserved]
  8. Subtopic - Air Quality—Underground Only
  9. 30 CFR § 57.5015
30 CFR § 57.5015
Oxygen deficiency
July 29, 2020
CFR

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

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