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 T - Safety Standards for Methane in Metal and Nonmetal Mines
  7. Topic - Ventilation
  8. 30 CFR § 57.22231
30 CFR § 57.22231
Actions at 0.25 percent methane (I-B, II-B, V-B, and VI mines)
July 29, 2020
CFR

If methane reaches 0.25 percent in the mine atmosphere, changes shall be made to improve ventilation, and MSHA shall be notified immediately.

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§ 57.22230 Weekly testing (II-A mines)
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§ 57.22232 Actions at 0.5 percent methane (I-B, II-A, II-B, IV, V-B, and VI mines)

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