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. Subject Group - 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)
May 28, 2026
CFR

§ 57.22231 Actions at 0.25 percent methane (I-B, II-B, V-B, and VI mines).

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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