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Code of Federal Regulations (Last Updated: November 8, 2024) |
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Title 30 - Mineral Resources |
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Chapter I - Mine Safety and Health Administration, Department of Labor |
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SubChapter K - Metal and Nonmetal Mine Safety and Health |
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Part 57 - Safety and Health Standards - Underground Metal and Nonmetal Mines |
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Subpart T - Safety Standards for Methane in Metal and Nonmetal Mines |
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Ventilation |
§ 57.22231 - Actions at 0.25 percent methane (I-B, II-B, V-B, and VI mines).
Latest version.
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§ 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.