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30 CFR 57.22232

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

United States · 30 CFR — Mineral Resources · Status: effective

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30 CFR 57.22232, § 57.22232 Actions at 0.5 percent methane (I-B, II-A, II-B, IV, V-B, and VI mines), United States, version 1 as recorded 2026-07-09, yourstate.us, https://yourstate.us/provision/133258
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If methane reaches 0.5 percent in the mine atmosphere, ventilation changes shall be made to reduce the level of methane. Until methane is reduced to less than 0.5 percent, electrical power shall be deenergized in affected areas, except power to monitoring equipment determined by MSHA to be intrinsically safe under 30 CFR part 18. Diesel equipment shall be shut off or immediately removed from the area and no other work shall be permitted in affected areas.

Legislative history

This is a federal regulation, adopted through agency rulemaking under the Administrative Procedure Act — not enacted by a recorded vote of Congress.