['Specialized Industries']

['Mining']

07/19/2025

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

...

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

RegSense CFR Regulations Mining Specialized Industries CFR Section English Focus Area USA

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

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.

['Specialized Industries']

['Mining']

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