['Specialized Industries']

['Mining']

07/19/2025

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

...

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

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

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

['Specialized Industries']

['Mining']

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