Title 30

SECTION 57.22231

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).

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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