['Specialized Industries']

['Mining']

07/19/2025

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§57.22235 Actions at 1.0 percent methane (I-C, II-A, II-B, and IV mines).

...

§57.22235 Actions at 1.0 percent methane (I-C, II-A, II-B, and IV mines).

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

(a) If methane reaches 1.0 percent in the mine atmoshpere, all persons other than competent persons necessary to make ventilation changes shall be withdrawn from affected areas until methane is reduced to less than 0.5 percent.

(b) If methane reaches 1.0 percent at a work place and there has been a failure of the main ventilation system, all persons shall be withdrawn from the mine.

['Specialized Industries']

['Mining']

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