30 CFR 57.22238 - Actions at 2.0 percent methane (I-B, II-B, V-B, and VI mines).

U.S. Code of Federal Regulations

Regulations most recently checked for updates: Aug 28, 2025

View all text of Subpart T [§ 57.22001 - § 57.22608]

§ 57.22238 - Actions at 2.0 percent methane (I-B, II-B, V-B, and VI mines).

If methane reaches 2.0 percent in the mine atmosphere, all persons other than competent persons necessary to make ventilation changes shall be withdrawn from the mine until methane is reduced to less than 0.5 percent.