§ 57.22236. Actions at 1.0 percent methane (VI mines).
35 words·~1 min read·
/us/cfr/t30/s§ 57.22236·A research copy — for the controlling text, always check the official state or federal source. Not legal advice.
If methane reaches 1.0 percent in the mine atmosphere, all persons other than competent persons necessary to make ventilation changes shall be withdrawn from affected areas until methane is reduced to less than 0.5 percent.