---
kind: "section"
citation: "30 C.F.R. § 57.22238"
title: "30"
number: "57.22238"
heading: "Actions at 2.0 percent methane (I-B, II-B, V-B, and VI mines)."
url: "https://uscodex.org/cfr/30/57.22238"
---

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in the mine atmosphere, all persons other than competent persons necessary to make ventilation changes shall be withdrawn from the mine until methane is reduced to less than 0.5 percent.


## Notes

### Authority

Authority: 30 U.S.C. 811.

### Source

Source: 52 FR 24941, July 1, 1987, unless otherwise noted.

### Authority

Authority: 30 U.S.C. 811.

### Source

Source: 50 FR 4082, Jan. 29, 1985, unless otherwise noted.