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

---
identifier: "/us/cfr/t30/s57.22238"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "30 CFR § 57.22238 - Actions at 2.0 percent methane (I-B, II-B, V-B, and VI mines)."
title_number: 30
title_name: "Mineral Resources"
section_number: "57.22238"
section_name: "Actions at 2.0 percent methane (I-B, II-B, V-B, and VI mines)."
chapter_name: "MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR"
subchapter_number: "K"
subchapter_name: "METAL AND NONMETAL MINE SAFETY AND HEALTH"
part_number: "57"
part_name: "SAFETY AND HEALTH STANDARDS—UNDERGROUND METAL AND NONMETAL MINES"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "30 U.S.C. 811."
regulatory_source: "50 FR 4082, Jan. 29, 1985, unless otherwise noted."
cfr_part: "57"
---


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in the mine atmosphere, all persons other than competent persons necessary to make ventilation changes shall be withdrawn from the mine until methane is reduced to less than 0.5 percent.