---
kind: "section"
citation: "30 C.F.R. § 57.22306"
title: "30"
number: "57.22306"
heading: "Methane monitors (I-A mines)."
url: "https://uscodex.org/cfr/30/57.22306"
---

# §57.22306. Methane monitors (I-A mines).

- (a) Methane monitors shall be installed on continuous mining machines, longwall mining systems, and on loading and haulage equipment used in or beyond the last open crosscut.
- (b) **The monitors shall—**
  - (1) Give warning at 1.0 percent methane;
  - (2) Automatically deenergize electrical equipment, except power to monitoring equipment determined by MSHA to be intrinsically safe under [30 CFR part 18](/cfr/30/part18.md), and prevent starting such equipment when methane levels reach 1.5 percent. Diesel equipment shall be shut off or immediately removed from the affected area; and
  - (3) **Automatically deenergize electrical equipment when power to a sensor is interrupted.** Diesel equipment shall not be operated if the monitor is inoperative.
- (c) Sensing units of monitors shall be positioned at a location which provides for the most effective measurement of methane.

## 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.