---
kind: "section"
citation: "30 C.F.R. § 57.22608"
title: "30"
number: "57.22608"
heading: "Secondary blasting (I-A, II-A, and V-A mines)."
url: "https://uscodex.org/cfr/30/57.22608"
---

# §57.22608. Secondary blasting (I-A, II-A, and V-A mines).


Prior to secondary blasting, tests for methane shall be made in the mine atmosphere at blast sites by a competent person. Secondary blasting shall not be done when 0.5 percent or more methane is present.


## 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.