Code of Federal Regulations · Section
§ 57.22608 — Secondary Blasting (i-a, Ii-a, And V-a Mines)
30 C.F.R. § 57.22608
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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.
Authorizing Statute
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Mandatory safety and health standards30 U.S.C. § 811