30 CFR 57.22608 - Secondary blasting (I-A, II-A, and V-A mines).

Code of Federal Regulations - Title 30: Mineral Resources

Updated to: July 01, 2010

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Title 30: Mineral Resources

CHAPTER I: MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR

SUBCHAPTER K: METAL AND NONMETAL MINE SAFETY AND HEALTH

PART 57: SAFETY AND HEALTH STANDARDS-UNDERGROUND METAL AND NONMETAL MINES

Subpart T: Safety Standards for Methane in Metal and Nonmetal Mines

: Explosives

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.