30 C.F.R. § 57.22607 Blasting on shift (III mines).
Title 30 - Mineral Resources
When blasting on shift, tests for methane shall be made in the mine atmosphere by a competent person before blasting. Blasting shall not be done when 1.0 percent or more methane is present.
Title 30: Mineral Resources
PART 57—SAFETY AND HEALTH STANDARDS—UNDERGROUND METAL AND NONMETAL MINES
Subpart T—Safety Standards for Methane in Metal and Nonmetal Mines
Explosives
§ 57.22607 Blasting on shift (III mines).
