30 C.F.R. § 57.22226 Testing for methane (IV mines).
Title 30 - Mineral Resources
Tests for methane shall be conducted in the mine atmosphere by a competent person— (a) At least once each shift prior to starting work in each face and raise; and (b) Upon initial release of gas into the mine atmosphere from boreholes.
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
Ventilation
§ 57.22226 Testing for methane (IV mines).
