30 C.F.R. § 77.211-1 Continuous methane monitoring device; installation and operation; automatic deenergization of electric equipment.
Title 30 - Mineral Resources
Continuous methane monitoring devices shall be set to deenergize automatically electric equipment when such monitor is not operating properly and to give a warning automatically when the concentration of methane reaches a maximum percentage determined by an authorized representative of the Secretary which shall not be more than 1.0 volume per centum of methane. An authorized representative of the Secretary shall require such monitor to deenergize automatically electric equipment when the concentration of methane reaches a maximum percentage determined by such representative which shall not be more than 2.0 volume per centum of methane.
Title 30: Mineral Resources
PART 77—MANDATORY SAFETY STANDARDS, SURFACE COAL MINES AND SURFACE WORK AREAS OF UNDERGROUND COAL MINES
Subpart C—Surface Installations
§ 77.211-1 Continuous methane monitoring device; installation and operation; automatic deenergization of electric equipment.
