30 C.F.R. § 77.1901-1 Methane and oxygen deficiency tests; approved devices.
Title 30 - Mineral Resources
Tests for oxygen deficiency shall be made with a permissible flame safety lamp or other means approved by the Secretary, and tests for methane shall be made with a methane detector approved by the Secretary.
Title 30: Mineral Resources
PART 77—MANDATORY SAFETY STANDARDS, SURFACE COAL MINES AND SURFACE WORK AREAS OF UNDERGROUND COAL MINES
Subpart T—Slope and Shaft Sinking
§ 77.1901-1 Methane and oxygen deficiency tests; approved devices.
