30 C.F.R. § 57.4463 Liquefied petroleum gas use underground.
Title 30 - Mineral Resources
Use of liquefied petroleum gases underground shall be limited to maintenance work.
Title 30: Mineral Resources
PART 57—SAFETY AND HEALTH STANDARDS—UNDERGROUND METAL AND NONMETAL MINES
Subpart C—Fire Prevention and Control
Flammable and Combustible Liquids and Gases
§ 57.4463 Liquefied petroleum gas use underground.
