30 C.F.R. § 57.7807 Flushing the combustion chamber.
Title 30 - Mineral Resources
The combustion chamber of a jet drill stem which has been sitting unoperated in a drill hole shall be flushed with a suitable solvent after the stem is pulled up.
Title 30: Mineral Resources
PART 57—SAFETY AND HEALTH STANDARDS—UNDERGROUND METAL AND NONMETAL MINES
Subpart F—Drilling and Rotary Jet Piercing
Rotary Jet Piercing—Surface Only
§ 57.7807 Flushing the combustion chamber.
