30 CFR Part 56Public Domain
§ 56.7807 — Flushing the combustion chamber
Subpart F — Drilling and Rotary Jet Piercing
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.
Public Domain: 30 CFR Part 56 (MSHA Safety and Health Standards — Surface Metal and Nonmetal Mines) is a U.S. government publication and is not subject to copyright. Text extracted from the official source ↗. Figures are served from the eCFR; if one does not load, use the link in its place.