30 CFR § 57.20005 Safety and Health Standards—Underground Metal and Nonmetal Mines§ 57.20005 Carbon tetrachloride.Current through Jul 27, 2026 · Read all of Part 57⚠ 1 pending change to Part 57Powered Air Purifying Respirators (PAPRs) in Underground MinesProposed Rule · comments close Dec 8, 2026 · Labor DepartmentCarbon tetrachloride shall not be used.