Code of Federal Regulations (Last Updated: May 6, 2024) |
Title 30 - Mineral Resources |
Chapter I—Mine Safety and Health Administration, Department of Labor |
SubChapter K—Metal and Nonmetal Mine Safety and Health |
Part 57 - Safety and Health Standards—Underground Metal and Nonmetal Mines |
Subpart D - Air Quality, Radiation, Physical Agents, and Diesel Particulate Matter |
Air Quality—Surface and Underground |