30 C.F.R. § 57.5038 Annual exposure limits.
Title 30 - Mineral Resources
No person shall be permitted to receive an exposure in excess of 4 WLM in any calendar year.
Title 30: Mineral Resources
PART 57—SAFETY AND HEALTH STANDARDS—UNDERGROUND METAL AND NONMETAL MINES
Subpart D—Air Quality, Radiation, Physical Agents, and Diesel Particulate Matter
Radiation—Underground Only
§ 57.5038 Annual exposure limits.
