Regulations last checked for updates: Nov 25, 2024

Title 30 - Mineral Resources last revised: Nov 19, 2024
All TitlesTitle 30Chapter IPart 57Subpart D - Subpart D—Air Quality, Radiation, Physical Agents, and Diesel Particulate Matter
View all text of Subpart D [§ 57.5001 - § 57.5075]
§ 57.5039 - Maximum permissible concentration.

Except as provided by standard § 57.5005, persons shall not be exposed to air containing concentrations of radon daughters exceeding 1.0 WL in active workings.

authority: 30 U.S.C. 811.
source: 50 FR 4082, Jan. 29, 1985, unless otherwise noted.
cite as: 30 CFR 57.5039
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