U.S. Code of Federal Regulations

Regulations most recently checked for updates: Aug 28, 2025

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]
§ 57.5038 - Annual exposure limits.

No person shall be permitted to receive an exposure in excess of 4 WLM in any calendar year.

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