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§ 57.5039 Maximum permissible concentration.

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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 > Radiation—Underground Only

This text was captured on Sep 22, 2026. It is a snapshot, not a live feed, so check the official code before relying on it.

Text

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.

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