{"data":{"id":"us/30-cfr-57.5042","jurisdiction":"us","citation":"30 CFR 57.5042","heading":"Revised exposure levels.","body":"If levels of permissible exposures to concentrations of radon daughters different from those prescribed in 57.5038 are recommended by the Environmental Protection Agency and approved by the President, no employee shall be permitted to receive exposures in excess of those levels after the effective dates established by the Agency.","path":["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"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-30.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:25:24Z","sha256":"a977e5a7fae3df40afe39c90a24070a16def5d8171652cbae0a10b27ae50ae90","source_id":"us-cfr","stale":true,"prev":"us/30-cfr-57.5041","next":"us/30-cfr-57.5044"},"notice":"GroundRules: Original legal text. Not legal advice."}