{"data":{"id":"us/30-cfr-57.22235","jurisdiction":"us","citation":"30 CFR 57.22235","heading":"Actions at 1.0 percent methane (I-C, II-A, II-B, and IV mines).","body":"(a) If methane reaches 1.0 percent in the mine atmosphere, all persons other than competent persons necessary to make ventilation changes shall be withdrawn from affected areas until methane is reduced to less than 0.5 percent.\n(b) If methane reaches 1.0 percent at a work place and there has been a failure of the main ventilation system, all persons shall be withdrawn from the mine.","path":["Title 30—Mineral Resources","CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR","SUBCHAPTER K—METAL AND NONMETAL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 T—Safety Standards for Methane in Metal and Nonmetal Mines"],"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":"4fb2d5e548663858eb2748a37eb3b9324a90b4f49ddbc4d8d597ae41bccb20b3","source_id":"us-cfr","stale":true,"prev":"us/30-cfr-57.22234","next":"us/30-cfr-57.22236"},"notice":"GroundRules: Original legal text. Not legal advice."}