{"data":{"id":"us/30-cfr-57.22226","jurisdiction":"us","citation":"30 CFR 57.22226","heading":"Testing for methane (IV mines).","body":"Tests for methane shall be conducted in the mine atmosphere by a competent person—\n(a) At least once each shift prior to starting work in each face and raise; and\n(b) Upon initial release of gas into the mine atmosphere from boreholes.","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":"5c74f20695046739262dfc103519ac4fe4aa8161256915d3eb0f6c8e74eac149","source_id":"us-cfr","stale":true,"prev":"us/30-cfr-57.22225","next":"us/30-cfr-57.22227"},"notice":"GroundRules: Original legal text. Not legal advice."}