{"data":{"id":"us/30-cfr-57.22608","jurisdiction":"us","citation":"30 CFR 57.22608","heading":"Secondary blasting (I-A, II-A, and V-A mines).","body":"Prior to secondary blasting, tests for methane shall be made in the mine atmosphere at blast sites by a competent person. Secondary blasting shall not be done when 0.5 percent or more methane is present.","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":"bf1d84f81e9ac9bdf925dcc21b80464b480edc33755b90d03eeeab98352f9bea","source_id":"us-cfr","stale":true,"prev":"us/30-cfr-57.22607","next":"us/30-cfr-appendix-i-to-subpart-t-of-part-57"},"notice":"GroundRules: Original legal text. Not legal advice."}