{"data":{"id":"us/30-cfr-77.201","jurisdiction":"us","citation":"30 CFR 77.201","heading":"Methane content in surface installations.","body":"The methane content in the air of any structure, enclosure or other facility shall be less than 1.0 volume per centum.","path":["Title 30—Mineral Resources","CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR","SUBCHAPTER O—COAL MINE SAFETY AND HEALTH","PART 77—MANDATORY SAFETY STANDARDS, SURFACE COAL MINES AND SURFACE WORK AREAS OF UNDERGROUND COAL MINES","Subpart C—Surface Installations"],"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":"dfe463f3ba1d971d65da75c2ac08953468a70683430f4b678bb5dcb94643e3d4","source_id":"us-cfr","stale":true,"prev":"us/30-cfr-77.200","next":"us/30-cfr-77.201-1"},"notice":"GroundRules: Original legal text. Not legal advice."}