{"data":{"id":"us/30-cfr-57.8528","jurisdiction":"us","citation":"30 CFR 57.8528","heading":"Unventilated areas.","body":"Unventilated areas shall be sealed, or barricaded and posted against entry.","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 G—Ventilation"],"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":"baad327c84ec6f6a909d98233ba8ac1c683b5fff9db662f46959c2629851cff1","source_id":"us-cfr","stale":true,"prev":"us/30-cfr-57.8527","next":"us/30-cfr-57.8529"},"notice":"GroundRules: Original legal text. Not legal advice."}