{"data":{"id":"us-va/4vac25-40-3160","jurisdiction":"us-va","citation":"4VAC25-40-3160","heading":"Oxygen content in mines","body":"Air in all active areas shall contain at least 19.5% volume oxygen as measured by an acceptable oxygen analyzer.","path":["Title 4. Conservation And Natural Resources","Agency 25. Department of Energy","Chapter 40. Safety and Health Regulations for Mineral Mining","Part XV. Safety and Health Regulations—Underground Only","Article 3. Air Quality, Radiation and Physical Agents"],"source_url":"https://law.lis.virginia.gov/admincode/title4/agency25/chapter40/section3160/","current_through":"2026 Regular Session (effective July 1, 2026)","vintage":"","retrieved_at":"2026-09-14T04:46:03Z","sha256":"0d991bd0f27dcef0330d5bdaf4bc7f7f021bbdd43d6fccd0d6bd93e4c8672fa1","source_id":"us-va-vac","stale":false,"prev":"us-va/4vac25-40-3150","next":"us-va/4vac25-40-3170"},"notice":"GroundRules: Original legal text. Not legal advice."}