{"data":{"id":"us-va/4vac25-40-5330","jurisdiction":"us-va","citation":"4VAC25-40-5330","heading":"Use of air passing by opening of unsealed abandoned area to ventilate","body":"Air that has passed by an opening of any unsealed abandoned area and contains 0.25% or more of flammable gas shall not be used to ventilate working areas.  Examinations of such air shall be conducted during the preshift examinations required by 4VAC25-40-5510.","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 11. Gassy Mines"],"source_url":"https://law.lis.virginia.gov/admincode/title4/agency25/chapter40/section5330/","current_through":"2026 Regular Session (effective July 1, 2026)","vintage":"","retrieved_at":"2026-09-14T04:46:10Z","sha256":"7598ab373a192eff73879daf9ae3b01003a3b6ce3ecff4a053e16157a859dc95","source_id":"us-va-vac","stale":false,"prev":"us-va/4vac25-40-5320","next":"us-va/4vac25-40-5340"},"notice":"GroundRules: Original legal text. Not legal advice."}