{"data":{"id":"us-va/4vac25-40-5170","jurisdiction":"us-va","citation":"4VAC25-40-5170","heading":"Failure of ventilation","body":"When there has been a failure of mine ventilation other than a failure of a main fan as described in 4VAC25-40-5160, the operator shall:\n\n1. Withdraw all persons from the unventilated active areas; and\n\n2. De-energize the power in unvented active areas. The power shall not be restored or persons permitted to reenter the affected active areas until a certified foreman has determined that the flammable gas concentration in such active areas is less than 1.0%.","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/section5170/","current_through":"2026 Regular Session (effective July 1, 2026)","vintage":"","retrieved_at":"2026-09-14T04:46:10Z","sha256":"18a663d727b3df8d1aa7d15f512a2d451cb084b9d302508f2a50e6f0166c67ae","source_id":"us-va-vac","stale":false,"prev":"us-va/4vac25-40-5160","next":"us-va/4vac25-40-5180"},"notice":"GroundRules: Original legal text. Not legal advice."}