{"data":{"id":"us-va/4vac25-40-890","jurisdiction":"us-va","citation":"4VAC25-40-890","heading":"Air overpressure limits","body":"Air overpressure resulting from surface blasting shall not exceed 133 decibels, as measured with a 2Hz or lower flat response microphone, at any inhabited building not owned or leased by the operator.","path":["Title 4. Conservation And Natural Resources","Agency 25. Department of Energy","Chapter 40. Safety and Health Regulations for Mineral Mining","Part VI. Explosives—Surface and Underground"],"source_url":"https://law.lis.virginia.gov/admincode/title4/agency25/chapter40/section890/","current_through":"2026 Regular Session (effective July 1, 2026)","vintage":"","retrieved_at":"2026-09-14T04:45:55Z","sha256":"594dd52bc3df39da3389133099e319c96b233df24e107c04d8db40466fb8c893","source_id":"us-va-vac","stale":false,"prev":"us-va/4vac25-40-880","next":"us-va/4vac25-40-893"},"notice":"GroundRules: Original legal text. Not legal advice."}