{"data":{"id":"us-va/4vac25-40-3220","jurisdiction":"us-va","citation":"4VAC25-40-3220","heading":"Mine atmosphere test instruments","body":"Instruments shall be provided to test the mine atmosphere quantitatively for carbon monoxide, nitrogen dioxide, and other gases that occur in the mine.  Tests shall be conducted as frequently as necessary by the operator to ensure that the required quality of air is maintained.","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/section3220/","current_through":"2026 Regular Session (effective July 1, 2026)","vintage":"","retrieved_at":"2026-09-14T04:46:04Z","sha256":"cf5fd7ade68d2ff4d99d8bc51c7cb3468c342549673d87ffc10934703919a95f","source_id":"us-va-vac","stale":false,"prev":"us-va/4vac25-40-3210","next":"us-va/4vac25-40-3240"},"notice":"GroundRules: Original legal text. Not legal advice."}