{"data":{"id":"us-va/9vac5-50-80","jurisdiction":"us-va","citation":"9VAC5-50-80","heading":"Standard for visible emissions","body":"Unless specified otherwise in this part, on or after the date on which the performance test required to be conducted by 9VAC5-50-30 is completed, no owner or other person shall cause or permit to be discharged into the atmosphere from any affected facility any visible emissions which exhibit greater that 20% opacity, except for one six-minute period in any one hour of not more than 30% opacity. Failure to meet the requirements of this section because of the presence of water vapor shall not be a violation of this section.","path":["Title 9. Environment","Agency 5. State Air Pollution Control Board","Chapter 50. New and Modified Stationary Sources","Part II. Emission Standards","Article 1. Standards of Performance for Visible Emissions and Fugitive Dust/Emissions (Rule 5-1)"],"source_url":"https://law.lis.virginia.gov/admincode/title9/agency5/chapter50/section80/","current_through":"2026 Regular Session (effective July 1, 2026)","vintage":"","retrieved_at":"2026-09-14T04:48:28Z","sha256":"45f48a76431dbc0dc757234b69eed039d4b9586a4819f8bf2d1641c2240509a5","source_id":"us-va-vac","stale":false,"prev":"us-va/9vac5-50-70","next":"us-va/9vac5-50-90"},"notice":"GroundRules: Original legal text. Not legal advice."}