Virginia Administrative Code
Title 9 - ENVIRONMENT
Agency 5 - STATE AIR POLLUTION CONTROL BOARD
Chapter 40 - EXISTING STATIONARY SOURCES
Part II - Emission Standards
Article 1 - Visible Emissions and Fugitive Dust/Emissions (Rule 4-1)
Section 9VAC5-40-80 - Standard for visible emissions

Unless specified otherwise in this part, 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 than 20% opacity, except for one six-minute period in any one hour of not more than 60% opacity. Failure to meet the requirements of this section because of the presence of water vapor shall not be a violation of this section.

Statutory Authority

§§ 10.1-1307 and 10.1-1308 of the Code of Virginia.