Virginia Administrative Code
Title 9 - ENVIRONMENT
Agency 5 - STATE AIR POLLUTION CONTROL BOARD
Chapter 60 - HAZARDOUS AIR POLLUTANT SOURCES
Part II - Emission Standards
Article 4 - Emission Standards for Toxic Pollutants from Existing Sources (Rule 6-4)
Section 9VAC5-60-220 - Standard for toxic pollutants

1. Regardless of any provision of any other regulation of the board, no owner or other person shall cause or permit to be discharged into the atmosphere from any affected facility any emissions of toxic pollutants in such quantities as to cause, or contribute to, any significant ambient air concentration that may cause, or contribute to, the endangerment of human health.

2. The owner of an affected facility shall employ control strategies as may be directed by the board for the control of toxic pollutants. The board may consider the potency and toxicity of each regulated toxic pollutant as well as the technical and economic feasibility of any available control strategies. Possible control strategies may include but are not limited to emission control equipment, process changes, substitution of less toxic or nontoxic materials, or operation and maintenance procedures which lower or eliminate emissions of toxic pollutants.