9VAC5-80-1645
9VAC5-80-1645. Ambient air ceilings
Cite as 9 Va. Admin. Code § 5-80-1645
No concentration of a pollutant shall exceed:
1. The concentration permitted under the secondary ambient air quality standard, or
2. The concentration permitted under the primary ambient air quality standard, whichever concentration is lowest for the pollutant for a period of exposure.