Carbon monoxide -- 575 µg/m3, 8-hour average
Nitrogen dioxide -- 14 µg/m3, annual average
PM2.5 -- 0 µg/m3, 24-hour average*
PM10 -- 10 µg/m3, 24-hour average
Sulfur dioxide -- 13 µg/m3, 24-hour average
Ozone**
Lead -- 0.1 µg/m3, 3-month average
Fluorides -- 0.25 µg/m3, 24-hour average
Total reduced sulfur -- 10 µg/m3, 1-hour average
Hydrogen sulfide -- 0.2 µg/m3, 1-hour average
Reduced sulfur compounds -- 10 µg/m3, 1-hour average; or
*No exemption is available with regard to PM2.5.
**No de minimis air quality level is provided for ozone. However, any net increase of 100 tons per year or more of volatile organic compounds or NOX subject to this article would be required to perform an ambient impact analysis including the gathering of ambient air quality data.
9 Va. Admin. Code § 5-80-1695
Statutory Authority: § 10.1-1308 of the Code of Virginia.