Administrative Code

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Virginia Administrative Code
Title 9. Environment
Agency 5. State Air Pollution Control Board
Chapter 20. General Provisions

9VAC5-20-205. Prevention of significant deterioration areas.

A. Prevention of significant deterioration areas are geographically defined below by locality for the following criteria pollutants:

1. Particulate matter.

All areas not designated nonattainment for particulate matter in 9VAC5-20-204.

2. Sulfur dioxide.

All areas not designated nonattainment for sulfur dioxide in 9VAC5-20-204.

3. Carbon monoxide.

All areas not designated nonattainment for carbon monoxide in 9VAC5-20-204.

4. Ozone (volatile organic compounds):

All areas not designated nonattainment for ozone in 9VAC5-20-204.

5. Nitrogen oxides.

All areas not designated nonattainment for nitrogen oxides in 9VAC5-20-204.

6. Lead.

All areas not designated nonattainment for lead in 9VAC5-20-204.

B. All areas of the state are geographically defined as prevention of significant deterioration areas for the following pollutants:


Sulfuric acid mist

Total reduced sulfur:

Hydrogen sulfide

Methyl mercaptan

Dimethyl sulfide

Dimethyl disulfide

Reduced sulfur compounds:

Hydrogen sulfide

Carbon disulfide

Carbonyl sulfide

Municipal waste combustor organics (measured as total tetra-chlorinated through octa-chlorinated dibenzo-p-dioxins and dibenzofurans)

Municipal waste combustor metals (measured as particulate matter)

Municipal waste combustor acid gases (measured as the sum of SO2 and HCl)

C. The classification of prevention of significant deterioration areas is as follows:

1. Class I.

a. Federal -- James River Face Wilderness Area (located in AQCR 2) and Shenandoah National Park (located in AQCR 2 and AQCR 4).

b. State -- None.

2. Class II -- All areas of the state not designated in Class I.

3. Class III -- None.

D. The area classification prescribed in subsection C of this section may be redesignated in accordance with 40 CFR 52.21(e), (g), (u) and (t).

Statutory Authority

§ 10.1-1308 of the Code of Virginia; §§ 110 and 182 of the Clean Air Act; 40 CFR Part 51.

Historical Notes

Derived from Virginia Register Volume 12, Issue 16, eff. June 1, 1996; amended, Virginia Register Volume 14, Issue 2, eff. January 1, 1998; Volume 14, Issue 11, eff. April 1, 1998; Volume 15, Issue 2, eff. January 1, 1999; Volume 20, Issue 23, eff. August 25, 2004; Errata, 20:26 VA.R. 3210-3211 September 6, 2004.

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