Virginia Administrative Code
Title 9 - ENVIRONMENT
Agency 5 - STATE AIR POLLUTION CONTROL BOARD
Chapter 80 - PERMITS FOR STATIONARY SOURCES
Part II - Emission Standards
Article 8 - Permits for Major Stationary Sources and Major Modifications Locating in Prevention of Significant Deterioration Areas
Section 9VAC5-80-1635 - Ambient air increments
Universal Citation: 9 VA Admin Code 9VAC5-80-1635
Current through Register Vol. 41, No. 3, September 23, 2024
In areas designated as class I, II or III, increases in pollutant concentration over the baseline concentration shall be limited to the following:
| MAXIMUM ALLOWABLE INCREASE (micrograms per cubic meter) | |
| Class I Area | |
| PM2.5: | |
| Annual arithmetic mean | 1 |
| 24 hour maximum | 2 |
| PM10: | |
| Annual arithmetic mean | 4 |
| 24 hour maximum | 8 |
| Sulfur dioxide: | |
| Annual arithmetic mean | 2 |
| 24-hour maximum | 5 |
| Three-hour maximum | 25 |
| Nitrogen dioxide: | |
| Annual arithmetic mean | 2.5 |
| Class II Area | |
| PM2.5: | |
| Annual arithmetic mean | 4 |
| 24 hour maximum | 9 |
| PM10: | |
| Annual arithmetic mean | 17 |
| 24 hour maximum | 30 |
| Sulfur dioxide: | |
| Annual arithmetic mean | 20 |
| 24-hour maximum | 91 |
| Three-hour maximum | 512 |
| Nitrogen dioxide: | |
| Annual arithmetic mean | 25 |
| Class III Area | |
| PM2.5: | |
| Annual arithmetic mean | 8 |
| 24 hour maximum | 18 |
| PM10: | |
| Annual arithmetic mean | 34 |
| 24 hour maximum | 60 |
| Sulfur dioxide: | |
| Annual arithmetic mean | 40 |
| 24-hour maximum | 182 |
| Three-hour maximum | 700 |
| Nitrogen dioxide: | |
| Annual arithmetic mean | 50 |
For any period other than an annual period, the applicable maximum allowable increase may be exceeded during one such period per year at any one location.
Statutory Authority
§ 10.1-1308 of the Code of Virginia; Clean Air Act (§§ 110, 112, 165, 173, and 182 and Title V); 40 CFR Parts 51, 61, 63, 70 and 72.
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