Virginia Administrative Code
Title 9 - ENVIRONMENT
Agency 5 - STATE AIR POLLUTION CONTROL BOARD
Chapter 80 - PERMITS FOR STATIONARY SOURCES
Part II - Emission Standards
Article 5 - State Operating Permits
Section 9VAC5-80-870 - Application review and analysis

A. No permit shall be granted pursuant to this article unless compliance with the standards in 9VAC5-80-850 is demonstrated to the satisfaction of the department by a review and analysis of the application performed on a source-by-source basis as specified below:

B. If the department has reason to believe that a source may be in violation of an air quality standard, it may require an air quality impact model. All applications of air quality modeling involved in any air quality analysis required by this article shall be based on the applicable air quality models, data bases, and other requirements specified in Appendix W to 40 CFR Part 51.

C. Where an air quality impact model specified in Appendix W to 40 CFR Part 51 is inappropriate, the model may be modified or another model substituted. Such a modification or substitution of a model may be made on a case-by-case basis, or, where appropriate, on a generic basis for a specific state program. Written approval of the department must be obtained for any modification or substitution. In addition, use of a modified or substituted model shall be subject to notice and opportunity for public comment under 9VAC5-80-1020.