June 01, 2013

Air Dispersion Modeling in the Major Source Construction Permitting Process

Robynn Andracsek and Robert Lambrechts

The goals of the Clean Air Act (CAA) include attaining and protecting air quality to satisfy all National Ambient Air Quality Standard (NAAQS) requirements. A principle means of achieving this is through placing preconstruction review and permitting requirements on certain new and modified sources of air pollution to require control technology and to protect against degradation of air quality. These requirements are implemented through the New Source Review Program. The program has three subparts, only two of which are pertinent to the topic covered by this article. The two relevant subparts apply to “major” sources of air pollution under the prevention of significant deterioration (PSD) program under Part C of Title I and the nonattainment area (NAA) program under CAA Section 173 and other provisions contained in Part D of Title I.

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