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New Source Review : NACAA Positions| Related Documents| Related Links

New Source Review (NSR) is a permitting process conducted prior to the construction of a major stationary emission source. Modifications to a major source that will result in a significant net increase in emissions also require NSR permitting. The NSR process assures that construction in those areas in attainment of the national ambient air quality standards (NAAQS) will not lead to a deterioration in air quality, under EPA’s prevention of significant deterioration (PSD) provisions. NSR also accounts for specific local or regional requirements for areas in non-attainment of the NAAQS. The PSD provisions require installation of “Best Available Control Technology” (BACT), while non-attainment area provisions require installation of more stringent “Lowest Achievable Emission Reduction” (LAER). PSD permitting also requires an ambient air quality analysis using computer models, as well as an evaluation of the impacts on soils, vegetation, visibility, and Class I areas. The NSR requirements are pollutant specific. The pollutants to be reviewed depend on the increase of emissions of each pollutant. The applicability criteria are relatively complex. Many policy memoranda and guidance documents have been issued on applicability and implementation of these rules.

NACAA Positions

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