Dispersion Modeling

Air Quality Services offers comprehensive PSD modeling using the EPA approved AERMOD and CALPUFF modeling systems. CALPUFF is required for determining reasonable impacts of long-range transport and dispersion from PSD sources on Class 1 areas, as well as applications involving complex wind regimes. AERMOD is required for impacts within a 50 kilometer radius of the PSD source. We have successfully completed modeling projects associated with new coal-fired power plants and combustion turbine permits, as well as permit revisions resulting in the removal of imposed operational limitations.