Western Maryland Power Plant Siting Study: Air Quality Assessment of Three Candidate Sites

摘要

This report presents the detailed analyses of air quality impacts related to three candidate sites under consideration in the Western Maryland Power Plant Siting Study. Both EPA-approved and state-of-the-art dispersion models were used to evaluate ground level concentrations against NAAQS and PSD Class II limits for both flat and elevated terrain areas. Candidate areas are described and stack and fugitive emissions and plant operating parameters are provided. Local meteorological data are used to predict ground level concentrations for primary stack pollutants, fugitive dust and fluoride levels. Visibility degradation and cooling tower moisture effects are also evaluated. PSD Class II limits for SO2 could be met at all candidate sites based on state-of-the-art modeling. EPA-approved models indicate that both Washington County options could realize greater potential emissions than the Frederick County option. No difference is anticipated in visible cooling tower plume frequency, salt deposition, or enhanced icing.