Abstract

The EPA's Industrial Source Complex (ISC) dispersion model was evaluated to determine its applicability to the gas industry. The ISC model uses meteorological data to estimate air quality impacts from multiple source industrial complexes. General features of the ISC model particularly applicable to the gas industry include: 1) Variation of source emission rate by hour and season; 2) Rural and urban mode dispersion parameters; 3) Use of on-site meteorological data or observations from nearby National Weather Service (NWS) surface stations; and 4) Calculation of the effects of adjacent or nearby buildings on dispersion from compressor engine exhaust. Both the ISC Short-Term Program and the Long-Term Program are described and analyzed in this report.

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