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COMPARISON OF THE 1985 NAPAP EMISSIONS INVENTORY WITH THE 1985 EPA TRENDS ESTIMATE FOR INDUSTRIAL SO2 SOURCES
Citation:
Zimmerman, D. AND R. Battye. COMPARISON OF THE 1985 NAPAP EMISSIONS INVENTORY WITH THE 1985 EPA TRENDS ESTIMATE FOR INDUSTRIAL SO2 SOURCES. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/R-94/012 (NTIS PB94-152220), 1994.
Impact/Purpose:
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Description:
The report gives results of analysis of 1985 industrial sulfur dioxide (SO2) emissions from two data sources: the National Acid Precipitation Assessment Program (NAPAP) inventory and the EPA TRENDS report. These analyses conclude that the two data sources estimate comparable emissions in the aggregate, but that estimates for specific categories and for processes within those categories vary widely. The TRENDS method, limited to source categories that emit 10,000 tonnes of SO2 per year, generally overestimates emissions from these source categories, due primarily to the absence of SO2 control efficiency assumptions. Overestimating emissions in the TRENDS data set is offset by including additional source categories in the NAPAP inventory, with the final aggregate estimates within <10% of each other. Due to these findings, the TRENDS methodologies are being revised for 1993 and thereafter, using the 1985 NAPAP inventory as a base. (NOTE: The 1990 Clean Air Act Amendments (CAAA) require that EPA report to Congress by 1995 a national inventory of annual SO2 emissions from industrial sources and emission projections for the next 20 years. This stems from the 5.6 million tons of industrial SO2 emissions cited in CAAA Title IV, and based on the estimated 1985 NAPAP emissions.)