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aData from EPA, Compilation of Air Pollutant Emission Factors, AP-42, Fifth ed., U.S. Environmental Protection Agency, U.S. Government Printing Office, Washington, D.C., January 1995. Tons are short tons. Factors were developed from emissions data from ten sites firing bituminous coal, eight sights firing subbituminous coal, and one site firing lignite. The emission factors are applicable to boilers using both wet limestone scrubbers or spray dryers and an electrostatic precipitator (ESP) or fabric filter (FF). In addition, the factors apply to boilers utilizing only an ESP or FF.

b Pollutants sampled for but not detected in any sampling run include: carbon tetrachloride, two sites; 1,3-dichloropropyene, two sites; N-nitrosodimethylamine, two sites; ethylidene dichlo-ride, two sites; hexachlorobutadiene, two sites; hexachloroethane, 1 site; propylene dichloride, 2 sites; 1,1,2,2-tetrachloro-ethane, two sites; 1,1,2-trichloroethane, two sites; vinyl chloride, two sites; and hexachlorobenzene, two sites. cEmission factor should be applied to coal feed, as fired.

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