POSSIBLE SOURCES FOR SOME TRACE-ELEMENTS FOUND IN AIRBORNE PARTICLES AND PRECIPITATION IN DORSET, ONTARIO

Two types of potential source contribution function analysis-Potential Source Contribution Function (PSCF) and Total Potential Source Contri bution Function (TPSCF) analysis-were employed to study the source-rec eptor relationships for several trace elements (vanadium, selenium, ar senic, manganese, and indium) found in precipitation and airborne part icles collected at Dorset, Ontario. This study identified areas in the United States and Canada as possible emission source areas that could contribute to the trace element concentrations observed at Dorset. Th e identified regions in the United States generally coincide well with the locations of known emission sources, whereas the possible source regions revealed in Canada could not be adequately explained because o f the absence of emission source information. The likely emission sour ces for these trace elements include oil- and coal-fired power plants, incinerators, motor vehicles, nonferrous metal smelters, iron and ste el mills, ferrous-Mn alloy plants, and Mn chemicals production.