Author(s)

L.R. Johnson, B.L. Davis & D.J. Anderson

Abstract

A comparison of high volume (TSP) and PMio composition and PMio source apportionment capabilities L.R. Johnson, B.L. Davis, D.J. Anderson Institute of Atmospheric Sciences, South Dakota School of Mines and Technology, 501 East St. Joseph Street, Rapid City, South Dakota 57701-3995, USA INTRODUCTION The Rapid City and surrounding area within Pennington County, South Dakota, has a history of air pollution problems, specifically fugitive dust. From 1980 to 1988, TSP air monitors recorded 19 violations of the 24-hour standard of 260 //gm-3. Since the change to the PMio standard in 1987, there have been two exceedances of the PMio 24-hour standard of 150 //grrr3, both occurring in 1991. The South Dakota Department of Environment and Natural Resources informed EPA and the Pennington County Air Quality Board of an exceedance of the annual mean of 50 //grn'3 in 1990. Air monitor filters collected from January 1987 through September 1989 represent collocated P

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