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AEROSOL SOURCE CHARACTERIZATION STUDY IN ST. LOUIS, TRACE ELEMENT ANALYSIS
Citation:
Hardy, K. AEROSOL SOURCE CHARACTERIZATION STUDY IN ST. LOUIS, TRACE ELEMENT ANALYSIS. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/7-80/025.
Description:
The aerosol in St. Louis was sampled in July 1975 to better characterize the aerosol in an urban environment with moderate dispersion characteristics and heavy industrial activity. Two sampling sites were chosen, one in downtown St. Louis and a second close to the industrialized section in south St. Louis. Aerosol source coefficients show that the aerosol from the downtown site is primarily from coal (60-80%), cement dust (17%), steel manufacturing (6-7%) and auto emissions (3%). The aerosol from the industrialized site is primarily due to coal combustion products and dust (75%), and cement dust (15%), while auto emissions and heavy industrial processes account for about 5% of the aerosol mass. Determining the directional distribution of the aerosol trace elements allowed pinpointing of strong local sources.