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<br />3 PROGRAM DESCRIPTION <br /> <br />Ambient TSP concentrations were samcled by a General Metal Works <br />high volume particulate sampler. The sampler's inlet was approximately <br />4.5 feet above ground level. The ambient ai r flow to the sampler was <br />unrestricted 360 degrees around the sampler inlet. The TSP sampler has <br />been certified by the U.S. EPA as a Reference Method for the determination <br />of suspended particulates in the atmosphere (40 CFR, Part 50.11, Appendix <br />BL <br /> <br />The sampler was calibrated in accordance with 40 CFR, Part 50.11, <br />Appendix B, before deploying it in the field. The calibration consisted <br />of comparing the air flow recorded by the sampler to the flow rate of an <br />orifice calibration unit. The orifice calibration unit was itself <br />calibrated against a Rootsmeter, which is a positive displacement primary <br />standard. The results of the calibration are given in Exhibit A. The <br />results also showed that the correlation between the two flows was .9999. <br /> <br />The glass fiber filters were prepared, handled and analyzed using a <br />stringent quality assurance quality control (QA/QC) protocol. The QA/QC <br />procedures are outlined in a Standard Operating Procedure Manual prepared <br />by Interpoll Laboratories (Interpoll labs Manual Number 4-1085, 1984). <br />The total suspended particulate concentration was obtained by measuring <br />the mass of particulate collected on a glass fiber filter (gravimetric <br />analysis) and dividing by the volume of air sampled. The results are <br />reported in micrograms per cubic meter of air sampled (µg/m3). <br /> <br />4 <br />