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• Henry's law constant. <br /> Spreadsheets showing the Jury model calculations and the results of Jury <br /> Modeling, are contained in Appendix A. <br /> Table 4-1 shows the expected VOC concentrations in influent soil vapor to <br /> the Treatment System. These VOC concentrations were used as the <br /> chemical basis for the design of the soil vapor treatment components of <br /> the Treatment System. <br /> TABLE 4-1 <br /> Extracted Vapor Concentrations and Estimated Influent Vapor Concentrations <br /> to the Treatment System <br /> Chemical Constituent Contribution of Contribution of Treatment System <br /> Chemical Constituent Chemical Constituent Estimated Influent Vapor <br /> from Soil Vapor from Ground Water Concentration <br /> (Ppmv) my my <br /> cis 1,2-Dichloroethene 1.2 4.7 5.9 <br /> 1,1-Dichloroethane 8.4 2.3 10.7 <br /> Vinyl Chloride 91.8 5.5 97.3 <br /> Benzene 0.2 0.1 0.3 <br /> Total HVOCs 111.1 13.6 124.7 <br /> Total AVOCs 9.8 0.8 10.6 <br /> ppmv-parts per million by volume <br /> Technical Design Basis for Floating Product Removal <br /> Floating diesel product has been identified in site monitoring wells TW-2, <br /> TW-3, PZ-9, and MW-6A, which are located within the area of high <br /> chemical impacts. Floating product represents a source of impacts to <br /> A-zone ground water quality. During operation of the remedial action at <br /> the site, floating product will be extracted simultaneously with ground <br /> water and soil vapor. <br /> At present, measured floating product thickness at these four wells (ERM, <br /> October 9, 1997, Third Quarter Monitoring Report) ranges from 0.01 feet <br /> to 0.08 feet. Studies indicate that, typically, floating product thickness in <br /> 4-4 <br />