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Table 1 (Continued) <br />Predicted Vapor Phase VOC Concentrations in Lower Vadose Zone Soil <br />Equivalent to Maximum Groundwater Concentrations at the PQL and MDL <br />Analytes(e) <br />Henry's <br />Constant <br />KH(b) <br />(Dimensionless) <br />Henry's <br />Constant <br />kH(b) <br />(atm.W/mol) <br />Regulated <br />Groundwater <br />Concentration <br />at PQUO <br />(µg/L) <br />Vapor <br />Concentration <br />Equivalent to <br />PQLU) <br />(µg/L) <br />Vapor <br />Concentration <br />Equivalent to <br />PQLO) <br />(ppbv) <br />Regulated <br />Groundwater <br />Concentration <br />at MDUO <br />(µg/l-) <br />Vapor <br />Concentration <br />Equivalent to <br />MDUN <br />(µg/L) <br />Vapor <br />Concentration <br />Equivalent to <br />MDUN <br />(ppbv) <br />1,2 -Dichlorobenzene <br />0.0764 <br />0.00188 <br />0.50 <br />0.0382 <br />6.356 <br />0.31 <br />0.0237 <br />3.943 <br />1.3 -Dichlorobenzene <br />0.12222(0 <br />0.00301 <br />0.50 <br />0.0611 <br />10.166 <br />0.34 <br />0.0416 <br />6.922 <br />1,4 -Dichlorobenzene <br />0.0642 <br />0.00158 <br />0.50 <br />0.0321 <br />5.341 <br />0.46 <br />0.0295 <br />4.908 <br />Dichlorodifluoromethane <br />121.8 <br />3.0(d) <br />0.50 <br />60.9 <br />12,300. <br />0.31 <br />37.758 <br />7,628, <br />1,1-Dichloroethane <br />0.2320 <br />0.00570 <br />0.50 <br />0.116 <br />28.642 <br />0.22 <br />0.0510 <br />12.593 <br />1,2-Dichloroethane <br />0.0447 <br />0.00110 <br />0.50 <br />0.0224 <br />5.531 <br />0.42 <br />0.0188 <br />4.642 <br />1,1-Dichloroethene <br />6.26 <br />0.154 <br />0.50 <br />3.13 <br />788. <br />0.24 <br />1.50 <br />379. <br />cis- 1,2-Dichloroethene <br />0.3050 <br />0.00750 <br />0.50 <br />0.1525 <br />38.413 <br />0.31 <br />0.0946 <br />23.829 <br />trans -1,2-Dichloroethene <br />0.268 <br />0.00660 <br />0.50 <br />0.134 <br />33.753 <br />0.26 <br />0.0697 <br />17.557 <br />1,2-Dichloropropane <br />0.0146 <br />0.00360 <br />0.50 <br />0.0073 <br />1.580 <br />0.32 <br />0.0047 <br />1.017 <br />1,3-Dichloropropane <br />N <br />N <br />0.50 <br />0.40 <br />2,2-Dichloropropane <br />A) <br />N <br />0.50 <br />0.38 <br />1,1-Dichloropropene <br />N <br />N <br />0.50 <br />0.38 <br />Ethylbenzene <br />0.321 <br />0.00790 <br />0.50 <br />0.1605 <br />36.982 <br />0.24 <br />0.0770 <br />17.742 <br />Hexachlorobutidiene <br />1.056 <br />0.026(4) <br />1.0 <br />1.056 <br />99.062 <br />0.50 <br />0.528 <br />49.531 <br />Isopropylbenzene <br />0.0528 <br />0.0013(4) <br />0.50 <br />0.0264 <br />5.366 <br />0.28 <br />0.0148 <br />3.008 <br />p-Isopropyltoluene <br />N <br />N <br />0.50 <br />0.40 <br />Methylene chloride <br />0.0129 <br />0.000318 <br />1.0 <br />0.0129 <br />3.715 <br />0.23 <br />0.0030 <br />0.865 <br />Methyl-tert-butyl ether <br />0.2395 <br />0.0059(e) <br />0.50 <br />0.1198 <br />33.229 <br />0.36 <br />0.0862 <br />23.909 <br />Naphthalene <br />0.0187 <br />0.00046(4) <br />1.0 <br />0.0187 <br />3.569 <br />0.93 <br />0.0174 <br />3.321 <br />n-Propylbenzene <br />0.2274 <br />0.0056(e) <br />0.50 1 <br />0.1137 1 <br />23.128 <br />0.37 <br />0.0841 1 <br />17.107 <br />Styrene <br />0.0927 <br />0.00228 <br />0.50 <br />0.0464 <br />10.876 <br />0.33 <br />0.0306 1 <br />7.183 <br />Prediced Vapor Equivs to GW PQL and MCL.doc Page 3 of 4 <br />