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r-7; F—f ' r-1 r-7 F—"nl r' r"-1 r-" �"-"� F7" r-" r-1, r—",, F-1, r, !l'. <br /> C- 11 <br /> RBCA SITE ASSESSMENT <br /> Cumulative Risk Worksheet <br /> Site Name:McDowell and Davis Towing,1360 Escalo Completed By:Rotoert Fourt,CEG 1 CHG �( <br /> Site Location:Escalon,San Joaquin County,CA Date Completed:5/12/2002 3 OF 3 Lam' <br /> Cumulative Target Risk: 1.0E-4 Target Hazard Index: 1.0E+0 <br /> CUMULATIVE RISK WORKSHEET <br /> Groundwater DAF Option: Domenico-First Order <br /> OFF-SITE RECEPTORS <br /> UutdoorAir: Groundwater: <br /> Residential Exposure Commercial Exposure <br /> Target Risk: Target HQ; Target Risk: Target HQ: <br /> CONSTITUENTS OF CONCERN 1.0E-61 1.0E-5 1.0E+0 1.0E-611.0E-5 1.0E+0 <br /> Carcinogenic Hazard Carcinogenic Hazard <br /> CAS No. Name Risk Quotient Risk Quotient <br /> 71-43-2 Benzene 6.5E-9 3,1E-4 3.6E-9 <br /> 100-41-4 Eth lbenzene 1-1 E-4 3.3E-5 <br /> 1634-04-4 Methyl t-Butyl Ether 6.2E-5 7.4E-3 <br /> 108-88-3 Toluene 6.4E-4 I 5.6E-9 <br /> 1330-20-7 X lens mixed isomers 1.2E-3 8.9E-5 <br /> Cumuladve Values:I 6.5E-9 2.3E-3 3.6E-9 7.6E-3 <br /> ■ indicates risk level exceeding target risk <br /> Software: GSI RBCA Spreadsheet Serial: G-491-EFX-872 <br /> ' ®Groundwater Services,Inc.(GSI),19951997. Version: 1.0.1 <br /> ill <br /> i <br /> 4 <br /> I <br />