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r t r r r r r t t r r r r r r t r r <br /> RBCA SITE ASSESSMENT <br /> Cumulative Risk Worksheet <br /> Site Name.McDowell and Davis Towing,1360 Escalo Completed By:Robert Fourt,CEG!CHG <br /> Site Location:Escalon,San Joaquin County,CA Date Completed:5/12/2002 2 OF 3 +� <br /> Cumulative Target Risk: 1.0E-4 Target Hazard Index: 1.0E+0 <br /> CUMULATIVE RISK WORKSHEET <br /> ON-SITE RECEPTORS <br /> outdoor r: indoor r: boll: <br /> Commercial Exposure Commercial Exposure Commercial Exposure Groundwater: <br /> Target Risk: Target HQ: Target Risk: Target HQ: Target Risk: Target HQ: <br /> CONSTITUENTS OF CONCERN 1.0E-611.OE-5 1.0E+0 1-0E-611.0E-5 1.0E+0 1.0E-611.0E-5 1.0E+0 <br /> Carcinogenic Hazard Carcinogenic Hazard Carcinogenic Hazard Carcinogenic Hazard <br /> CAS No. Name Risk Quotient Risk Quotient Risk Quotient Risk Quotient <br /> 71-43-2 Benzene 4.7E-5 2.7E-4 8-3E-6 ■ 4.7E-1 3.0E-11 NA <br /> NA <br /> 100-41-4 Eth lbenzene 9.3E-5 1.7E-1 2.9E-8 NA NA <br /> 1634-04-4 Methyl t-Bu 1 Ether 5.3E-5 9.5E-2 5.8E-7 NA NA <br /> 108-88-3 Toluene 5.5E-4 9.8E-1 1.4E-8 NA NA <br /> 1330-20-7 X lene mixed isomers 1.0E-3 1.9E+0 ■ 1.4E-9 NA NA <br /> Cumulative Values: 4.7E-9 2.0E-3 8.3E-6 3.6E+0 ■ 3.0E-11 6.2E-7 0.0F-+0 0.0E+0 <br /> ■ indicates risk level exceeding target risk <br /> Software: GSI RBCA Spreadsheet $erlal: G-491-EFX-872 <br /> ©Groundwater Services,Inc.(GSI),1995-1997. All Rights Reserved. Version: 1.0.1 <br />