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R8CA SITE ASSESSMENT <br /> Cumulative Risk Worksheet <br /> Site Name:McDowell and Davis Towing,1360 Escalo Completed By:Robert Fourt,CEG 1 CHG <br /> Site location:Escalon,San Joaquin County,CA Date Completed:12/3/2002 2 OF 3 <br /> Cumulative Target Risk: 1.0E-4 Target Hazard Index: S.oE+0 <br /> CUMULATIVE RISK WORKSHEET <br /> ON-SITE RECEPTORS <br /> OutdoorAir: Indoor Ir: .5011: <br /> Commercial Exposure Commercial Exposure Commercial Exposure Groundwater: <br /> Target Risk: Target HQ: Target Ri arget HQ: Target Risk: Target HQ: <br /> CONSTITUENTS OF CONCERN 1.0E 61 1.0E-5 1.0E+0 1.0E 0E+0 1.OE-61 1.0E-5 1.0E+0 <br /> Carcinogenic Hazard Ca ogenic-kE- <br /> Carcinogenic Hazard Carcinogenic Hazard <br /> CAS No. Name Risk Quotient Risk Risk Quotient Risk Quotient <br /> 71-43-2 Benzene 2.7E-9 1.5E-4 7-1 E 6 ■ 3.0E-11 NA NA <br /> 100-41-4 Eth (benzene 4.3E-5 2.9E-8 NA NA <br /> 1634-04-4 Meth t-Butyl Ether 1.1 E-5 2.5E-2 5.8E-7 NA NA <br /> 108-88-3 IToluene I 1.9E-4 1 5.1 E-1 1.4E-8 NA NA <br /> 9330-20-7 X iene mixed isomers 2.4E-5 6.3E-2 1.4E-9 NA NA <br /> Cumulative Values: 2,7E-9 4.2E-4 7.1 E-6 1.1E+0 3.0E-11 6.2E-7 0.0E+0 0.0E+0 <br /> ■ indkales risk level ezcaeding target risk <br /> Software: GSI RBCA Spreadsheet Serial: G-491-EFX-872 <br /> m Groundwater Services,Inc.(GSI),1995-1997, All Rights Reserved. Version: 1.0.1 <br /> C <br /> i <br /> I <br /> 7 <br /> f! <br />