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RBCA SITE ASSESSMENTCumulative 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:12/312002 3 OF 3 <br /> Cumulative Target Risk: 1.0E-4 Target Hazard Index: 1 AE+O <br /> CUMULATIVE RISK WORKSHEET <br /> Groundwater DAF Option: Domenico-First Order <br /> OFFSITE RECEPTORS <br /> OutdoorAir: roun wa er: <br /> Residential Exposure Commercial Exposure 011 <br /> Target Risk: Target HQ: Target Risk: Target HQ: <br /> CONSTITUENTS OF CONCERN 1.0E-6!1.0E-5 1.0E+0 1.0E-611,0E-5 1.0E+0 <br /> Caronogenic Hazard Carcinogenic Hazard <br /> CAS No. Name Risk quotient Risk Quotient <br /> 71-43-2 Benzene 4.5E-9 2.1 E-4 4.1 E-9 <br /> 100-41-4 EthEbenzene 6.0E-5 2.9E-5 <br /> 1634-04-4 Methyl t-Butyl Ether 1.5E-5 7.2E-3 <br /> 108-88-31Toluene 2.7E-4 1.1 E-9 <br /> 1330-20-7 X lene mixed isomers 3.3E-5 5.8E-6 <br /> Cumulative Values: 4.5E-9 5.9E-4 4.1E-9 7.3E-3 <br /> ■ indicates risk level exceeding target risk <br /> Software:GSI RBCA Spreadsheet Serial: G-491-EFX-872 <br /> O Groundwater Services,Inc.(GSI),1995-f 997. Version: 1.0.1 <br /> 0s <br /> i <br /> 4 <br /> I <br /> I <br />