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r r r r r r r r I r r r r r r r r r r <br /> ( f <br /> RBCA SITE ASSESSMENT <br /> Tier 2 Worksheet 8.2 <br /> Site Name:McDowell and Davis Towin 136 Site Location:Escalon San Joaquin County,CA Completed By:Robert Four(,CEG 1 CHG Date Com leted:5/12/2002 2 OF 4 <br /> TIER 2 PATHWAY RISK CALCULATION ` <br /> CARCINOGENIC RISK TOXIC EFFECTS <br /> (2)Total Carcinogenic (3)Inhalation (4)Individual COC (5)Total Toxicant (6)Inhalation (7)Individual COC <br /> (1)EPA Intake Rate(mgfkgrday) Slope Factor Risk(2)x(3) Intake Rate(mgf kgrday) Reference Dose Hazard quotient(5)1{6) <br /> Carcinogenic On-Site On-Site On-Site Onsite <br /> Constituents of Concem Classification Commercial m 1k- "-1 Commercial Commercial m -da Commercial <br /> Benzene A 2.9E-4 2.9E-2 8.3E-6 8.1E-4 1.7E-3 4.7E-1 <br /> Eth benzene D 4.8E-2 2.9E-1 1,7E-1 <br /> Methyl t-Butt Ether 8.1E-28.6E-1 9.5E-2 <br /> Toluene D 1,1E-1 1.1 E-1 9.8E-1 <br /> X gene mixed isomers D 3.7E+0 2.0E+0 1.9E+0 <br /> Tota!Pathway Carcinogenk Risk= 0.0E+0 8.3E 6 Tota!Pathway Hazard Index= 0.0E+0 3.6E+0 <br /> Software:GSI RBCA Spreadsheet Serial:G-491-EFX-872 <br /> V Groundwater Services,Inc.(GSI),1995-1997.All Rights Reserved. Version: 1.0.1 <br />