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F)v <br /> RBCA SITE ASSESSMENTTier 2 Wprksheet 8.2 <br /> Site Nall McDowell and Davis Towing, 136,Site Location:Escalon,San Joaquin County,CA Completed By:Robert Foul i CHG Date Com pleted, 11!1512003 2 OF 4 <br /> TIER 2 PATHWAY RISK CALCULATION <br /> ON <br /> CARCINOGENIC RISK TOXIC EFFECTS <br /> (2)Total Carcinogenic (3)Inhalation (4)Individual COC (5)Tolai Toxicant (6)Inhalation (7)Individual COC <br /> (1)EPA Intake Rate(mg/i Slope Factor Risk(2)x(3) Intake Rate(mg1i Reference Dose Hazard Quotient(5)/(6) <br /> Carcinogenic On-Site On-Site On-Site On-Site <br /> Constituents of Concem Classification Commercial (Mg/i Commercial Commercial Commercial <br /> Benzene A 2.5l 2.9l 7.4E-8 7111 1 1.7E-3 4.2E-3 <br /> Ethylbenzene D 3.4111 2.9&1 1.2E-3 <br /> Mi t-Bi Ether 2.21l 8.61 2,6E-4 <br /> Toluene D 6.0E-41 1.1E-1 5.21 <br /> Xylene mixed isomers D 1.3E-3 2 1 6.5E 4 <br /> Total Pathway Carcinogenic Risk= O.OE+O 7AE-8 Total Pathway Hazard Index L. 0-0E+0 f 1.2E-2 <br /> Software GSI RSCA Spreadsheet Serial: G-491-EFX-872 <br /> 0 Groundwater Services,Inc.(GSI),1995-1997.All Rights Reserved, Version: 1.0.1 <br />