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Tier 2 Worksheet 8.2 <br /> Site Name:Formeer Regal 603 Site Location:6425 Pacific Aenue,Stockton,CA Completed B Roy Butler Date Completed:711011998 1 OF 4 <br /> TIER 2 PATHWAY RISK CALCULATION <br /> OUTDOOR AIR EXPOSURE PATHWAYS ■ CHECKED IF PATHWAYS ARE ACTIVE) <br /> CRRCINOGENIC 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(mg/kg/day) Slope Factor Risk(2)x(3) Intake Rate(mglkglday) Reference Dose Hazard Quotient(5)1(6) <br /> Carcinogenic On-Site Off-Site On-Site ON-Site On-Site Off-Site On-Site Off-Site <br /> Constituents of Concern Classification Commercial Residential m 1 -da "-i Commercial Residential Commercial Residential m -da Commercial Residential <br /> Benzene A 4.5E-8 6.0E-9 2.9E-2 1.3E-9 1.7E-10 1.3E-7 1.4E-8 1.7E-3 7.5E-5 8.2E-6 <br /> Eth (benzene D 3.1E-6 5.0E-7 2-9E-1 1.1E-5 1,8E-6 <br /> Hexane n 1.8E-3 2.4E-4 5.7E 2 3.2E-2 4.2E-3 <br /> Methyl t-But I Ether 4.4E-7 6.4E-8 8.6E-1 5.1E-7 7.5E-8 <br /> Toluene D 4.5E-7 9.9E-9 1.1E-1 4.0E-6 8.6E-8 <br /> Xylene mixed isomers b 4.7E-5 8.3E-6 2.0E+0 2.3E-5 4.2E-6 <br /> Tota!Pathway Carcinogenic Risk= 1.3E-9 1.7E-10 Tota!Pathway Hazard Index= 3.2E-2 4.3E-3 <br /> Software:GSI RBCA Spreadsheet Serial. G-443-CSX-444 <br /> ®Groundwater Services,Inc(GSI),1995-1997.All Rights Reserved. Version: 1.0.1 <br />