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RBCA SITE ASSESSMENTTier 2 Worksheet 8.2 <br /> Sfte Name:Stockton Fire Station#3 Site Location:1116 First Street,Stockton,CA Completed By:JEANNE HOMSEY Date Completed:3/14/2000 4 OF 4 <br /> TIER 2 PATHWAY RISK CALCULATION <br /> R <br /> CARCINOGENIC RISK TOXIC EFFECTS <br /> (2)Total Carcinogenic (3)Oral (4)Individual COC (5)Total Toxicant (6)Oral (7)Individual COC <br /> (1)EPA Intake Rate(mg/kg/day) Slope Factor Risk(2)x(3) Intake Rate(mg/kg/day) Reference Dose Hazard Quotient(5)/(6) <br /> Carcinogenic on-Site Off-Site On-Site Off-Site On-Site Off-Site On-Sita Off-Site <br /> Constituents of Concern Classification Commercial Residential_ (mg"y)--1 Commercial Residential Commercial Residential (mg/kg-day) Commercial Residential <br /> Benzene <br /> Benzene A IAE-4 3.3E-19 1.0E-1 IAE-5 3.3E-20 <br /> Ethylbenzene D 3.2E-5 2.BE-20 1.0E-1 3.2_E4 2.8E-19 <br /> Meth yi t-Butyi Ether 5.1 E4 7.8E-19 5.0E-3 1.0E-1 1.6E-16 <br /> Toluene D 1AE4 3.3E-22 2.0E-1 7.2E4 1.6E-21 <br /> Xylene(mixed isomers) D 6.3E-4 6.1E-19 I OF+n 3JE4 3.0E-19 <br /> Total Pathway Carcinogenic Risk= 1 1.45-6 Total Pathway Hazard Index= 1.0E-1 1.6E-16 <br /> Software: GSI RBCA Spreadsheet Serial: G-313-VKX-542 <br /> C Groundwater Services,Inc.(GSI),1995-1997.All Rights Reserved, Version: 1.0.1 <br />