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0 <br /> SITE ASSESSMENT <br /> Tier 2 Worksheel8 2 <br /> Site Name Formeer Regal 603 Site Location 6425 Pacific Aenue Stockton CA Completed By George Converse Date Completed 10/15/1998 4 OF 4 <br /> TIER 2 PATHWAY RISK CALCULATION <br /> GROUNDWATER EXPOSURE PATHWAYS ■ (CHECKED IF PATHWAYS ARE ACTIVE) <br /> CARCINOGENIC RISK _ TOXIC EFFECTS <br /> (2)Total Carcinogenic (3)Oral (4)Individual COC (5)Total Toxicant <br /> (6)Oral (7)Individual COC <br /> (1)EPA Intake Rate(mg/kg/day) Slope Factor Risk(2)x(3) Intake Rale(mg/kg/day) Rererenoe Dose Hazard Quotient(5)1(6) <br /> Carcir"enic On Site OR Site On See ON Site On Site Off Site On Site OH Site <br /> 1 Constituents of Concem Classrficalion Commercial Residential (mpg day)'1 Commercial Residential Commercial Residential (mg/kg-day) Commercial Resrdenlial <br /> Benzene A 1 7E-5 5 9E-15 2 9E-2 5 IE-7 1 7E 16 <br /> Eth lhenzene D 2 2E 3 6 0E-13 1 OE-1 2 2E-2 &OE 12 <br /> Hexane n- F 6 9E-2 1 9E-11 6 OE-2 1 1 E+0 32E 10 <br /> Methyl t-Butyl Ether 1 1E-3 3 2E-13 5 OE-3 2 3E 1 6 4E 11 <br /> Toluene D 5 7E4 1 6E-13 2 OE-1 2 BE-3 7 9E 13 <br /> X lene mixed Isomers D 4 BE-3 1 3E-12 2 OE+O 2 4E 3 6 7E 13 <br /> t <br /> Tota!Pathway Carcinogenic Risk= 5 IE-7 1 7E-16 Tota!Pathway Hazard index= 1 4E+0 3 9E 10 <br />{ <br />= Software GSI RBCA Spreadsheet Serial G443 CSX-444 <br /> m Groundwater Services Inc (GSI) 1995 1997 All Rights Reserved Version 10 1 <br />( <br /> a <br /> d � <br /> i <br /> 3 <br />( <br /> t <br /> s <br /> t <br /> t ' <br /> i <br />