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RBCA SITE ASSESSMENT <br /> Trer 2 Worksheet 9 2 <br /> Site Name Time Oil Company Property 04-049 Completed By SECOR <br /> Site Location 14000 E Hrqhway 88 Lockeford CA pate Completed 7/301193$ 1 OF 9 <br /> Target Risk(Class A&B) 1 OE 6 o MCL exposure limit? Calculation Option 2 <br /> SUBSURFACE SOIL SSTL VALUES Target Risk(Class C) 1 OE 5 o PEL exposure limit <br /> (> 5 FT BGS) Target Hazard quotient 1 OE+D <br /> SSTL Results For Complete Exposure Pathways("x R Complete) <br /> Representative <br /> Concentration Soil Volatilization to Soil Volatl ITation to Applicable SSTL <br /> CONSTITUENTS OF CONCERN Sod Leaohin to Groundwater X Indoor Air X Outdoor Air SSTL Exceeded? Required CRF <br /> l Residential Commercial Regulatory(MCL) Residential Commercial Residential Commercial <br /> CAS No Name (mg/kg} (onsite) (on-slte) (ori-site) (off site) (on-site) (oft site) (on-sibs) (mg/kg) V If yes Only if yes left <br /> 71-43-2 Benzene-CA 0 0E+0 NA NA NA 6 6E-2 NA 2 6E+1 NA 6 6E-2 0 <1 <br /> 100-41-4 Eth benzene 0 DE+O NA NA NA >Res NA >Res NA >Res a <1 <br /> 108-88-3 Toluene 0 0E+0 NA NA NA 3 2E+2 NA >Res NA 3 2E+2 0 <1 <br /> 133420-7 Xylene(mixed isomers) 0 DE+O NA I NA NA >Res I NA >Res NA >Res o <1 <br /> >Res indicates risk based target concentration greater than constituent residual saturation value <br /> Software GSI RSCA Spreadsheet Serial G 147 MVX'52 <br /> C Groundwater Services knc (GSI) 1995-1997 All Rights Reserved Version 1 0 1 <br /> I <br /> 1 <br />