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RBCA SITE ASSESSMENT <br /> Tler 2 Worksheet 9.2 <br /> Site Name:Formeer Regal 603 Completed By:Roy Butler <br /> S8e Location:6425 Pacific Aenue,Stockton,CA Date Completed:711011998 1 OF 1 <br /> Target Risk(Class A&8)1.0E-6 ❑ MCL exposure limit? Catcula4on Option, 2 <br /> SUBSURFACE SOIL SSTL VALUES Target Risk(Class C)1.0E-5 ❑ PEL exposure limit? Groundwater OAF Option Elec.Acceptor Super, <br /> >3.3 FT BGS Target Hazard Quotient 1.0E+0 (One-directional vers.dispersion) <br /> SSTL Results For Complete Exposure Pathways("x"it Complete) <br /> Representative SSTL <br /> Concentration Soil Volatilization to Soil Volatilization t0 Applicable Exceeded <br /> CONSTITUENTS OF CONCERN X Soil Leaching to Groundwater Indoor Air X I Outdoor Air SSTL ? Required CRF <br /> Residential: Commercial: Regulatory(MCL): Residential: Commercial: Residential: Commercial: <br /> CAS No. Name (mg/kg) 3000 feel (on-site) (on-site) (on-sile) (on-ails) 500 feet I (on-site) (mg/kg) "■"If es Onl if es"left <br /> 71-43-2 Benzene 5.0E-3 1,3E+0 1.1E-2 NA NA NA 2.9E+1 5.3E+0 1.1E-2 ❑ <1 <br /> 100-41-4 El h Ibenzene 1.8E-1 1.4E+2 2.4E+1 NA NA NA >Res >Res 2.4E+1 ❑ 0 <br /> 110-54-3 Hexane,n- 8.7E+1 >Res >Res NA NA NA >Res >Res >Res ❑ <1 <br /> [11-1�4-04-4 Meth I t-Bu l Ether 5.0E-2 2.0E+0 2.2E-1 NA NA NA >Res >Res 2.2E-1 ❑ <1 <br /> 108-88-3 Toluene 5.0E-3 3.6E+2 6.6E+1 NA NA NA >Res >Res 6.6E+1 11 <1 <br /> -20-7 Xylene mixed isomers 7.7E+0 I >Res >Res NA NA NA >Res >Res >Res ❑ <1 <br /> >Res indicates risk•based target concentration greater than constituent residual saturation value <br /> Software:GSI RSCA Spreadsheet Serial: G-443-CSX-444 <br /> O Groundwater Services,Inc,(GSI),1995-1997.All Rights Reserved. Version: 1.0.1 <br /> I <br /> i <br />