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t <br /> 14BCA SITE ASSESSMENT <br /> Tier 2 Worksheet 9 2 <br /> Site Name Formear Regal 603 Completed By George Converse <br /> Site Location 6425 Pacific Aenue Sl xkton CA Date Completed 10/1511998 1 OF 1 <br /> Target Risk(Class A&0)1 OE-6 0 MCL exposure kmd) Calculation Option 2 <br /> SUBSURFACE SOIL SSTL VALUES Target Risk(Class C) 1 OE 5 ❑ PEL exposure limit? Groundwater DAF Option Elec Acceptor Super <br /> I[> 3 3 FT BGS Target Hazard Quotient t OE+O (Onedireclional vert dispersion) <br /> SSTL Results Far Complete Exposure Pathways("x"If Complete) <br /> Representative SSTL <br /> j Concentration Soil Volatilization to Soil Volatilization to Applicable Exceeded <br /> CONSTITUENTS OF CONCERN X Sall Leaching to Groundwater 1 1 Indoor Air X Outdoor Air -_ SSTL_ _ Required CRF <br /> Residential Commercial Regulatory(MCL) Residential Commercial Residential Commerriat <br /> CAS No Name (mg1k ) 3000 feet (on site) (on sAe) (on site) (on site) 500 feet (on site) (mg/kg) "■"If yes Only if" es left <br /> 71-43-2 Benzene 5 OE-3 4 9E-1 1 1 E-2 NA NA NA 2 9E+1 5 3E+0 1 1 E-2 ❑ <1 <br /> 100-41-4 Eth (benzene 1 8E-1 1 6E+2 2 4E+1 NA NA NA >Res >Res 2 4E+1 ❑ 1 <1 <br /> 110-54-3 Hexane n- 8 7E+1 >Res >Res NA NA NA >Res >Res >Res ❑ <1 <br /> 1 1634-04-4 Methyl t-Siutyl Ether 5 OE-2 2 1 E+0 2 2E-1 NA I NA I NA >Res >Res 2 2E-1 ❑ <i <br /> 108-88-3 Toluene 5 OE-3 3 4E+2 6 6E+1 NA NA NA >Res >Res 6 6E+1 ❑ <1 <br />' 1330-20-7 X lene mixed Isomers 1 7E+0 >Res >Res NA NA NA >Res >Res >Res CI <1 <br /> >Res indicates risk based target concentration greater than constituent residual saturation value <br /> t Software GSI RBCA Spreadsheet Serial G-443 CSX-444 <br /> i <br /> Q Groundwater Services Inc (GSI) 1995-1997 All Rights Reserved Version 10 1 <br /> I� <br /> i <br /> I <br /> 1 <br /> it <br /> I <br /> i <br /> I <br />