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RBCA SITE ASSESSMENT <br /> Tier 2 Worksheet 9 1 <br /> Site Name Forrneer Regal 603 Completed By George Converse <br /> Site Location 5425 Pacific Aenue Stockton CA Date Com feted 1 011 511 998 pF <br /> Target Risk(Class A S B) 1 OE-6 ❑ MCL exposure limit? Calculation Option 2 <br /> SURFACE SOIL SSTL VALUES Target Risk(Class C) 1 OE 5 ❑ PEL exposure limit? Groundwater DAF Option Elec Acceptor Super <br /> (<3 3 FT BGS) Target Hazard Ouotient S 0E+0 (One-directional vert dispersion) <br /> SSTL Results For Complete Exposure Pathways("x"if Complete) <br /> Representative SSTL <br /> Concentration Ingestion Inhalation Construction Applicable Exceeded <br /> CONSTITUENTS OF CONCEF'N X Sod Leaching to Groundwater and Dermal Contact I Worker SSTL ? Required CRF <br /> Residential Commercial Regulatory(MCL) Residential Commercial Commercial <br /> CAS No Name (mgfkg) 3000 feet (on-site) (on-site) (on-site) (on site) on-sde (mpg) "■"If yes Only rf'es left <br /> 71-43-2 Benzene 5 OE-3 4 9E-1 1 1 E-2 NA NA NA NA 1 1 E-2 ❑ <1 <br /> 100-41-4 Eth lberizen+: 5 OE-3 1 6E+2 2 4E+1 NA NA NA NA 2 4E+1 ❑ <1 <br />` 110-54-3 Hexane,n- 2 OE-1 >Res >Res NA NA NA NA >Res ❑ <1 <br /> I 1634-04-4 Methyl t-eu ,I Ether 5 OE-2 2 1 E+O 2 2E-1 NA NA NA NA 2 2E-1 ❑ <1 <br /> 108-88-3 Toluene 5 OE-3 3 4E+2 6 6E+1 NA NA NA NA 6 6E+1 ❑ <1 <br /> 1330-20-7 X leve mixed isomers 5 OE-3 >Res >Res NA NA NA NA >Res ❑ <4 <br /> 1 >Res Indicates risk based target concentration greater than constituent residual saturation value <br /> Software GSI RSCA Spreadsheet Serlal G-443-CSX-444 <br /> ©Groundwater Services Inc (GSI) 1995-1997 All Rights Reserved Version 10 1 <br /> k <br />