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rr � rr = = Mob = mmmmm = 4rm <br /> RBCA SITE ASSESSMENT <br /> Tfer worksheet 9 2 <br /> Site Name Tabfe3-4 Completed By Denise Clendening <br /> Site Location 500 feet Date Completed 11111999 1 OF 1 <br /> Target Risk(Gass A 6 Bt t 0E-6 ❑ MCL exposure IrrnR? Calculation option 3 <br /> SUBSURFACE SOIL SSTL VALUES Target Risk(Class C) t 0E 5 ❑ PEL exposure lirnV Groundwater DAF Option Domenloo Flrat Ordor <br /> 15 FT BGS) Target Hazard Quotient 1 0E+0 OW"Irectional varL disperoion) <br /> SSTL Results For Complete Exposure Pathways tX a Complete) <br /> Representative <br /> Concordrallon Soil Volatilization to Soil Volatilization to Applkmble SSTL <br /> CONSTITUENTS OF CONCERN TSoi Leaching to Groundwater Indoor Air 1(i Outdoor Air sm Exceeded 7 RoqukW CRF <br /> Residential Commercial Regula a MCL) Residential Commercial Residential Commercial <br /> CAS No Namo 5001M on-aft 500 feet on-site on-site 500 feet m-ske "Tiff If yes Only If yes Ott <br /> 71-43-2 Benzene 6 6E-1 >Res NA NA NA NA 5 8E+1 4 7E+0 4 7E+0 ❑ <1 <br /> 67.86-3 Chloroform 0 0E+0 >Res NA NA NA NA 7 2E+1 5 8E+0 5 8E+0 ❑ <1 <br /> 1074)6-2 Dichloroethane 1,2- 0 OE+0 >Res NA NA NA NA 6 4E+1 51 E+0 51 E+0 ❑ <1 <br /> 100414 Ethylbenzene 91 E+0 >Res NA NA NA NA >Res >Res >Res ❑ 41 <br /> 1634-04-4 Meth t-t3 Ether 0 0E+0 >Res NA NA NA NA >Res 1 1 E+3 1 1 E+3 ❑ <1 <br /> 91-20-3 Naphthalene 00E+0 >Res NA NA NA NA NA NA >Res ❑ <1 <br /> 100.42-5 447ene 0 0E+0 >Res NA NA NA NA >Res >Res >Res ❑ <1 <br /> 127-184 Tetrachloroethene 0 0E+0 >Res NA NA NA NA >Res >Res >Res ❑ <1 <br /> 108-88-3 Toluene 2 5E+1 >Res NA NA NA NA >Res >Res >Res ❑ <1 <br /> 1330-20.7 X ene mixed Isomers 3 0E+1 >Res NA NA NA NA >Res >Res >Res 13 <1 <br /> >Res indicates risk based target concentration greater than constituent residual saturation value <br /> Software GSI RBCA Spreadsheet Senal G 3 3-ZOX 798 <br /> O Grocrridwater Semces Inc (GSI) 19951997 All Rights Reserved Verslon 10 1 <br />