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Tier 7 Worksheet 9 <br /> Site Name Table3.3 Completed By Dense Clendening <br /> Site Location 1000 feet Date Completed 1/1/1999 1 0F1 <br /> Target Risk(Class A b 8) f OE-6 ❑ MCL exposure limlt7 Calculation Option 3 <br /> GROUNDWATER SSTL VALUES Target Risk(Class C)1 OE 5 ❑ PEL exposure dmd7 Groundwater 0AF option Domenico First Order <br /> Target Hazard Quotient 1 0E+0 (rwo-directionar vert dispersion) <br /> SSTL Results For Com leto Ex urs Path x"N Com lets <br /> Representative <br /> CONSTITUENTS OF CONCERN Coneonirallon Groundwater Volatilization Groundwater Valatilvatron Applicable SSTL <br /> TX Groundwater ingestion I to Indoor Air X I to Outdoor Air SSTL Exceeded 7 Required CRF <br /> Residential Commercial Regutatory(MCL) Residential Commercial Resklentlat Commercial <br /> CAS No Name m 1000Teet on-see oo <br /> toteet erFake or►sft [—eke) (an-011a) "®"It yes Only ft yes Left7143-2 Senzene 23E+0 >Sol NA NA NA NA NA 1 9E+1 1 9E+1 ❑ <1 <br /> 673 Chloroform 8 OE4 >Sol NA NA NA NA NA 3 0E+1 3 0E+1 ❑ <1 <br /> 1074)6-2 Dlchloroethane 1.2- 4 6E-1 >Sol NA NA NA NA NA 5 2E+1 5 2E+1 ❑ <1 <br /> 100-414 Ethvfbenzene 2&E-1 >Sol NA NA NA NA NA >Sol >Sol ❑ <1 <br /> 1634.04-4 Meth t-Butyl Ether 8 7E-3 >Sol NA NA NA NA NA 1 4E+4 1 4E+4 ❑ <1 <br /> 91-20-3 Naphthalene 2 OE-1 >Sol NA NA NA NA NA NA >Sol ❑ <1 <br /> 100-42-5 Styrene 9 OE-4 >Sol NA NA NA NA NA >Sol >Sol ❑ <1 <br /> 12'7-18-4 Tetrachloroethene 6 OE-4 >Sol NA NA NA NA NA >Sol >Sol 0 <1 <br /> 108-8&3 Toluene 2 OE+O >Sol NA NA NA NA NA >Sol >Sol ❑ <1 <br /> i 330-20-7 X ens mixed Isomers 9 8E-1 >Sol NA NA NA NA NA >Sol >Sol ❑ <1 <br /> >Sol Indicates risk based target concentration greater than constituent odutxidy <br /> Software GSI RBCA Spreadsheet Senal G 373•ZOX 798 <br /> 0 Groundwater Services Inc (GSI) 1995.1997 All Rights Reserved Version 10 1 <br />