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Tier 1 Worksheet fi.3 <br /> Site Name:Country Club Completed By:Stephen Alton,R.E.A. <br /> Site Location:Stockton CA date Com feted:7/811998 1 OF 1 <br /> Target Risk(Class A B B) 1.0E-6 ■ MCL exposure limit? : Calculation Option. 1 <br /> GROUNDWATER RBSL VALUES Target Risk(Class CI 1.0E-5 ❑ PEL exposure limit? <br /> Target Hazard Quotient 1.0E+0 <br /> RBSL Results For Complete Exposure Pathways("x"if Complete) <br /> Representative RBSL <br /> Concentration Groundwater Volatilization Groundwater Volatilization Applicable Exceeded <br /> CONSTITUENTS OF CONCERN Groundwater Ingestion X to Indoor Air X to Outdoor Air RBSL 7 Required CRF <br /> Residential: Commercial: Regulatory(MCL): Residential: Commercial: Residential CommerciaC <br /> CAS No. Name (mglL) (on-site) lon-site) (on-site) (on-site) (on-site) (on-silo) (on-site) (mg1L "■"If yes Only if"yes"left <br /> 71-43-2 Benzene 6 7E+0 NA NA NA NA 5.4E-2 NA 4.9E+0 5.4E-2 ■ 1.2E+02 <br /> 100-41-4 Eth (benzene 1.4E+0 NA NA NA NA >Sol NA >Sol >Sol ❑ <1 <br /> 1634-04-4 Methyl t-But I Ether 8.9E-1 NA NA NA NA 6.5E+3 NA >Sol 6.5E+3 ❑ <1 <br /> 108-88-3 1 Toluene 1.3E+0 NA NA NA NA 2.1E+2 NA >Sol 2.1E+2 ❑ <1 <br /> 1330-20-7 X leve mixed isomers 5.0E+0 NA NA NA NA >Sol NA >Sol >Sol ❑ 1 <1 <br /> Software: GSI RBCA Spreadsheet Serial: g-337-yax-542 <br /> ®Groundwater Services,Inc.(GSI),1995.All Rights Reserved. Version: v 1.0 <br />