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Tier 2 Worksheet 9.3 <br /> Site Name:Stockton Fire Station#3 Completed By:JEANNE HOMSEY <br /> Site Location:1116 First Street,Stockton,CA Date Completed:3/14/2000 1 OF I <br /> Target Risk(Class A&B) 1.0E-5 ❑ MCL exposure limit? Calculation Option: 2 <br /> GROUNDWATER SSTL VALUES Target Risk(Class C) 1.0E-5 ❑ PEL exposure limit? Groundwater DAF Option: Domenico-First Order <br /> Target Hazard Quotient 1.0E+0 (Ono-directional vert dispersion) <br /> SSTL Resutts For Complete Exposure Pathways('k"If Complete) <br /> Representative <br /> Concentration Groundwater Volatilization Groundwater Volatilization Applicable SSTL <br /> CONSTITUENTS OF CONCERN J( Groundwater Ingestion X to Indoor Air X to Outdoor Air SSTL Exceeded? Required CRF <br /> Residential: Commercial: Regulatory(MCL): Residential: A>SO, <br /> Residential Commercial: <br /> CAS No. Name (mg&) 100 feet (on-atte) (on-site <br /> (on-eros) (on-site) (on-axe) (on-site) (mg/L "■"If yes Only if'yes'left <br /> 71-43-2 Benzene 4.1 E-2 >Sol 2.9E-2 NA NA NA >Sol 2.9E-2 ■ 1.0E+00 <br /> 100-41-4 Eth (benzene 3.2E-3 >Sol 1.0E+1 NA NA NA >Sol 1.0E+1 ❑ <1 <br /> 1634-04-4 Meth t-e Ether 5.2E-2 >Sol 5.1E-1 NA NA NA >Sol 5.1 E-1 ❑ <1 <br /> 106-88-3 Toluene 1.5E-2 >Sol 2.0E+1 NA NA NA >Sol 2.0E+1 ❑ <1 <br /> 1330-20-7 X ens mixed isomers 6.4E-2 >Sol >Sol NA NA >Sol NA >Sol .>Sol ❑ <1 <br /> >Sol indicates risk-based target concentration greater than constituent solubility <br /> Software: GSI RBCA Spreadsheet Serial:G-313-VKX-542 <br /> O Groundwater Services,Inc.(GSI), 1995-1997.All Rights Reserved, Version: 1.0.1 <br />