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Balbir Grewal -2- <br /> March 17, 2009 <br /> Claim No. 13651 <br /> B. Monitorina Well Information <br /> Well Designation Date Installed Screen interval Most Recent DTW <br /> (feet b s (A2r 08 <br /> MW-1 Feb 00 50-70 54.08 <br /> MW-2 Feb 00 50-70 52.68 <br /> MW-3 Feb 00 50-70 52.90 <br /> MW-4 Feb 02 48-68 1 53.44 <br /> • MTBE THREAT CLASSIFICATION: D <br /> • LAND USE DESIGNATION: residential and commercial <br /> • ESTIMATED WATER QUALITY OBJECTIVES (WQO'S) FOR SITE: Per the <br /> Water Quality Control Plan (Basin Plan) for the Sacramento River Basin and the <br /> San Joaquin River Basin (Fourth Edition). <br /> IV. MAXIMUM DOCUMENTED CONTAMINANT CONCENTRATIONS <br /> Contaminant Soil m /k ESLs Water (ug/L WQOs <br /> Maximum Latest Shallow Industria Maximum Latest (ug/L) <br /> Soil (Nov 08) <br /> Dermal <br /> Residential(mg/kg) (mg/kg) <br /> TPH-g NA NA 83 450 490 <50 5 <br /> TPH-d NA NA 83 450 430 <50 56 <br /> Benzene NA NA 0.044 0.27 6.2 <0.5 0.15 <br /> Toluene NA NA 2,9 210 1.3 <0.5 42 <br /> Eth (benzene NA NA 2.3 5.0 55 <0.5 29 <br /> X lenes NA NA 2.3 100 8.3 <0.6 17 <br /> MTBE NA NA 0.023 65 22 12 5 <br /> TBA NA NA 0.075 320,000 55 <10 12 <br /> 1,2-DCA NA NA 0.0045 0.48 60 22 0.4 <br /> Lead NA NA 200 750 NA NA 15 <br /> PCE NA NA 0.37 0.95 NA NA 0.06 <br /> TCE NA NA 0.46 4.1 NA NA 0.8 <br /> 1 Environmental Screening Levels(ESLs)Shallow Soil<3m,Groundwater is source of Drinking Water. <br /> 2 ESLs,Shallow Soil Screening Levels,Groundwater not source of Drinking Water,Commercial Use, Direct Exposure, <br /> Worker <br /> NA Not Analyzed, Not Applicable,or Data Not Available <br /> WOO Water Quality Objectives <br /> FP Free phase product in site wells <br /> V. FREE PRODUCT: none identified <br /> VI. SOIL AND GROUNDWATER REMEDIATION <br /> A. Soil Excavation: unknown volume <br /> B. In-Situ Soil Remediation: none identified <br /> California Environmental Protection Agency <br /> Z a Recycled Paper <br />