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Grant Family Trust -2- 1%001 May 18, 2009 <br /> Claim No. 8590 <br /> B. Monitoring Well Information <br /> Well Designation Date Installed Screen Interval Most Recent DTW <br /> feet b s Oct 08 <br /> MW-1 ? ? 7.87 <br /> MW-2 ? ? 9.32 <br /> MW-3 ? ? 9.01 <br /> MW-4 ? ? 7.65 <br /> MW-5 ? ? 8.90 <br /> MW-6 ? ? 8.87 <br /> MW-7 ? ? 8.67 <br /> MW-8 ? ? 8.92 <br /> • MTBE THREAT CLASSIFICATION: C <br /> • LAND USE DESIGNATION: commercial/ industrial <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 Industria12 Maximum Latest (ug/L) <br /> Soil Dermal (Jul 08) <br /> Residential (mg/kg) <br /> m /k <br /> TPH-g NA NA 83 450 4,900 <50 5 <br /> TPH-d NA NA 83 450 NA NA 56 <br /> Benzene NA NA 0.044 0.27 2,400 280 0.15 <br /> Toluene NA NA 2.9 210 390 6.3 42 <br /> Eth (benzene NA NA 2.3 5.0 190 11 29 <br /> Xylenes NA NA 2.3 100 430 73 17 <br /> MTBE NA NA 0.023 65 23 17 5 <br /> TBA NA NA 0.075 320,000 <200 <25 12 <br /> 1,2-DCA NA NA 0.0045 0.48 <40 0.6 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 /> WQO 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 /> California Environmental Protection Agency <br /> �.a Recycled Paper <br />