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Jose Garcia -2- J June 11, 2009 <br /> Claim No. 8790 <br /> B. Monitoring Well Information <br /> Well Designation Date Installed Screen Interval Most Recent DTW <br /> feet b s Jan 07 <br /> MW-1 Aug88 ? 45.17 <br /> MW-2 Jun 91 ? 45.76 <br /> MW-3 Jun 91 7 44.88 <br /> MW-4 Nov 03 ? 44.96 <br /> MW-5 Nov 03 ? 45.31 <br /> MW-6 Nov 03 ? 44.58 <br /> • MTBE THREAT CLASSIFICATION: N <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 Industrial2 Maximum Latest (ug/L) <br /> Soil Dermal (Mar 08) <br /> Residential <br /> (mg/kg) (mg/kg) <br /> TPH-q NA NA 83 450 FP 2,200 5 <br /> TPH-d NA NA 83 450 FP NA 56 <br /> Benzene NA NA 0.044 0.27 FP 28 0.15 <br /> Toluene NA NA 2.9 210 FP 52 40 <br /> Eth (benzene NA NA 2.3 5.0 FP 23 29 <br /> Xylenes NA NA 2.3 100 FP 150 17 <br /> MTBE NA NA 0.023 65 FP 1.1 5 <br /> TBA NA NA 0.075 320,000 FP <5 12 <br /> 1,2-DCA NA NA 0.0045 0.48 FP 3.1 0.5 <br /> Lead NA NA 200 750 NA NA 15 <br /> PCE NA NA 0.37 0.95 NA NA0.06 <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: free product has been identified in MW-1 up to 0.52 feet (Jun 91), <br /> free product has been identified in MW-2 up to 0.62 feet (Jun 91), and free product has <br /> been identified in MW-3 up to 0.68 feet (Jun 91). <br /> VI. SOIL AND GROUNDWATER REMEDIATION <br /> A. Soil Excavation: unknown volume excavated in Apr 00. <br /> California Environmental Protection Agency <br /> C.,Recycled Paper <br />