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Den's Auto Repair -2- "� March 24, 2009 <br /> Claim No. 10841 <br /> B. Monitoring Well Information <br /> Well Designation Date Installed Screen Interval Most Recent DTW <br /> feet b s (Aug08 <br /> MW-1a Se 97 60-65 23.94 <br /> MW-1b Sep 97 25-45 23.81 <br /> MW-2a Sep 97 60-65 24.36 <br /> MW-2b Sep 97 25-45 24.03 <br /> MW-3a Sep 97 60-65 25.19 <br /> MW-3b Sep 97 20-40 25.12 <br /> MW-4 Feb 06 110-120 24.54 <br /> MW-5 Feb 06 60-65 24.00 <br /> MW-6 Feb 06 60-65 24.77 <br /> MW-7 Feb 06 110-120 24.47 <br /> • MTBE THREAT CLASSIFICATION: C <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 Industria12 Maximum Latest (ug/L) <br /> Soil Dermal (Nov 08) <br /> Residential (mg/kg) <br /> m /k <br /> TPH-g NA NA 83 450 33,000 33,000 5 <br /> TPH-d NA NA 83 450 NA NA 56 <br /> Benzene NA NA 0.044 0.27 8,400 1,000 0.15 <br /> Toluene NA NA 2.9 210 200 28 42 <br /> Eth (benzene NA NA 2.3 5.0 1,000 85 29 <br /> Xylenes NA NA 2.3 100 1,500 88 17 <br /> MTBE NA NA 0.023 65 2,160 <0.5 5 <br /> TBA NA NA 0.075 320,000 650 <10 12 <br /> 1,2-DCA NA NA 0.0045 0.48 31 30 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 /> California En vironmental Protection Agency <br /> Zo'Re cycled Paper <br />