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Knowles Family Trust -2- ' March 5, 2009 <br /> Claim No. 854 <br /> B. Monitoring Well Information <br /> Well Designation Date Installed Screen Interval Most Recent DTW <br /> (feet b s) Nov 08 <br /> MW-1 Sep 98 35-65 37.32 <br /> MW-2 Sep 98 35-65 33.39 <br /> MW-3 Sep 98 25-56 - <br /> MW-4 Jan 99 41-71 36.39 <br /> MW-5 Jan 99 41-71 - <br /> MW-9 Nov 03 34-54 36.28 <br /> MW-10D May 06 90-100 37.22 <br /> MW-11 ? ? 36.80 <br /> • MTBE THREAT CLASSIFICATION- X <br /> • LAND USE DESIGNATION: 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 Industrial 2 Maximum Latest (ug/L) <br /> Soil Dermal (Nov 08) <br /> Residential m /k (mg/kg) <br /> TPH-g NA NA 83 450 240,000 240,000 5 <br /> TPH-d NA NA 83 450 NA NA 56 <br /> Benzene NA NA 0.044 0.27 41,000 41,000 0.15 <br /> Toluene NA NA 2.9 210 18,000 18,000 42 <br /> Eth (benzene NA NA 2.3 5.0 1,500 1,500 29 <br /> Xylenes NA NA 2.3 100 18,000 18,000 17 <br /> MTBE NA NA 0.023 65 <200 <200 5 <br /> TBA NA NA 0.075 320,000 <2,000 <2,000 12 <br /> 1,2-DCA NA NA 0.0045 0.48 680 680 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- 900 cubic yards of contaminated soil was excavated and <br /> removed in Apr 00 <br /> California En vironmental Frotecdon Agency <br /> ZJ' Recyc%d Paper <br />