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Walter Shockley -2- June 15, 2009 <br /> Claim No. 9384 <br /> B. Monitoring Well Information <br /> Well Designation Date Installed Screen Interval Most Recent DTW <br /> feet b s Jan 09 <br /> MW-1 Jun 96 14-34 26.07 <br /> MW-2 Jun 96 12-32 26.58 <br /> MW-3 Jun 96 13-33 26.43 <br /> MW-4 Jun 96 8-28 26.93 <br /> MW-5 Oct 02 10-30 - <br /> MW-6 ? ? 26.70 <br /> MW-7 ? ? 26.30 <br /> MW-8 ? ? 26.07 <br /> MW-9 ? ? 26.09 <br /> MW-10 ? ? 23.91 <br /> MW-11 ? ? 29.13 <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 Industriaiz Maximum Latest (ug/L) <br /> Soil permal (Jan 09) <br /> Residential (mg/kg) <br /> (mg/kg) <br /> TPH-g NA NA 83 450 270,000" NA 5 <br /> TPH-d NA NA 83 450 1;500,000 56,000 56 <br /> Benzene NA NA 0.044 0.27 10 ND 0.15 <br /> Toluene NA NA 2.9 210 2.7 ND 40 <br /> Eth (benzene NA NA 2.3 5.0 13 ND 29 <br /> Xylenes NA NA 2.3 100 54 ND 17 <br /> MTBE NA NA 0.023 65 12 ND 5 <br /> TBA 'NA NA 0.075 320,000 27 ND 12 <br /> 1,2-DCA NA NA 0.0045 0.48 ND ND 0.5 <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: free product, TPH-D, in MW-1 and MW-4 <br /> VI. SOIL AND GROUNDWATER REMEDIATION <br /> California Environmental Protection Agemcf, <br /> r$RPrvr1Pd Pvnrr <br />