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James Langston -2- February 25, 2010 <br /> Claim No. 367 <br /> B. Monitoring Well Information <br /> Well Designation Date Installed Screen Interval Most Recent DTW <br /> feet b s Nov 09 <br /> MW-1 Mar 99 ?-27 16.28 <br /> MW-2 Mar 99 ?-27 16.42 <br /> MW-3 Mar 99 ?-27 16.60 <br /> MW-4 Mar 99 ?-27 16.57 <br /> MW-5 Dec 00 ?-30 16.20 <br /> MW-6 Dec 00 ?-30 16.69 <br /> MW-7 Dec 00 ?-30 16.69 <br /> MW-8 Dec 00 ?-30 16.42 <br /> DPE-1 Jun 07 ?-25 1 16.72 <br /> DPE-2 Jun 07 9-25 15.55 <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 Water u /L - WQOs a 2 <br /> Maximum Latest Maximum atest (ug/L) ? <br /> Nov 09 <br /> TPH-g NA NA 32,000 42,000 5 <br /> TPH-d NA NA NA 56 <br /> Benzene NA NA 540 190 0.15 <br /> Toluene NA NA 480 24 42 <br /> Eth (benzene NA NA 2,000 1,200 29 <br /> Xylenes NA NA 11,000 5,750 17 <br /> MTBE NA NA 200 <1 5 <br /> TBA NA NA <25 <10 12 <br /> 1,2-DCA NA NA <0.5 7.1 0.4 <br /> Lead NA NA NA NA 15 <br /> PCE NA NA NA NA 0.06 <br /> TCE NA NA NA NA 0.8 <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: 3,000 tons of contaminated soil was excavated in Aug 95 <br /> California Environmental ProtecBon Agency <br /> A <br /> Qd Recyc%dPaper <br />