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Equilon Enterprises -2- `' February 28, 2011 <br /> Claim No. 4954 <br /> B. Monitoring Well Information <br /> Well Designation Date Installed Screen Interval Depth to Water <br /> (feet bgs) (feet bgs) <br /> Dec 2010 <br /> MW-1 Dec 89 ?-40 16.60 <br /> MW-2 Dec 89 ?-40 17.40 <br /> MW-3 Dec 89 ?-39 17.80 <br /> MW-4 Dec 89 ?-40 17.06 <br /> MW-5 Jan 90 ?-40 17.88 <br /> MW-6 Jan 90 ?-40 17.84 <br /> MW-7 Jan 90 ?-40 17.00 <br /> MW-8 Mar 90 ?-39 17.75 <br /> MW-9 Mar 90 ?-45 - <br /> MW-10 Aug91 ?-47 17.20 <br /> MW-11 Apr 08 ?-34 17.85 <br /> MW-13-50 A r 08 ?-50 17.45 <br /> MW-13-77 Apr 08 ?-77 17.50 <br /> MW-14-50 Apr 08 ?-50 17.42 <br /> MW-14-77 Apr 08 ?-78 17.40 <br /> MW-15-77 Apr 08 ?-77 17.45 <br /> MW-16-50 Jul 07 ?-50 18.30 <br /> MW-16-77 Jul 07 ?-77 18.38 <br /> MW-16-90 Jul 07 ?-98 18.40 <br /> MW-17-50 Jul 07 ?-52 18.25 <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 (ug/L WQOs <br /> Maximum Latest Maximum Latest (ug/L) <br /> * Dec 2010 <br /> TPH-c NA NA 4,700,000 41,000 5 <br /> Benzene NA NA 2,300 720 0.15 <br /> Tolueie NA NA 2,800 2,800 42 <br /> Eth (benzene NA NA 1,700 1,500 29 <br /> X lens NA NA 5,700 5,700 17 <br /> MTBE: NA NA . 23,000 120 5 <br /> TBA NA 1NA 7,300 140 12 <br /> 1,2-D ,A NA I NA 81 1 5.3 0.5 <br /> NA: Not Analyzed, Not Applicable or Data Not Available <br /> mg/kg milligrams per kilogram, parts per million <br /> ug/L:.micrograms per liter, parts per billion <br /> WQO�.: Water Quality Objectives <br /> 'Data�rom GeoTracker,site wells <br /> California En viroamental Protection Agency <br /> ,fl <br /> P.a R,,wed Paper <br />