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Cal Truck Lines -2- January 10, 2011 <br /> Claim No. 8489 <br /> B. Monitoring Well Information <br /> Well Designation Date Installed Screen Interval Depth to Water <br /> (feet bgs) (feet bgs) <br /> (Feb 2010 <br /> MW-1 Dec 99 30-50 27.10 <br /> MW-2 Apr 00 30-50 31.25* <br /> MW-3 Dec 99 30-50 26.98 <br /> MW-4 Nov 00 27-50 26.52 <br /> *Free product in well. <br /> IV. MAXIMUM DOCUMENTED CONTAMINANT CONCENTRATIONS <br /> Contaminant Soil m ik Water (ug/L WQOs <br /> Maximum Latest Maximum Latest (ug/L) <br /> Feb 2010 <br /> TPH-g NA NA 240,000 4,870 5 <br /> TPH-d NA NA 83,000 19,000 56 <br /> Benzene NA NA 6,600 1,250 0.15 <br /> Toluene NA NA 19,000 1,220 42 <br /> Eth (benzene NA NA 2,400 842 29 <br /> Xylenes NA NA 17,000 2,600 17 <br /> MTBE NA NA 1,591 <5 5 <br /> TBA NA NA 117 <5 12 <br /> 1,2-DCA NA NA 315 9.5 0.4 <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 /> WQOs: Water Quality Objectives <br /> V. FREE PRODUCT: MW-2 has contained up to 1.8 feet of free product. Between <br /> Jan 00 and the present, 24.2 gallons of free product has been removed. Free product <br /> continues in MW-2 in February 2010 (4.15 feet). <br /> 2% <br /> 200 <br /> a t-50 <br /> 0.50 - — <br /> J-00 Au0-00 Mar-01 Otl-01 Mftt2 :)ft-02 JW-03 FwO4 Sep-04 Apr-o5 Nov-05 Ju1-06 Jan-07 Au¢07 MW-08 Od-00 Wy-09 D-09 <br /> Date <br /> California Environmental Protection Agency <br /> 0 A <br /> Recycled Paper <br />