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P:\10626.000.00ocs\Semi-Annual Groundwater Monitoring&Sampling\Lathrop Monthly Groundwater Monitoring\Figures\Figure_6-8-10.xls <br /> 50 6 <br /> 45 <br /> 4 aD <br /> ar 40 - - - - Stockpile removed <br /> Z October 2007 0 <br /> a 35 __ - - 2 <br /> y R <br /> 4) <br /> R 30 - <br /> t� 0 O <br /> O <br /> U_ <br /> 25 - _. <br /> E O <br /> O 20 - - -2 > <br /> w d <br /> ` W <br /> W L <br /> 15 - - 4 <br /> co <br /> � 3 <br /> U 10NA <br /> - <br /> -6 0 <br /> 5 -- C9 <br /> 0 -8 <br /> Dec-01 Dec-02 Dec-03 Dec-04 Dec-05 Dec-06 Dec-07 Dec-08 Dec-09 Dec-10 <br /> Explanation: Date <br /> 0 Total Chromium <br /> E Dissolved Chromium <br /> --&—Dissolved Hexavalent Chromium Cr and Cr VI CONCENTRATION VS. TIME <br /> Groundwater Elevation MONITORING WELL LPW-1 <br /> MonierLifetile LLC Lathrop Facility <br /> Notes: Lathrop, California <br /> 1. All concentrations reported as non-detect were assigned the value of <br /> one-half the laboratory reporting limit. <br /> 2. Cr=chromium;Cr VI = hexavalent chromium. B :TP Date:04/27/10 Pro ect No. 10626.000 <br /> AMEC Geomatrix Figure 6 <br />