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50 6 <br /> 45 _ <br /> 4 <br /> 40 Stockpile removed <br /> October 2007 <br /> 35 2 c <br /> o <br /> o � 30 0 m � <br /> cyaC- wcc <br /> m <br /> � U) 25 <br /> U <br /> /A <br /> o 20 IA\ 2 = E <br /> U 11 <br /> y <br /> E 15 DA 4 <br /> 10 <br /> N-A if <br /> -6 <br /> 5 <br /> 0 -8 <br /> Dec-01 Dec-02 Dec-03 Dec-04 Dec-05 Dec-06 Dec-07 Dec-08 Dec-09 Dec-10 Dec-11 <br /> Date <br /> Explanation: <br /> 0 Total Chromium <br /> —a Dissolved Chromium <br /> —h Dissolved Hexavalent Chromium <br /> —*—Groundwater Elevation Cr and Cr VI CONCENTRATION VS. TIME <br /> Well LPW-1 <br /> Notes: MonierLifetile LLC Lathrop Facility <br /> 1.Concentrations reported as non-detect were assigned the Lathrop, California <br /> value of one-half the laboratory reporting limit. <br /> 2.Cr=chromium;Cr A=hexavalent chromium. <br /> By:TP Date:11/17/10 Project No.10626 <br /> AMEC Geomatrix Figure 7 <br />