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Marc Mme - 2005 Annual Hydn)logy Repoli February 2006 <br />5.0 LOADOUT AREA ALLUVIAL GROUNDWATER <br />Two alluvial wells (AP-1 and AP-2) were monitored for field measurements in October 2004 and <br />then on a monthly basis from March through September 2005 in accordance with the permit. <br />Field data collected are presented in Appendix A, 2005 Field Data. Figure 3, Alluvial Water <br />Levels, presents groundwater levels measured since July 1996. Water levels had returned to <br />historic levels In both wells following a low water (drought) year in 2002 although AP-1 levels are <br />slightly down in 2005. <br />Water quality samples were collected and analyzed on a quarterly bases in October 2004 and In <br />April and July, 2005. As of January 1999. the parameter list for alluvial well sample analysis was <br />reduced to include only major elements and no trace metals. This data has been summarized <br />and is presented in Table 1, 2005 Groundwater Quality Statistics. The individual laboratory <br />analyses are presented in Appendix C. <br />FIGURE 3 <br />ALLUVIAL WATER LEVELS <br />The mean field and laboratory measurements for each of the last 8 years are presented in Tables <br />8 and 9 AP-1 and AP-2 Historic Loadout Area AHuwal Water Quality Data. Figure 4, EC vs. TDS- <br />Well AP-1, and Figure 5, EC vs. TDS-Well AP-2, show comparisons of EC to TDS concentrations <br />over the last 8 years. These general water quality indicators remained consistent during this <br />morntonng period for both wells. The EC in both wells has apparently dropped below historic <br />levels possibly due to field equipment malfunction. <br />-05 <br />~ -1 5 <br />0 <br />g -2 <br />m -2 5 <br />w <br />u. ~ <br />-3 5 <br />Page 10 <br />J <br />Jul•98 JW-B7 Jul•9B Jul-99 Jul-00 Jul-01 Jul-02 Jul-03 Jul-0A Jul-05 <br />DATE <br />^ AP-1 AP-2 <br />