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January T003 Ken Coal Compmry * 2002 AnnnalHydrology Report * CO Pesmit No. C-80-006 ~ PaRe 7 <br />4.0 MINE AREA ALLUVIAL GROUNDWATER <br />Field measurements were taken at alluvial well AO-2A on a monthly basis from March through <br />October. Field data are presented in Appendix A, 2002 Field Data. Water samples were collected <br />and analyzed on a quarterly basis, in April, July> and October 2002. As of January 1999, the <br />parameter list for alluvial well sample analysis was reduced to include only major elements and no <br />trace metals. The individual analyses of samples collected are presented in Appendix B, 2002 Mine <br />Area Alluvial Water Quality Analyses. Table 1, 2002 Groundwater~uality Statirtics, includes a summary <br />of the water quality data for well AO-2A for the 2002 water year. The mean Field and laboratory <br />parameter values for each of the past five yeazs axe presented in Table 3, Historic Mine Ana Alluvial <br />WaterQualily Data. The water levels recorded for AO-ZA over the last five yeazs are shown on Figure <br />1, Mine Ana Grouudmater Levels. Figure 2, EC vs. TDS-Well AO-2A, shows the relationship between <br />electrical conductance and total dissolved solids levels over the last five years. <br />Well AO-ZA is located in Bush Draw, downstream (east) of the northern extent of the reclaimed Pit 1 <br />area. In 1992, low water levels and the silted condition of well AO-2 resulted in the inability to collect <br />samples from this location. Well AO-2A was completed to a depth of 14 feet in January 1993 and <br />was placed adjacent to well AO-2, replacing the existing well. See Map 1, MineArea Monitariug Stations, <br />fox general well location. <br />MLVH * 1475 Pine Grove Rd, Ste. 109, * SteamGYat Springs, Colorado 80477 * (970) 8796260 <br />Y!\Y"V,Awr(m181TA..m'H}b. Wpn\XVIlYtl1 H~dWg, Rpr <br />I/l6/OJ~p'. <br />