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COAL <br />COMPANY <br />T �� <br />��gg <br />P.AEOPX1:' PRODDCTtOty'6�' <br />New Good Springs Well - NGSW (Down - Gradient): <br />Parameter <br />Mean <br />Std <br />dev <br />Range <br />Max. <br />Min. <br />Max at <br />Min at <br />Trend <br />Lab pH <br />7.75 <br />0.29 <br />1.7 <br />8.5 <br />6.8 <br />8119191 <br />10103100 <br />Level <br />Lab Cond. <br />1979.98 <br />275.02 <br />1550 <br />2700 <br />1150 <br />10117191 <br />04127198 <br />Increasing <br />TDS <br />954.96 <br />255.24 <br />2099.4 <br />2100 <br />780 <br />8113108 <br />04127198 <br />Increasing <br />Sulfate <br />766.30 <br />174.55 <br />1192 <br />1340 <br />148 <br />3117109 <br />515110 <br />Level <br />Calcium <br />157.87 <br />31.20 <br />130.3 <br />223 <br />92.7 <br />3127190 <br />1018198 <br />Decreasing <br />Iron <br />0.12 <br />0.14 <br />0.45 <br />0.46 <br />0.01 <br />8114197 <br />10/1/01 <br />Decreasing <br />Magnesium <br />155.83 <br />31.14 <br />154 <br />230 <br />76 <br />03127190 <br />04127198 <br />Decreasing <br />Sodium <br />81.48 <br />18.39 <br />140.3 <br />172 <br />31.7 <br />11118197 <br />04127198 <br />Decreasing <br />Elevation <br />6534.72 <br />2.00 <br />10.85 <br />6540.65 <br />6529.8 <br />03113193 <br />08131104 <br />Decreasing <br />As presented above, site water monitoring data corresponds with Colowyo's <br />Probable Hydrologic Consequences section in the PAP stating there will likely <br />be a slight increase in TDS due to mining activities. Conventional wisdom <br />would suggest that monitoring results should demonstrate mostly static <br />concentrations or level trends of monitored parameters over time at sampling <br />locations above gradient of mining activities. Further, one could reasonably <br />expect that monitoring locations below gradient or downstream from mining <br />activities would reveal trends increasing the concentration of certain <br />parameters. However, we see nearly the opposite phenomenon expressed. A <br />reasonable conclusion that can be reached from this situation is that at a <br />minimum, mining activities are not having a detrimental effect on the shallow <br />groundwater resource and if anything are leading to shallow groundwater <br />quality condition improvement. The data presented in the AHR and under this <br />cover suggest at a minimum that pollutants are not a concern in surface water <br />and shallow alluvial groundwater and a point(s) of compliance for the current <br />operation continues to be unjustified. <br />Additional relevant surface water monitoring results supporting the data <br />presented above is thirty years of NPDES discharge monitoring data. Results <br />indicate, with the exception of storm events and melting events, sampled <br />A Western Fuels- Colorado, LLC mining property <br />