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this well during each of the quarterly samplings for 2004. For the final <br />,` three quarters of 2004 it was possible to obtain the requisite samples <br />following the standard three well volume purge procedure. While the well <br />bore recharge is still slow, it is finally showing indications that the highly <br />disturbed zone in the reclaimed overburden area is recharging. The timeline <br />for this recharge is not inconsistent with earlier predictions. <br />Copies of the summary analytical laboratory test results are available in the <br />pages following this text. Each ground water monitoring well was sampled <br />in accordance with the "permit procedure". The "B" designation following <br />the well identification indicates that the laboratory sample was obtained <br />after initial field sampling, well purging and a subsequent (second) field <br />sampling. (Again, the lack of available water in well AMW-2 limited the <br />ability to properly purge the well during the first quarterly sampling, only.) <br />The 2004 ground water monitoring test results remain consistent with <br />results from previous analyses in that there have been no confirmed <br />statistical exceedences, with the exception of samples recently drawn from <br />the SMW-2 well. This well is completed in the disturbed spoil material <br />which is being subjected to slow re-saturation by groundwater that appears <br />• to be leaching/dissolving minerals as the water level rises. This has caused <br />the manganese concentrations to slightly exceed the calculated tolerance <br />limit. CEC will address the tolerance limit exceedence during 2005. [See <br />Doty & Associates report dated 2/14/05, Fourth Quarter 2004 Ground- <br />Water Monitoring Data and Statistical Evaluation, Keenesburg Disposal <br />Site.] <br />The ground water flow, to the extent it has been documented in the area of <br />the Keenesburg Mine property, trends down-gradient to the northeast. <br />Recharge of the aquifer in the "spoil area" continues to be limited to a single <br />source, the localized infiltration of precipitation to the subsurface. There is <br />no evidence of any significant ground water recharge to the site from the <br />nearby Ennis Draw fluvial ground water system. Ground water elevations in <br />the sampled Ennis Draw wells close to the Keenesburg Mine site remain <br />significantly higher than in either the spoil monitoring well (SMW-2) or the <br />ash monitoring wells (AMW-1 and AMW-2}. <br />CEC continues to believe that no adverse affect on the overall hydrologic <br />. balance of the Keenesburg Mine site should result from a continuation of <br />the ash disposal operation, from the limited addition of mine waste rock to <br />AHR-2004 -51- <br />