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During the sixth operational quarter, eight ground water monitoring wells, indicate <br />values that exceed either the Numeric Protective Level {NPL) or the Early <br />Warning Indicator (EWI) level established under the MLRB 112 permit. Charts of <br />this data are presented in the following pages for reference. Generally the <br />outlying data fluctuates very little from the NPL or EWI. The variations observed <br />are similar to natural phenomenon and the variability is not consistently trending <br />in one direction nor does it correspond with other outlying indicator constituents. <br />In one instance, Well 19-2, dissolved barium levels have trended upward with no <br />corresponding increases in any of the other indicator constituents. It is highly <br />likely that this trend results from leaching of barium from the materials that were <br />used to plug off the well when it ignited during coring due to the high methane in <br />the formation. When several purge volumes are extracted from this well using <br />' the micro purge equipment the barium levels begin to drop. <br />Fluoride values in Well 21-3U have periodically spiked above the <br />25 mg/L NPL established for this point of compliance well since mining <br />' operations began in October 2000, however, spikes were also randomly <br />observed at this point during baseline monitoring before mining began. <br />