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3 <br />indicate values that exceed either the Numeric Protective Level (NPL) or the <br />Early Warning Indicator (EWI) level established under the original MLRB 112 <br />permit. Charts of this data are presented in the following pages for reference. <br />Generally, the outlying data fluctuates very little from the NPL or EWI. In many <br />instances, the variations observed are similar to natural phenomenon. Dissolved <br />barium flags just above the baseline established levels in a number of the <br />monitoring wells. In the production stream dissolved barium is also present in <br />generally the same concentrations as observed in the monitoring wells. Because <br />other indicator constituents are not also flagging higher than baseline levels <br />along with the elevated barium and because barium is indicated in a number of <br />wells representing several aquifer locations in an intermittent random pattern, <br />including up gradient control locations, it is thought to be more of a natural <br />phenomenon or related to drilling and not linked to solution mining activity. <br />Monitoring for dissolved barium will continue. <br />The water level data represented in the chart for Well 21-3A shows a drop of <br />approximately 10 feet of elevation in the beginning of the third quarter 2004. It is <br />not possible to identify conclusively what may have caused the substantial drop <br />but there are a couple of incidents that have been considered. <br />A drilling rig was on location at production well 20-12 working on the well in an <br />attempt to identify and repair the area where the tubing was thought to be <br />damaged, This well is up gradient from the 21-3 multiple completion well just <br />opposite the former test mine pad. <br />In addition to activity at the production well, there was an unintentional overtlow <br />of dissolution surface water from the tubing used to sample well 21-3D which is <br />completed in the same casing (multiple completion well 21-3D, 21-3B, 21-3A, <br />and 21-3U). In early June 2004, the sampling line from the lower aquifer <br />dissolution surface overflowed into the top of the well casing containing all 4 <br />