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Sample Date <br />4 26,2007 <br />10, 18 2010 <br />11 8 2010 <br />12 8 2010 <br />6 22 2011 <br />8 24 2011 <br />9/20 2011 <br />10'26'2011 <br />ANerage <br />mill1u011i: <br />MEI <br />$L <br />Alkahmty4CaCO31 <br />mg /L <br />_ <br />355 <br />357 <br />359 <br />345 <br />321 <br />321 <br />311 <br />347 <br />Chlorde <br />mg/L <br />1 <br />195 <br />187 <br />201 <br />185 <br />188 <br />172 <br />169 <br />205 <br />Fluoride <br />mg /L <br />0.1 <br />0.9 <br />0.9 <br />0.8 <br />0.8 <br />0.8 <br />0.8 <br />0.8 <br />0.9 <br />N as Name <br />mg/L <br />0.1 <br />0 <br />0 <br />0 <br />0 <br />0 <br />0 <br />0 <br />0 <br />Sulfate <br />mg /L <br />1 <br />2580 <br />1560 <br />1520 <br />1570 <br />1490 <br />1480 <br />1380 <br />1390 <br />2139 <br />Boron <br />mg/L <br />0.1 <br />0.3 <br />0.3 <br />0.4 <br />0.4 <br />0.3 <br />0.2 <br />0.3 <br />0.3 <br />Calcium <br />mg /L <br />182 <br />186 <br />196 <br />197 <br />198 <br />191 <br />190 <br />202 <br />Magnesium <br />mg/L <br />165 <br />166 <br />175 <br />171 <br />168 <br />161 <br />165 <br />189 <br />N as Nnrate +Nrtnte <br />mg /L <br />0.1 <br />50 <br />43 <br />4.6 <br />46 <br />51 <br />50 <br />43 <br />45 <br />65 <br />Uranium ug/L 1 1505 70 3253 690 2080 <br />Vanadium ug /L 100 2800 nd 4100 1100 <br />Zinc ug/L 1 70 nd 140 10 <br />8.7 Proposed Groundwater Monitoring Plan <br />Baseline conditions for the existing monitoring well have been established and the results <br />are reported in Table 4 in Section (9). More than five quarters of sampling data as <br />required by the DRMS regulations have been collected. The sampling results generally <br />show only minor variations in the selected constituents. With baseline conditions <br />established and the low groundwater transport velocities, Cotter proposes a yearly <br />sampling program for the existing monitoring well targeting uranium ore related <br />constituents. Sampling will continue during the operation of mine and will cease once <br />mining is completed and the site reclaimed. <br />Cotter believes that the existing monitoring well provides ambient groundwater quality <br />conditions in the Salt Wash sandstone and is properly located to detect impacts to the <br />groundwater from underground mining and surface storage of waste rock. If DRMS <br />deems that another "background" well is required, then Cotter will install a well on <br />Monogram Mesa that intersects the Salt Wash sandstone north of the existing mine <br />workings. This location is based on the assumption that groundwater flows along the dip <br />of the bedrock. Following DRMS regulations, five quarters of water samples will be <br />taken and the results submitted to DRMS. Once the five quarters of sampling is <br />completed, then Cotter proposes to conduct yearly sampling, consistent with the existing <br />monitoring well. <br />(9) Groundwater Quality Data <br />Water sample results for the monitoring well sampling program are presented in Table 4. <br />Table 4 Groundwater Quality Data for the Monitoring Well at the JD -9 Mine Site <br />O'Connor Design Group Inc. <br />U -20 <br />