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Parameter <br />MW -0 <br />MW -1 <br />Sump 9 <br />Mine Pool <br />Sump 10 <br />MW -3A <br />Sump 4 <br />MW -9 <br />Sump 5 <br />MW -6 <br />8/5/2011 <br />8/11/2011 <br />6/8/2011 <br />6/22/2011 <br />6/29/2011 <br />5/19/2011 <br />2/9/2011 <br />5/12/2011 <br />6/2/2011 <br />6/23/2011 <br />pH (s.u.) <br />7.2 ' <br />6.82 <br />7.23 <br />7.3 <br />7.1 <br />7.49 <br />7.26 <br />7.2 <br />7.21 <br />7.3 <br />TDS <br />361 <br />282 <br />301 <br />3080 <br />2120 <br />424 <br />383 <br />641 <br />503 <br />721 <br />Bicarbonate <br />136 <br />131 <br />112 <br />476 <br />303 <br />128 <br />125 <br />156 <br />131 <br />166 <br />Calcium <br />46.8 <br />43.4 <br />49.7 <br />374 <br />228 <br />65.2 <br />60.7 <br />100 <br />78.5 <br />97.9 <br />Magnesium <br />18.6 <br />15.2 <br />17.7 <br />219 <br />158 <br />25.6 <br />22.8 <br />42.1 <br />32.8 <br />41.6 <br />Sodium <br />12.5 <br />13.3 <br />14.9 <br />153 <br />109 <br />23.6 <br />20.9 <br />34.3 <br />27.8 <br />31.3 <br />Potassium <br />2.5 <br />2.4 <br />2.5 <br />23.1 <br />11.9 <br />3.3 <br />2.5 <br />4.3 <br />4 <br />4.7 <br />Chloride <br />33 <br />32 <br />36 <br />24 <br />27 <br />38 <br />35 <br />3.7 <br />35 <br />38 <br />Sulfate <br />81 <br />67 <br />95 <br />1860 <br />1090 <br />165 <br />142 <br />326 <br />239 <br />334 <br />Iron <br /><0.03 <br /><0.03 <br /><0.03 <br />3.78 <br /><0.03 <br /><0.03 <br /><0.03 <br /><0.03 <br /><0.03 <br /><0.03 <br />Manganese <br /><0.005 <br /><0.005 <br /><0.005 <br />4.56 <br />0.033 <br /><0.005 <br /><0.005 <br /><0.005 <br /><0.005 <br /><0.005 <br />Molybdenum <br />0.022 <br />0.007 <br />0.012 <br />1.6 <br />0.16 <br />0.031 <br />0.014 <br />0.029 <br />0.026 <br />0.032 <br />Uranium <br />0.394 <br />0.262 <br />0.322 <br />26.4 <br />16.6 <br />1.64 <br />1.4 <br />3.05 <br />2.19 <br />2.59 <br />Radium - 226 (pCi /L) <br />0.37 <br />0.27 <br />0.28 <br />202 <br />0.60 <br /><0.16 <br />0.59 <br />0.18 <br />0.59 <br />0.67 <br />ame0 <br />Table 1: Recent groundwater chemistry results from monitoring wells and sumps across the site. Concentrations in mg /L <br />except where indicated. <br />1 Previous quarterly sampling value. <br />AMEC Environment & Infrastructure <br />118 E. 29 Street, Suite C <br />Loveland, Colorado 80538 <br />Tel (303) 630-0788 <br />Fax (970) 669 -0003 <br />