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3.2.5 Chloride <br />Chloride concentrations have exceeded the SDWS only in CRMW09 from October 2006 through October 2007. The baseline <br />level for CRMW09 and CRMW16 was not established in the WOBR because only two samples were reported at that time. <br />CRMW09 chloride concentration is higher than any of the other wells tested as shown below. The baseline level for <br />CRMW01, CRMW02 and CRMW41 has also been adjusted to reflect data collected from October 2005 through October 2007 <br />since no mining activities have taken place in the area of these two wells. <br />Chloride <br /> Wells (CRMW) SitelGroup <br /> <br /> O1 02 04 05 O6 07 09 16 40 41 42 AVG <br />Oct-05 137 156 147 95 126 128 •--- ---- 106 104 ---- 124.8 <br />Nov-05 139 161 114 146 119 122 225 120 102 113 129 135.5 <br />Dec-OS 139 150 115 ---- 113 107 ---- ---- 103 119 ---• 120.9 <br />Apr-O6 134 138 122 ---- 112 100 ---- ---- 92 117 ---- 1 i6.5 <br />Jul-06 155 163 82 ---- 123 100 ---- ---- 85 121 -•-• 118.4 <br />Oct-06 171 158 110 94 96 123 256 122 107 127 127 135.6 <br />Dec-06 173 154 113 ---- --•- ---- 252 125 ---- ---- ---- 163.5 <br />Apr-07 141 147 88 ---- 97 ---- 252 117 ---- 125 ---- 138.3 <br />Jul-07 151 148 50 •--• 96 ---- 228 116 ---- 175 95 132.4 <br />Oct-07 199 140 87 117 112 ---- 265 119 82 189 100 140.9 <br />Average 153.9 151.5 102.8 113.2 110.4 113.4 246.4 119.8 96.7 132.3 112.9 132.4 <br />Stnd Dev. 21.1 8.4 26.7 24.3 11.5 12.6 16.3 3.4 10.3 29.4 17.6 41.7 <br />2006 <br />E~aseline 160 163 158 ---- 158 158 ---- ---- 158 158 ---- 158 <br />2007 <br />Baseline 175 160 158 ---- 158 158 263 158 158 162 ---- 158 <br /> <br />The average site-wide result for chloride has increased 5.9 mg/L from the W~BR to 132.4 mg/L with a standard deviation of <br />41.7 mg/L. <br />• <br />Lupton Lakes -11- January 2008 <br />