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Analyte <br />MW -7 Compliance <br />March 2011 Analytical Results <br />Field Parameters <br />Standards <br />MW -7 <br />MW -7 DUP <br />MW -12 <br />MW -13 <br />pH (std. units) <br />6.5 -8.5 <br />7.98 <br />-- <br />6.87 <br />7.03 <br />Specific Conductivity (mS /cm) <br />NA <br />1.427 <br />-- <br />3.686 <br />3.287 <br />Temperature ( °C) <br />NA <br />14.0 <br />-- <br />15.8 <br />14.6 <br />Laboratory Results <br />Total dissolved solids <br />3918 <br />2760 <br />2740 <br />3970 <br />3180 <br />Sulfate <br />2080 <br />1600 <br />1500 <br />2400 <br />1770 <br />Iron (total) <br />4.5 <br />4.28 <br />5.13 <br />NA <br />NA <br />Iron (dissolved) <br />NA <br />U <br />0.07 <br />0.99 <br />U <br />Manganese (dissolved) <br />0.88 <br />0.147 <br />0.146 <br />0.551 <br />U <br />Potassium (dissolved) <br />17 <br />13.1 <br />13.1 <br />13.8 <br />8.9 <br />Sodium (dissolved) <br />226 <br />231 <br />232 <br />201 <br />_ 170 <br />MO I MI • -- MI MN r• r OM • M - -- all MS <br />Table 2 <br />March 2010 Field and Analytical Results <br />Holcim (US) Inc. <br />Florence, Colorado <br />Notes: <br />All units are in mg /L unless noted otherwise. <br />Bolded values - compliance standard exceeded. <br />U - The material was analyzed for, but was not detected above the level of the associated value. <br />The associated value is either the sample quantitation limit or the sample detection limit. <br />NA - Not available. <br />'MCL source: Table 2 Secondary Drinking Water Standards, Regulation 41. <br />MCL - Maximum concentration limit. <br />G:WProject\255.10 - Holcim\GW Monitoring Report \March 2011 \Tables \Tables 123_05312011.xls Page 1 of 1 <br />