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Table 2 <br />March 2013 Field and Analytical Results <br />Holcim (US) Inc. <br />Florence, Colorado <br />Anal to <br />Units <br />MW -7 Compliance <br />Standard <br />March 2013 Anal tical Results <br />MW -13 <br />NPLs <br />Field Parameters <br />MW -7 <br />MW -12 <br />MW -12 DUP <br />MW -13 <br />pH <br />std. units <br />6.5 -8.53 <br />7.57 <br />6.80 <br />7.07 <br />NA <br />Specific Conductivity <br />ms/cm <br />NA <br />3.280 <br />3.899 <br />3.559 <br />NA <br />Temperature <br />C <br />NA <br />14.2 <br />13.96 <br />-- <br />14.17 <br />NA <br />Laboratory Results <br />Total dissolved solids <br />mg /L <br />3918 <br />2780 <br />3870 <br />3850 <br />3480 <br />4026 <br />Sulfate <br />mg /L <br />2080 <br />1700 <br />2600 <br />2600 <br />2300 <br />2200 <br />Iron (total) <br />mg /L <br />NA <br />4.26 <br />NA <br />NA <br />NA <br />NA <br />Iron (dissolved) <br />mg /L <br />4.5 <br />0.10 <br />0.34 <br />0.32 <br />U <br />0.13 <br />Manganese (dissolved) <br />mg /L <br />0.88 <br />0.03 <br />B <br />0.50 <br />0.49 <br />U <br />0.3 <br />Potassium (dissolved) <br />mg /L <br />17 <br />12.1 <br />12.8 <br />12.0 <br />8.6 <br />13 <br />Sodium (dissolved) <br />mg /L <br />226 <br />297 <br />162 <br />154 <br />201 <br />274 <br />Notes: <br />NPLs - numeric protection levels issued by Division of Reclamation, Mining and Safety <br />Bolded values - NPL 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 />B - Analyte concentration detected at a value between Method Detection Limit and Practical Quantitation Limit. The associated value is an estimated quantity. <br />NA - Not available. <br />'MCL source: Table 2 Secondary Drinking Water Standards, Regulation 41. <br />MCL - Maximum concentration limit. <br />C:\ Users \lyusko \Documents \Holcim \March 2013 \Holcim 2013 DRAFT GWM Report\March 2013 \Tables \Tables 123_05152013.xls Page 1 of 1 <br />