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Analyte <br />Units <br />MW -7 Compliance <br />Standards <br />3/1/12 <br />9128/12 <br />Field Parameters <br />MW -7 <br />MW -7 <br />pH <br />std. units <br />6.5 -8.5 <br />7.60 <br />7.31 <br />Specific Conductivity <br />mS /cm <br />NA <br />1.7 <br />3.3 <br />Temperature <br />°C <br />NA <br />14.2 <br />14.7 <br />Laboratory Results <br />Total dissolved solids <br />mg /L <br />3918 <br />810 <br />3270 <br />Sulfate <br />mg /L <br />2080 <br />39 <br />1820 <br />Iron (total) <br />mg /L <br />4.5 <br />13.8 <br />9.9 <br />Iron (dissolved) <br />mg /L <br />NA <br />U <br />0.09 <br />B <br />Manganese (dissolved) <br />mg /L <br />0.88 <br />U <br />0.165 <br />Potassium (dissolved) <br />mg /L <br />17 <br />5.2 <br />12.3 <br />Sodium (dissolved) <br />mg /L <br />226 <br />258 <br />250 <br />Table 2 <br />2012 MW -7 Field and Analytical Results <br />Holcim (US) Inc. <br />Florence, Colorado <br />Notes: <br />Bolded values - compliance standard exceeded <br />U - The matenal 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 \2012 MW -7 Redevelop \Summary Letter \Tables 12_11272012_ly.xls Page 1 of 1 <br />