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Anal <br />Field <br />pH <br />std. units <br />MW Y' Compliance <br />Standards <br />6.5 -8.5 <br />7.60 <br />March,2012 Ana <br />6.81 <br />ca - eSUltd <br />— <br />.1 °6, ,ire <br />6.95 <br />NA <br />Specific Conductivity <br />mS /cm <br />NA <br />1.7 <br />4.0 <br />-- <br />3.7 <br />NA <br />Temperature <br />°C <br />NA <br />14.2 <br />14.0 <br />-- <br />14.0 <br />NA <br />Laboratory Results <br />Total dissolved solids <br />mg /L <br />3918 <br />810 <br />3910 <br />3920 <br />3500 <br />4372 <br />Sulfate <br />mg /L <br />2080 <br />39 <br />2300 <br />2300 <br />2100 <br />2585 <br />I ron (total) <br />mg /L <br />4.5 <br />13.8 <br />NA <br />NA <br />NA' <br />NA <br />I ron (dissolved) <br />mg /L <br />NA <br />U <br />0.19 <br />0.10 <br />0.04 B <br />0.19 <br />Manganese (dissolved) <br />mg /L <br />0.88 <br />U <br />0.54 <br />0.54 <br />U <br />0.69 <br />Potassium (dissolved) <br />mg /L <br />17 <br />5.2 <br />13.6 <br />13.5, <br />8.9 <br />17 <br />Sodium (dissolved) <br />mg /L <br />226 <br />258 <br />145 <br />143 <br />203 <br />274 <br />Table 2 <br />March 2012 Field and Analytical Results <br />Holcim (US) Inc. <br />Florence, Colorado <br />Notes: <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 />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 2012 \March 2012 GWMR \Tables \Tables 123_04112012_ly.xls Page 1 of 1 <br />