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Table E -4 <br />Groundwater Quality Data for Monitoring Wells MW -7, MW -12 and MW -13 in 2011 and 2012 <br />Holcim (US) Inc. <br />Florence, CO <br />Analyte <br />MW -7 Compliance <br />March 2011 Analytical Results <br />March 2012 Anal tical Results <br />Sep -12 <br />Field Parameters <br />Standards <br />MW -7 <br />MW -7 DUP <br />MW -12 <br />MW -13 <br />MW -7 <br />MW -12 <br />MW -12 DUP <br />MW -13 <br />MW -7 <br />pH (std. units) <br />6.5 -8.5a <br />7.98' <br />6.87 <br />7.031 <br />7.60 <br />6.81 <br />6.95 <br />7.31 <br />Specific Conductivity (mS /cm) <br />NA <br />1.427 <br />3.686 <br />3.287 <br />1.7' <br />4.0 <br />3.7 <br />3.3 <br />Temperature ( °C) <br />NA <br />14.0 <br />-- <br />15.8 <br />14.6' <br />14.2 <br />14.0 <br />14.0 <br />14.7 <br />Laboratory Results <br />Total dissolved solids <br />3918 <br />2760 <br />2740 <br />3970 <br />3180' <br />810 <br />3910 <br />3920 <br />3500 <br />3270 <br />Sulfate <br />2080 <br />1600' <br />1500 <br />2400 <br />1770 <br />391 <br />2300 <br />2300 <br />21001 <br />1820 <br />Iron (total) <br />4.5 <br />4.281 <br />NA <br />NA <br />13.8' <br />NA <br />NA <br />NA <br />9.9 <br />Iron (dissolved) <br />NA <br />U <br />0.07 <br />0.99 <br />U <br />I U <br />0.19 <br />0.10 <br />0.04 <br />B <br />0.09 B <br />Manganese (dissolved) <br />0.88 <br />0.147 <br />0.146 <br />0.551 <br />U <br />i U <br />0.54 <br />0.541 <br />1 U <br />0.165 <br />Potassium (dissolved) <br />17 <br />13.1 ! <br />13.1 <br />13.8 <br />8.9 <br />5.21 <br />13.6 <br />13.5 <br />8.9 <br />12.3 <br />Sodium (dissolved) <br />226 <br />231 <br />232 <br />201 <br />170 <br />2581 <br />145 <br />143 <br />203 <br />250 <br />Notes: <br />All units are in mg /L unless noted otherwise. <br />Bolded values - Screening level exceeded. <br />B - Analyte concentration detected at a value between Method Detection Limit and Pratical Quantitation Limit. <br />bkg - Background. <br />MCL - Maximum concentration limit. <br />NA - Not available. <br />U - The analyte was analyzed for, but not detected. Detection limit is numeric value shown. <br />Multiple screening levels present in some instances due to proposed background standardsfor MW -7. <br />aDRMS- approved compliance standards for MW -7. <br />bMCL source: Table 1 Human Health Standards, Regulation 41. <br />`MCL source: Table 2 Secondary Drinking Water Standards, Regulation 41. <br />dMCL source: Table 3 Agricultural Standards for Groundwater, Regulation 41. <br />'MCL source: Table 4 TDS Water Quality Standards, Regulation 41. <br />