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Table E-4 <br /> Groundwater Quality Data for Monitoring Wells MW-7,MW-12 and MW-13 in 2011 through 2013 <br /> Holcim(US)Inc. <br /> Florence,CO <br /> AnalyW MW-7 Compliance March 2011 Analytical Results March 2012 Analytical Results Sep-12 March 2013 nalytical Results MW-13 <br /> Field Parameters Standards MW-7 MW-7 DUP I MW-12 I MW-13 MW-7 MW-12 MW-12 DUP MW-13 MW-7 MW-7 MW-12 MW-12 DUP MW-13 NPLs <br /> pH std.units 6.5-8.5' 7.98 6.87 7.031 7.601 6.81 6.95 7.31 7.57 6.80 7.07 NA <br /> Specific ConductivitymS/cm NA 1.4271 3.686 3.287 1.7 4.0 3.7 3.3 3.280 3.899 3.559 NA <br /> Temperature °C NA 14.0' 15.8 14.6 14.2 14.0 14.0 14.7 14.2 13.96 14.17' NA <br /> NEW <br /> Total dissolved solids 39187231 <br /> 2740 3970 3180 810 3910 392043500 3270 2780 3870 3850 3480 4026 <br /> Sulfate 2080 1500 2400 1770 39 2300 2300 2100 1820 1700 2600 26 2200 - <br /> Iron otal 4.5 5.13 NA NA 13.8 NA NA NA' 9.9 4.26 NA NA NA NA <br /> Iron dissolved NAU 0.07 0.99 U U 0.19 0.10 0.04 B 0.09 B 0.10 0.34 0.32 U 0.13 <br /> Manganese dissolved 0.88 0.146 0.551 U U 0.54 0.54 U 0.165, 0.03 B 0.50 0.49 U 0.3 <br /> Potassium(dissolved) 17 13.1 13.8 8.9 5.2 13.6 13.5 8.9 12.3 12.1 12.8 12.0 8.6 13 <br /> Sodium(dissolved) 226 232 201 170 258 145 143 203 250 297 162 1 154 1201 274 <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 /> NPLs-numeric protection levels issued by Division of Reclamation,Mining and Safety <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 /> "DRMS-approved compliance standards for MW-7. <br /> "MCL source:Table 1 Human Health Standards,Regulation 41. <br /> `MCL source:Table 2 Secondary Drinking Water Standards,Regulation 41. <br /> °MCL source:Table 3 Agricultural Standards for Groundwater,Regulation 41. <br /> °MCL source:Table 4 TDS Water Quality Standards,Regulation 41. <br /> Page 1 of 1 <br />