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Table 2 <br /> March 2017 Field and Analytical Results <br /> Holcim(US)Inc. <br /> Florence,Colorado <br /> Anal a MW-7 March 2017 An lytical Results MW-13 <br /> Field Parameters Units NPLs MW-7 MW-12 MW-12 DUP MW-13 NPLs <br /> H std. unit 6.5-8.5a 7.32 6.45 6.86 NA <br /> Specific Conductivity mS/cm NA 1.257 3.854 -- 3.288 NA <br /> Temperature °C NA 14.8 14.44 -- 14.63 NA <br /> Laboratory Results <br /> Total dissolved solids m /L 3918 1120 3730 3790 3170 4026 <br /> Sulfate m /L 2080 326 2430 2390 1980 2200 <br /> Iron total m /L 4.5 6.05 6.63 4.65 1.53 NA <br /> Iron dissolved m /L NA 0.13 0.43 0.35 0.09 J 0.13 <br /> Manganese dissolved m /L 0.88 0.009 J 0.52 0.51 0.01 J 0.3 <br /> Potassium dissolved m /L 17 7.41 1 12.31 1 12.11 1 7.51 13 <br /> Sodium(dissolved) m /L NA 233 1 1241 1 1221 1 135 1 NA <br /> K:Na ratio mg/L 0.5 0.0321 1 0.0991 1 0.0991 1 0.0561 1 0.5 <br /> Notes: <br /> NPLs-numeric protection levels issued by Division of Reclamation,Mining and Safety <br /> Bolded values-NPL exceeded <br /> -Sodium was removed as a groundwater quality parameter and replaced with a potassium to sodium(K:Na)ratio per Division of-Reclamation,Mining and Safety approval letter dated February 25,2015. <br /> K-potassium <br /> Na-sodium <br /> J-Analyte concentration detected at a value between MDL and PQL.The associated value is an estimated quantity. <br /> NA-Not applicable. <br /> 'MCL source:Table 2 Secondary Drinking Water Standards,Regulation 41. <br /> MCL-Maximum concentration limit. <br /> MDL-Method Detection Limit <br /> PQL-Practical Quantitation Limit <br /> P:\AProject\255.10 Holcim\GW Monitoring Report\March 2017\1-Tables\Tables 1,2_04262017 Page 1 of 1 <br />