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Table 2 <br /> April 2016 Field and Analytical Results <br /> Holcim(US)Inc. <br /> Florence,Colorado <br /> Analyte MW-7 April 2016 Analytical Results MW-13 <br /> Field Parameters Units NPLs MW-7 MW-12 MW-12 DUP MW-13 NPLs <br /> pH std.units 6.5-8.5a 7.08 6.36 -- 6.54 NA <br /> Specific Conductivity mS/cm NA 2.277 3.849 -- 3.744 NA <br /> Temperature °C NA 14.9 14.46 -- 14.05 NA <br /> Laboratory Results <br /> Total dissolved solids mg/L i 3918 994 3940 3940 3800 4026 <br /> Sulfate mg/L 2080 231 2320 2320 2130 2200 <br /> Iron(total) mg/L NA 8.05 4.9 7.15 8.54 NA <br /> Iron(dissolved) mg/L 4.5 0.12 0.39 0.44 0.08 B 0.13 <br /> Manganese(dissolved) mg/L 0.88 0.005 B 0.53 0.53 U 0.3 <br /> Potassium(dissolved) mg/L 17 7.2 13 13.1 8.7 13 <br /> Sodium(dissolved)' mg/L _ NA 230 133 134 186 NA <br /> K:Na ratio mg/L 0.5 0.031 0.098 0.098 0.047 0.5 <br /> Notes: <br /> NPLs-numenc 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 /> 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 applicable <br /> Nan-Not Analyzed <br /> 'MCL source:Table 2 Secondary Drinking Water Standards,Regulation 41. <br /> MCL-Maximum concentration limit. <br /> P:\AProject\255.10 Holcim\GW Monitoring Report\March 2016\1-Tables\Tables 1,2_04292016 Page 1 of 1 <br />