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Table 2 /aRC�DIS Design&Con5l,lttancy <br /> i' buittasMarch 2018 Field and Analytical Results rsettands; <br /> 2018 Groundwater Monitoring Report <br /> Holcim (US) Inc. <br /> Florence, Colorado <br /> Analyte March 2018 Analytical Results <br /> 77 <br /> Ml <br /> Field Paramellers Units C,' <br /> gpLs"' <br /> NPLS <br /> pH std.units 6.5-8.5a 7.38 6.58 6.85 NA <br /> Specific Conductivity ms/cm NA 2.051 3.879 3.742 NA <br /> Temperature C NA 14.29 13.88 13.94 NA <br /> Laboratory Results <br /> Total dissolved solids mg/L 3918 984 3860 3850 3580 4026 <br /> Sulfate mg/L 2080 121 2300 2320 2070 2200 <br /> Iron(total) mg/L 4.5 4.65 7.91 7.4 7.98 NA <br /> Iron(dissolved) mg/L NA <0.02 U 0.08 1 0.64 <0.04 U 0.13 <br /> Manganese(dissolved) mg/L 0.88 <0.005 U 0.53 0.54 <0.01 U 0.3 <br /> Potassium(dissolved) mg/L 17 1 7.3 1 12.5 1 12.6 1 8 1 13 <br /> Sodium(dissolved) mg/L NA 260 128 128 178 NA <br /> mg L <br /> K:Na ratio '2- 0.5 0.028 0.098 0.098 0.045 0.5 <br /> Notes: <br /> NPLs-numeric protection levels issued by Division of Reclamation,Mining and Safety <br /> Bolded values-NPL exceeded <br /> 1-Sodium was removed as a groundwater quality parameter and replaced with a potassium to sodium(K Na)ratio per Division of Reclamation, <br /> 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 /> Tables 1204132018 Page 1 of 1 <br />