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2014 Groundwater <br /> ARCADIS Monitoring Report <br /> Florence,Colorado <br /> 4. Conclusions and Recommendations <br /> Based on the information presented in this report, we have concluded the following: <br /> • The March 2014 results at well MW-7 appear to be similar to the March 2013 <br /> results for manganese, TDS, and sulfate. The potassium to sodium ratio remains <br /> low in this well. <br /> • The sodium concentration in monitoring well MW-7 exceeded the DRMS <br /> compliance standard by slightly more than 10 percent. No other analytes <br /> exceeded the compliance values. <br /> • Generally stable or decreasing trends for manganese, TDS, sulfate, and potassium <br /> to sodium ratios continue to be observed in wells MW-12 and MW-13. <br /> • For the downgradient well MW-13, concentrations were below the NPLs for all <br /> analytes. <br /> • Groundwater flow is to the south and velocity is 0.3 to 2 ft/yr, which is consistent <br /> with historical data. In addition, groundwater elevations and interpreted flow <br /> direction are similar to previous sample rounds. <br /> March 2014 sampling results indicate that sodium concentration in groundwater from <br /> MW-7 remains slightly higher than the NPL. No other analytes were above the NPL for <br /> MW-7.Additionally, no analytes exceeded the NPLs for groundwater from MW-13. <br /> Based on March 2014 sampling results that indicate there is no discernible impact from <br /> CKD, ARCADIS recommends that annual groundwater monitoring continue unless <br /> future results require in increased monitoring frequency. <br /> 10 <br />