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Natural Soda, LLC 2014 Project Status Report & Annual Plan of Development <br />5.1.3 Monitoring Wells <br />Per regulatory requirements, dedicated monitoring wells have been constructed to <br />monitor four water - bearing zones; Perched, A- Groove, B- Groove, and the Dissolution <br />Surface aquifers. The aquifers are monitored at several locations across the solution <br />mining area; down - gradient, up- gradient, remote down - gradient, and east near the <br />southeast portion of Section 26. Refer to Figure 3 and Figure 4 for well locations. <br />Baseline and current ground water monitoring data have been obtained from 1991 <br />through present. Within NS's lease boundaries, there are three aquifers defined by US <br />' EPA as underground sources of drinking water (USDW): the Perched, A- Groove and B- <br />Groove Aquifers. The Dissolution Surface Aquifer is not designated as an underground <br />source of drinking water. <br />The Perched Aquifer is characteristically lower in total dissolved solids (TDS), <br />conductivity, fluoride, SAR (sodium absorption ratio) and moderate to higher in sulfate <br />and pH. The A- Groove and B- Groove aquifers are similar in water quality with <br />' moderate TDS, conductivity, SAR, but higher fluoride. However, the B- Groove aquifer <br />generally has slightly higher levels of TDS, conductivity, SAR, and fluoride. The <br />Dissolution Surface Aquifer is characterized by very high TDS and conductivity, higher <br />' SAR, magnesium, potassium, and a moderate pH. <br />In 2014 the results of groundwater monitoring were analyzed for potential anomalies in <br />order to prevent or mitigate potential negative impacts to the USDW's. <br />Appendix A contains detailed sampling results for all ground water monitoring wells. <br />' 5.1.4 Process Ponds <br />The process ponds at the NS site have a secondary liner, which collect and direct any <br />condensation or leakage to the leak detection tube for removal. Weekly collection and <br />removal of leachate continued in 2014. Process pond information is provided on a <br />monthly basis. <br />DAUB & ASSOCIATES, INC. , ,. 22 January 2015 <br />