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Baseline Hydrologic Monitoring Plan — Hansen Project 35 <br />Tep = Echo Park Formation <br />Ttml = Thirtynme Mile Andesite <br />Tic = Tallahassee Creek Conglomerate <br />Twin = Wall Mountain Tuff <br />Any additional Cyprus wells that are selected for water level monitoring will be located, total depth will be <br />tagged, and water level will be sounded. Well integrity will be investigated with a downhole camera, and if <br />the well is considered sound at depth, the well will be re- developed by pumping with a submersible pump <br />until at least six well volumes are removed and field parameters (temperature, pH, conductivity) are stable. <br />The surface completion will be repaired if necessary, and a locking steel surface casing will be installed. <br />4.1.2 Proposed New Monitoring Well Locations <br />Five additional monitoring wells were planned at two locations for baseline characterization of the Hansen <br />ore deposit (Black Range Minerals, 2013). The locations of the two well clusters are shown as MW -F and <br />MW -DG 4 in Figure 12 and well depths are shown in Table 13. The new monitoring well locations are <br />designed to characterize water quality and water levels in the various stratigraphic horizons (Precambrian <br />basement, Echo Park Formation, Tallahassee Creek Formation, Thirtynine Mile Andesite, and alluvium) <br />upgradient and downgradient of the Hansen ore deposit. Additional monitoring wells are proposed <br />upgradient of the project (MW -UP). The well clusters will be used to establish and quantify vertical <br />groundwater gradients between the Echo Park Formation and the underlying Precambrian basement and <br />overlying aquifers (Tallahassee Creek Formation, Thirtynine Mile Andesite, and alluvium). <br />Further groundwater characterization of the shallow alluvial aquifer may be necessary upgradient and <br />downgradient of specific facilities. The MW -F location (Figure 12) shows a potential location for wells <br />monitoring mine facilities. The shallow alluvial wells will be sited after the facility locations are selected, <br />and the wells may be drilled in conjunction with geotechnical characterization for mine facilities. <br />As shown in Table 13, multiple wells will be drilled at each site. Because of the proposed depths, separate <br />wells will be drilled rather than dual or triple completions in a single boring. The deeper well in each <br />cluster will be drilled first, if possible. If possible, completed wells will be instrumented with transducers <br />while subsequent wells are drilled, to determine whether the aquifer responds during drilling at various <br />depths. Well drilling and completion specifications are provided in Section 4.2 and Appendix E. <br />4 The well site names (MW -F, MW -DG, and MW -UG) are temporary; after drilling, monitoring wells will be assigned final <br />permanent names, which include MW, the section number, and a sequential well ID number. <br />4153A.140129 Whetstone Associates <br />