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Response 1: <br /> In May 2018, CC&V and DRMS discussed the proposed location of the ECOSA <br /> monitoring well. The rationale for the discussion was to determine a site that will <br /> intercept fluid which may be infiltrating into the alluvium/coRuvium and migrating <br /> horizontally into Grassy Valley from the seep at the ECOSA facility. <br /> The initial proposed well placement to monitor the ECOSA seep was deemed to be <br /> outside of the ECOSA seep fluid potential flow path (too far north). In a May 14, <br /> 2018 conversation between CC&V and DRMS, it was determined after reviewing <br /> topographic data that moving the well to the southeast would better position the <br /> well to intercept any flow from the seep. Additionally, adjacent property <br /> boundaries, the Grassy Valley water pipeline, winter access and previous flow were <br /> considered to ensure that the well location was appropriate. <br /> To provide a better spatial understanding during the May 23, 2018 DRMS site visit, <br /> parcel boundary, Grassy Valley pipeline, and the updated monitoring well location <br /> were marked. The well location was also positioned closer to the existing road to <br /> facilitate access during the winter months in case of large snow events. <br /> Figure 6 depicts the initial proposed well location, the accepted well location as well <br /> as the water line position. <br /> Comment 2: Figure 4 <br /> The plan on page 2 states "the monitoring wells will be drilled to bedrock" implying they <br /> will be screened in the alluvium. However, Figure 4 (GVMW-25 Cross Section)shows <br /> the monitoring wells extending well into the Diatreme (Cripple Creek Breccia) bedrock. <br /> Please explain this discrepancy and clarity what formation(s) will be screened. If the <br /> deeper completion depth is shown simply to make it easier to see on the figure,please <br /> include an inset figure using a larger scale to shown the intent is to complete the well in <br /> the shallow alluvium/colluvium. <br /> Response 2: <br /> The text on page 2 is accurate and the proposed well will be drilled to bedrock and <br /> screened within the alluvium/coUuvium. The figure presented in the technical <br /> revision submission provided an overview in an effort to demonstrate the surface <br /> location of the monitoring well, not the depth. Please see attached Figure 42 which <br /> depicts a zoomed in view of monitoring well GVMW-25 drilled to bedrock. <br />