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Rl INCORPORATED GEORGE M.L.ROBINSON,P.G. <br /> F\\IROWENT\1 A\D FNIL�1NFERING SERVICIN <br /> S'TR AITGICAI 1) POSITIONED-11?CI INICAI I Y PRUARFI> <br /> J.ERICH RALIBER.P.E. <br /> MAY DAY IDAHO MINE COMPLEX <br /> 112(d)PERMIT-AMENDMENT <br /> EXHIBIT G <br /> Water Information <br /> 6.4.7 <br /> 6.4.7(1), 6.4.21(8); Statement of Effect on Surface Water and/or Groundwater <br /> The Operator conducted baseline monitoring activities pursuit to Section 3.1.6, 3.1.7 and <br /> 6.4 7 Attachment G-1). Procedures described within the Environmental Protection Plan <br /> (EPP) (Exhibit U—Designated Mining Operation Environmental Protection Plan)and <br /> permit commitments summarized in Exhibit M (Other Permits and Licenses)will <br /> minimize potential impacts to surface and ground water. <br /> A summary of the hydrogeologic balance for the project area is presented on Table G-1. <br /> Attachment G-1 is a discussion of site water resources including surface and groundwater <br /> quality characteristics. <br /> The Operator has characterized water quality utilizing existing sampling points and has <br /> adequately characterized the site geology for baseline purposes using historical data. Site <br /> characterization, including surface and groundwater monitoring will continue during <br /> mining and reclamation to provide information to determine and report if the <br /> environmental baseline condition has change. Four Division of Water Resources (DWR) <br /> permitted groundwater monitoring wells were drilled in 2012. Pumps were installed to <br /> obtain water quality samples and to support in the determination of the depth to ground <br /> water, flow direction and aquifer flow velocity(Section 3.1.7(b)(i)). <br /> The general flow direction coincides with the topography and stratigraphic dip. The <br /> estimated flow rate is less than 10-5 cm/sec. (Rule 6.4.21(8). A monitoring well is located <br /> near the historic Idaho Mill building, adjacent to May Day No. 1 and No. 2 mine portal, <br /> and another one located is completed in the LaPlata alluvium. The well locations were <br /> approved by CDRMS, and the locations were selected based on the geology and known <br /> geologic fractures. Wells were designed, drilled, and completed when water was first <br /> encountered. Each well was installed, developed,tested and sampled (Section 3.1.7(7)). <br /> Groundwater samples were collected, preserved,packed in ice and sent to the laboratory. <br /> May Day and Idaho Mine and Mill Application <br /> 112(d)Permit—M1081-185 <br /> 3 <br /> Revised December 28,2016 <br />