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NEWMONT <br /> GOLDCORP <br /> 4 GROUNDWATER GEOCHEMISTRY <br /> The groundwater hydrology and geochemistry of the District have been investigated since 1906 <br /> (Lindgren and Ransome, 1906). Detailed investigations of the groundwater hydrology and <br /> geochemistry have been conducted for permitting of Cresson Project extensions for Amendment <br /> 8 (Adrian Brown Consultants, 1998; Shepherd Miller Inc., 1998), MLE - Amendment 9, (Adrian <br /> Brown Consultants, 2008), and MLE2 - Amendment 10, (Adrian Brown Consultants, 2010), and <br /> Amendment 11 (Adrian Brown Consultants, 2015). The information provided as part of <br /> Amendment 11 remains current. The most recent update to the geochemical model was provided <br /> in Appendix 1 in Volume 11 of Amendment 11 (December 2015). <br /> The activities associated with Amendment 13 are not expected to affect the geochemistry of the <br /> site. Prior studies have evaluated the acid-generating potential and acid-neutralizing potential of <br /> sulfur oxidation of the rock mass within the District. Geochemical evaluations have been <br /> conducted on rock samples from drilling throughout the Cresson Project, from blast hole data, <br /> and from rock removed from the back and ribs of the Chicago Tunnel. These data are considered <br /> representative of the materials to be mined, stored at the surface or backfilled. The geochemical <br /> evaluations also have included an analysis of the reasonable sources, probable fate, and <br /> transport mechanisms of metal and acid-producing minerals that may be mobilized during <br /> development and reclamation of the Cresson Project. <br /> Using the hydrologic and geochemical information developed for the District, an evaluation was <br /> conducted of the fate and transport of water infiltrating to the subsurface through mines, mine <br /> backfill, and over burden storage areas (OSAs). The results of the analysis were verified by <br /> checking against the observed behavior of the hydraulics and chemistry of the diatreme since <br /> Cresson Project surface mining began in 1993, using the measured vertical hydraulic gradients <br /> in and near the diatreme, and the flow rate and chemistry of the regional groundwater exiting the <br /> Carlton Tunnel portal. The results of the analysis indicate that no deleterious change in the <br /> average regional groundwater quality from the District will occur due to past, current or proposed <br /> operations. <br /> Cripple Creek&Victor Gold Mining Company Exhibit G <br /> Cresson Project Amendment 13 <br /> 14 <br />