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1 <br />t operation. The current baseline data collection program is <br />designed to evaluate pre-mining water quality conditions so <br />' that these conditions can be preserved during the mining <br />operation. The results of the surface water monitoring program <br />' will be submitted each year with the annual report. Based on <br />geochemical data discussed in Exhibit D, water quality and the <br />proposed sediment control plan outlined in Section D.9, surface <br />' impacts are not expected from the mining operations. <br />' Since it is not currently anticipated that Battle <br /> Mountain will obtain any of their water supply directly from <br /> Rito Seco, there will be no injury to vested downstream water <br />' rights owners. Based on the groundwater da1.a available, <br /> including the flaw test data, it doesn't appear that the <br /> localized aquifer in the Precambrian rock is conl.ributing flow <br /> to Rito Seco locally. A proposed plan for augman~~ s~_11_ <br /> address depletions to tha ctraam svstem due to the dew_ a~i~_ <br /> operations in the mine ore zone ores, and all dEpleti~ons_will <br />' be augmented with an available water suppl.~. If stream <br /> depletions are anticipated post mining, they will be addressed <br /> through either the augmentation plan or by cons ti°ucting a cut- <br />' off wall along the south wall of the West Pit a<.. discussed in <br /> Section E.3.1. <br />1 <br /> G.5.2 Groundwater <br />' <br /> The principal groundwater in the area of the mine is the <br />' aquifer in the Precambrian rock of the ore z~me, which is <br /> perceived to be a local system. Since it is believed that this <br /> is a localized system that is recharged by fault zones and <br />' transmitted to the west through the vuggy zones and fracture <br /> system of the Precambrian rock, this aquifer will be <br />' essentially dewatered for the mining operation. Expected <br /> subsequent small inflows to the mine pit area will be collected <br />' and used in mining operations; again, with depletions being <br /> augmented by an available water supply. Depletions that are <br /> <br /> G-55 <br />1 <br />