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Water Information <br />Exhibit G <br />Colorado Division of Water Resources. The production well will also serve as a <br />groundwater monitoring point. <br />The well locations were selected based on the geology and known fractures that may <br />contain water in areas that may be in close proximity to a water table that is believed to <br />coincide with the La Plata River. One monitoring well will be located near the historic <br />Idaho Mill building and the other will be drilled on the May Day No. 2 mine bench <br />(Figure G -1). The production well will be completed adjacent to the May Day No. 1 <br />bench (see Figure G -1). Wells will be designed, drilled, and completed to a depth to first <br />water or to a depth not to exceed 300 feet below the elevation of the La Plata River. <br />Each well will be installed (Attachment G -2), developed (Attachment G -3), tested <br />(Attachment G -4), and sampled (Attachment G -5) (Section 3.1.7(7)). Groundwater <br />samples will be collected on a quarterly basis, preserved and sent to an approved <br />laboratory. Surface and groundwater field and laboratory analytes will be as prescribed <br />and approved by DRMS (Attachment U -4). <br />Point of Compliance (Section 3.1.7(6)) <br />The point of compliance for groundwater will be the monitoring well located on the May <br />Day No. 2 bench (Figure G -1), which appears to be the closest accessible location down <br />gradient of the active mine operation (May Day No. 1). Potential sources of <br />contamination that would be monitored at this point of compliance include underground <br />tailings disposal site(s) and potential exposure of sulfide minerals during mining (Rule <br />3.1.7(7)(b)(vi)). The point of compliance for surface water will be located down gradient <br />of the mine site and located adjacent to La Plata River. <br />6.4.7(2) Affected Surface /Groundwater <br />(a) Features and Drainage <br />(i) Map <br />The surface water bodies within and adjacent to the permit boundaries are <br />presented in FigureG -1. <br />ii) Runoff Plan <br />Baseline mine site surface water drainage basin delineation is illustrated <br />on Attachment U -3, Figure U -1. Detailed surface water flow <br />characteristics for the 2, 10, 25 and 100 year storm peak flows and <br />discharge flow velocities for the mine site and associated structures are <br />Wildcat Mining Corporation <br />May Day Idaho Mine Complex — 112d Permit Application <br />Revised August, 2011 <br />Exhibit G — Rule 6.4.7 <br />Page 2 of 6 <br />