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Page 3 <br />11/20/2015 <br />Rule 2.05.4(2)(g) A description, including appropriate cross sections and maps, prepared in <br />accordance with 2.10 of the measures to be used to seal or manage mine openings, and to plug, <br />case, or manage exploration holes, other bore holes, wells, and other openings within the <br />proposed permit area, in accordance with 4.07. <br />Wells used for dewatering and facility use were permitted by Colorado Division of Water <br />Resources. Permit Section 2.05.6(3)(b)(v) Hydrologic reclamation plan provide an overview of <br />temporary and permanent sealing of wells. <br />Rule: 2.05.6 — Mitigation of the Impacts of Mining Operations <br />This section was reviewed for protection of the hydrological balance in reference to groundwater <br />and spoil springs. This rule was found to be adequatly described 2.05.6(3). A general list is <br />provided below to the sections of the permit reviewed for compliance: <br />Quantity and quality are discussed in relation to probably hydrologic consequence. <br />4.05 Hydrologic Balance <br />4.05.2(1)-(2) — Groundwater Protection: <br />Covered in Permit section 2.05.6(3) - Protection of the hydrological balance. <br />4.05.8(1)-(3) — Acid-forming and Toxic forming Spoil: <br />Section 2.04.6(3). Storage of acid and toxic forming materials for more than 30 days has been <br />approved by the division with a findings of no material risk and feasiblity. <br />Attachment 2.04.6-3 (pH and Acid Potential of unsuitable quality) <br />Figure 2.05.6(3)-1 shows a general cross-section through NH2 mine spoil. Spoil will develop <br />once land is re -irrigated. Location of anticipated spoil spring is shown on map 2.04.7-1A. <br />Increased water infiltration will oxidize pyrite in the spoil. The resulting lowering of pH will <br />increase release of other compounds causing a higher TDS. Planned mitigation includes testing <br />of overburden in mining process and mixing with neutalizing materials. It is not expected that <br />large amounts of potential acid producting materials will be encountered. <br />4.05.11(1)-(2) Groundwater Protection <br />Covered in Permit section 2.05.6(3) - Protection of the hydrological balance. <br />4.05.12(1)-(3): Protection of Groundwater Recharge Capacity: <br />The section was adequately covered. Regional Recharge rates are provided in sections 2.04.7 <br />(page 2.04-25.1) and 2.05.6 (3) (pg 2.05-141 ). Recharge Capacity protections are discussed in <br />Permit section 2.05.6(3) - Protection of the hydrological balance. <br />