2022-01-14_PERMIT FILE - M2021067

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David King January 14,2022 Page 7 of 11 EXHIBIT G-Water Information(Rule 6.4.7): (1)If the operation is not expected to directly affect surface or groundwater systems, a statement of that expectation shall be submitted. (2)If the operation is expected to directly affect surface or groundwater systems,you shall: (a)Locate on the map(in Exhibit C)tributary water courses,wells, springs, stock water ponds,reservoirs, and ditches on the affected land and on adjacent lands where such structures may be affected by the proposed mining operations; (b)Identify all known aquifers; and (c) Submit a brief statement or plan showing how water from dewatering operations or from runoff from disturbed areas,piled material and operating surfaces will be managed to protect against pollution of either surface or groundwater(and,where applicable,control pollution in a manner that is consistent with water quality discharge permits),both during and after the operation. (3)You must provide an estimate of the project water requirements including flow rates and annual volumes for the development,mining and reclamation phases of the project. (4)You must indicate the projected amount from each of the sources of water to supply the project water requirements for the mining operation and reclamation. (5)You must affirmatively state that the Operator/Applicant has acquired (or has applied for)a National Pollutant Discharge Elimination System(NPDES)permit from the Water Quality Control Division at the Colorado Department of Health,if necessary. 18) 5 of the 6 nearby wells are shallower than the projected total depth of excavation and may be impacted by long-term dewatering at the site. In addition, the proposed reclamation plan requires the importation and backfill of a significant amount of off-site material into unlined pits in the alluvial aquifer immediately adjacent to the South Platte River. ASCI will need to provide a groundwater monitoring and mitigation plan for DRMS approval for both potential groundwater quantity and quality impacts. The plan provided should comply with the requirements of Construction Materials Rule 3.1.7. The Interim Narrative Standards(INS)from Tables 1-4 of Colorado Water Quality Control Commission Regulation 41— The Basic Standards for Groundwater will apply at this site. The plan should include, at a minimum, the following information: ■ Any available historic groundwater level and flow direction data for the proposed permit area and immediately surrounding area ■ A map showing proposed groundwater monitoring well locations and anticipated well construction details(final locations and monitoring well construction logs will be required for all wells after they are approved and installed). Groundwater Compliance Well locations for water quality monitoring should be identified. ■ Proposed measuring/sampling frequency for groundwater levels and quality