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Chavers Mining Resource <br /> DRMS Permit No.M-2015-030 <br /> Amendment No.2(AM-02) <br /> January 2024 <br /> Page 10 <br /> (c) A signed affidavit certifying that the material is clean and inert, as defined by <br /> Rule 1.1(22) is provided as Attachment 1 of this document. <br /> (d) Backfill of material generated off-site will commence in 2022/2023 and end at <br /> the completion of Reclamation Phase 1 (estimated 2035 - see Section <br /> 6.4.5(2)(e)). <br /> (e) The backfilled Site will result in a post-mining configuration that is <br /> compatible with the post-mining land use (i.e.,rangeland) being requested for <br /> approval by this Amendment No. 2 (AM-02). <br /> (f) The material will be placed and spread in 1-to-2-foot lifts using haul trucks, <br /> bulldozers, excavators, and/or loaders. Compaction will take place during the <br /> filling process, as haul trucks and heavy equipment traverse over the fill. <br /> (10) All mined material not compatible for off-site use (e.g., fines)will be backfilled to <br /> prevent any release of unauthorized fine material to the surface drainage system. <br /> (11) No unauthorized release of pollutants to groundwater will occur from materials <br /> mined, handled, or used as backfill within the permit area. No toxic or acid producing <br /> materials are used in the mining process. <br /> 3.1.6 Water — General Requirements: ASCI will minimize disturbances to the prevailing <br /> hydrologic balance and water quality of systems(surface and groundwater)both during <br /> and after mining and reclamation phases. <br /> (1) Hydrology and Water Quality: ASCI will continue to comply with applicable <br /> Colorado water laws and regulations to ensure no injury occurs to existing water rights <br /> and maintain water quality standards of the Water Quality Control Commission <br /> (WQCC).ASCI will continue to maintain the appropriate permits and plans(e.g.,CDPS <br /> Discharge Permit, approved Substitute Water Supply Plans [SWSPs]) along with <br /> replacement water lease(s) sufficient to cover out-of-priority depletions throughout the <br /> mining and reclamation process.Additional details regarding hydrology&water quality <br /> are provided in the Groundwater Monitoring and Mitigation Plan(Attachment 2). <br /> (2)No earthen dams will need to be constructed. <br /> (3) All surface areas, including spoil piles, will be stabilized to effectively control <br /> erosion using appropriate erosion control measures. <br /> 3.1.7 Groundwater—Specific Requirements: <br /> (1) The Site is located within Classified Area: City of Fort Lupton Wellfield, Weld <br /> County (WQCC Regulation No. 42). Water quality standards applicable to the Site are <br /> presented in the Groundwater Monitoring and Mitigation Plan (Attachment 2). <br /> (2)Not Applicable -The Site is located within a classified area. <br /> (3)Not Applicable - The Site is located within classified area. <br />