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WATER INFORMATION <br /> Rule 6.4.7 of the Mineral Rules and Regulations requires the Applicant to provide a statement <br /> and sufficient demonstration that the mining operations are not expected to directly affect <br /> surface or groundwater conditions at the facility. The facility (in support of both mining and <br /> waste disposal activities) has developed drainage studies and maintains (and operates in <br /> accordance with) surface water and groundwater management requirements that <br /> demonstrate the impacts to off-site properties are controlled by site-specific designs as well <br /> as procedures and measures mandated into the mining and waste disposal operations. <br /> The landfill facility currently maintains a site-specific Storm Water Management Plan (SWMP, <br /> Weaver Consultants Group, LLC, 2025) that addresses the management and discharge of <br /> surface waters from the landfill property. The plan is authorized by the CDPHE under permit <br /> No. COR900978 currently in effect for the landfill and affected properties (including those <br /> lands currently designated for mining in this Application). <br /> Additionally,the facility maintains a Grading, Erosion and Sediment Control Plan (GESC Plan) <br /> permit issued by Douglas County that incorporates erosion and sediment control and <br /> revegetation requirements for the facility (including areas impacted by disposal cell <br /> construction and mining). The plan will be updated to show the expanded cells and areas of <br /> future mining prior to initiating cell construction (and mining) in the expanded areas of the <br /> landfill. The GESC Plan incorporates perimeter silt fencing, check dams, and sedimentation <br /> pond capacity,as well as the specifications for revegetation of areas disturbed by landfill (and <br /> mining) activities. <br /> Both the SWMP and GESC Plan will be updated to reflect the mining activities in this <br /> application and will be maintained in the Site Operating Record for the facility. Copies of the <br /> Plans and related hydrological studies can be provided to DRMS upon request. <br /> Finally, a series of groundwater monitoring wells are installed around the boundary of the <br /> disposal facility property that are monitored on a scheduled basis to identify impacts to the <br /> groundwater from the waste disposal activities. The results of the monitoring are <br /> maintained within the Site Operating Record for the facility. <br /> Weaver Consultants Group,LLC <br /> Q: WASTE CONNECTIONS)SEDALIA�EXPANSION 2024�DRMS 112 PERMITS EXHIBIT G-WATER INFORMATION.DOCX Rev.0,11/2025 <br /> G-1 <br />