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7. Groundwater <br /> Groundwater is located approximately five feet below the surface at the Evans site. This was <br /> determined from wells installed onsite. Table G-4 outlines all wells within 600' of the permit <br /> area. These well locations are also shown on Map C-2. Groundwater quality data was gathered <br /> in advance of mining. This data and discussion of it can be seen in the Groundwater Monitoring <br /> Plan in Appendix G-2. <br /> Table G-4. Wells Within 600' of Permit Area <br /> Applicant/Well ID Permit ID Total Purpose Distance from <br /> Depth nearest mining <br /> (feet) area(ft) <br /> ASPHALT SPECIALTIES CO INC 332478- 38 MONITORING& <100 FT <br /> SAMPLING <br /> ASPHALT SPECIALTIES CO INC 332479- 41 MONITORING& <100 FT <br /> SAMPLING <br /> ASPHALT SPECIALTIES CO INC 332484- 42 MONITORING& <100 FT <br /> SAMPLING <br /> ASPHALT SPECIALTIES CO INC 332483- 40 MONITORING& <100 FT <br /> SAMPLING <br /> ASPHALT SPECIALTIES CO INC 332482- 37 MONITORING& <100 FT <br /> SAMPLING <br /> ASPHALT SPECIALTIES CO INC 332481- 34 MONITORING& <100 FT <br /> SAMPLING <br /> ASPHALT SPECIALTIES CO IN 332480- 43 MONITORING& <100 FT <br /> SAMPLING <br /> SORIN NATURAL RESOURCES 55499-MH 12 MONITORING& <400 FT <br /> PARTNERS LLC SAMPLING <br /> SORIN NATURAL RESOURCES 55498-MH 12 MONITORING& <100 FT <br /> PARTNERS LLC SAMPLING <br /> GURNEY,NORMAN 103102- 30 DOMESTIC >600 FT <br /> HERNANDEZ,MARTIN 299707- 40 DOMESTIC >600 FT <br /> CONOVER JR,DAVID 283674- 21 IRRIGATION STOCK —150 FT <br /> 7.1 . Groundwater — Mining <br /> • <br /> Prior to mining, slurry walls will be installed around the perimeter of the pit to prevent <br /> groundwater flow into the mining area. Following slurry wall installation, the operator will mine <br /> out the pod by dewatering it via the approved CDPHE discharge point. Pumping to conduct this <br /> dewatering will take place during the initial mining and then pumping will cease. Stormwater <br /> runoff that is collected may be pumped out to protect local water rights, once sediment has <br /> settled. For this reason, the CDPHE discharge point will be maintained over the life of the mine. <br /> The pump will be located at least two feet below the active mining floor at the lowest point of the <br /> pit. It will be surrounded by a gravel filter. This configuration minimizes the risk of sediment <br /> being pumped out of the pit. <br /> Evans Mining Resource <br /> October 2024 G-5 Lewicki&Associates <br />