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• Water quality standards and effluent limitations at the operation is regulated by the U.S. <br />Environmental Protection Agency, the Colorado Department of Health under the terms of <br />the NPDES Permit and by the Colorado Division of Minerals and Geology. The applicable <br />effluent limitations have been met by using treatment methods which include prompt <br />revegetation, stabilizing backfill, appro~dtnate sediment retention, use of contour furrows, <br />sediment ponds and if necessary, strategically placed energy dissipators, such as riprap, check <br />dams, mulches, filters, and dugouts. As indicated in Exhibit 6, revegetation and sediment <br />control measures have controlled runoff and sediment transport to a level which warranted <br />removal of the sediment control system and suspension of the hydrologic monitoring <br />program (TR-10). <br />The chemical characteristics of the overburden is presented under Section 2.04.6. The <br />results of this testing is presented in Table 3, Overburden Analysis. Because of the SAR <br />values inherent in the overburden found in the mine plan area, a minimum total of four feet <br />of iow SAR overburden, subsoil and topsoil was placed upon the regraded backfilled areas. <br />Due to the small area mined at the site, no impacts to groundwater recharge or quality were <br />detected. Groundwater recharge to the aquifer in the mine area occurs in the cedar-covered <br />hills to the west. No water users were affected by the mining which occurred on the site. <br />Protection of Public Parks and Historic Places <br />• There are no public parks or historic places within the permit or adjacent areas of the mine. <br />Surface Mining Near Underground Mining <br />There will be no surface mining near the underground mines located adjacent to the area <br />previously mined. <br />The remaining portions of this part of 2.05.6 do not apply in that the CCM#1 is a surface <br />mining operation. <br /> <br />2.05-9 <br />