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There will not be known toxic or hazardous materials in the backfill material. The reclamation <br />will not leave high walls on the property. In addition, there will be no auger holes, excavations, <br />or shafts left on the property. <br />In general, the current mined area extends to the claystone bedrock and this relatively <br />impermeable bedrock will make the bottom of the lined depression. The area will also be <br />separated from the surrounding alluvial aquifer by a clay liner. The clay liner will be keyed into <br />the bedrock material and extend upward through the entire height of the alluvium. Design <br />specifications and quality control procedures used during construction of the clay liner will <br />ensure that the liner meets State Engineer's Office (SEO) performance standards for <br />permeability. During reclamation activities, the clay liner will be monitored for compliance with <br />the SEO performance standard. <br />Topsoil and Reve etg ation <br />Where required, topsoil will be replaced to a depth of approximately four to six inches. Topsoil <br />will be placed after backfilling and final grading of the mined area is completed. This includes <br />both the backfilled area and the lined depression. As the area is reclaimed, runoff or excess <br />water from adjacent areas will not be allowed to flow over slopes being graded and seeded. If <br />needed, berms or channels will be constructed to divert excess water and dispose of it in a safe <br />and non-erosive manner. The reclamation plan includes re-vegetating with appropriate seed <br />mixes to minimize erosion and reestablish a natural vegetative cover. Re-vegetation will occur <br />as described in the original permit. <br />If a significant invasion of noxious weeds occurs after seeding, the weeds will be mowed before <br />they can go to seed. The areas will be mowed periodically for additional control as needed. <br />Mechanical control will be used as a first priority. Chemical methods will only be used if no <br />other alternative produces acceptable results. <br />Water- General Requirement <br />To minimize the effect on the prevailing hydrologic balance, the operator shall: <br />a. Comply with all applicable Colorado water laws. <br />b. Comply with all applicable Federal and State water quality laws and regulations. <br />c. Comply with all Federal and State requirements for dredge and fill, <br />d. Re-grade and backfill all sediment and siltation structures after mining is completed. <br />Groundwater -Specific Requirements <br />The reclamation operation will not affect groundwater quality on or off the site. The operation <br />will comply with State groundwater quality standards. Due to the absence of sources of potential <br />pollutants, groundwater quality monitoring is not required in this operation. <br />The reclamation will not significantly affect the groundwater table surrounding the mine site. <br />During backfilling and creation of the liner, the existing mined area will be dewatered. The <br />Conne[! Resources Gfass Pif Operation <br />DMG !!2 PermitAmendmen! <br />Page 6 <br />