PERMFILE44203 - Laserfiche WebLink

Home Browse Search

of the material, and the estimated volume. At the discretion of the facility operator, the certification may also include an environmental audit of the source site prepared by a Colorado Registered Professional Engineer or a Registered Environmental Manager. 2. During the stockpiling process, the facility manager, and those individuals who operate the stockpiling equipment, will conduct constant visual analysis of the delivered material on a truck by truck basis. At a minimum, the visual evaluation will identify that the soil does not have any hydrocarbon contamination, hazardous substances, or other solid waste. 3. In the event that contaminated material is identified, all work in the immediate area will cease and a Colorado Registered Professional Engineer or a Registered Environmental Manager will be contacted by the facility operator. The listed qualified individual(s) will prepare, supervise and implement a Remediation and Disposal Plan conducted in accordance with the requirements of the governing regulatory agencies. TOPSOIL REPLACEMENT -At the end of mining, it is anticipated that 16.5 acres will need re-topsoiling. Topsoil replacement will occur with mobile equipment once all re-grading of the area disturbed by mining is complete. Topsoil will be replaced to a thickness of at least 8 inches, which is appropriate to establish vegetation communities consistent with the post mine land use. This is a quantity of 17,750 cy. As is the case with the overburden stockpiles, the segregated topsoil stockpiles will change from time to time as mining and grading locations change over the life of the operation. RE-VEGETATION -The intent of the re-vegetation is the establishment of plant communities consistent with the post-mine land use. After topsoil replacement, seed bed preparation and stabilization will be conducted and may include one of the following: ripping, disking, harrowing and/or furrowing. Continuous analysis of re-vegetation success will determine the best type of preparation that should be used. The seed mixture selected to vegetate the disturbed areas is specie consistent with the post mine land use. Seeding recommendations follow: Seeding will normally be done in the fall and/or spring when temperatures and adequate soil moisture are present. Seeding will be accomplished by either broadcasting, or by using a seed drill. If broadcasting is used, seed rates will be doubled. Due to the nature of the backfill material and topsoil found in the area, hay, straw or fiber mulch is considered to be necessary. Mulching will be accomplished with a clean weed- free straw at a rate of 2000 pounds per acre either crimped or "tackified° with a tackifier at the rate of 150 pounds per acre. "Biosol" fertilizer will be applied at a rate of at least 1000 pounds per acre. SEEDING CHART SPECIES PLS I AC.