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t.~.. ~, ~~ APPENDIX C '~ ~''~ DESIGN CRITERIA Design Criteria The following design criteria have been established for this specific pro}ect and site specific conditions to meet the standards and guidelines in Appendix B. Physical and Biological Elements of the Environment Water Quality and Soils: Waste and Hazardous Material: o Storage and use of hazardous materials or explosives is not authorized. o The operator would be required to remove garbage from NFS land and dispose of this garbage in accordance with state and local regulations. o A small, portable chemical or compost toilet must be on site during operations. All human waste must be transported off NFS land and disposed of in accordance with state and local regulations. o No chemicals or additives maybe used in water used for washing minerals on site. Any fuels, antifreeze, solvents or potential hazardous materials must be properly stored to contain any leaks, and will be placed at least 100 feet away any perennial, intermittent, and ephemeral drainages. Limit refueling to designated areas. o The operator will use spill pads when pouring fuel or other petroleum products into tanks or other containers, to contain any spillage before it reaches the soil or water. o In the event of a petroleum (gas, diesel, oil, etc.) spilt or other hazardous material spill onto the soil of the claim, immediately contact the National Response Center at 1-800-424-8802 and Park/Teller County Sheriff. If hazardous substances are spilled on a federal, state or county roadway contact the Colorado State Patrol. All hazardous material spills will be disposed of according to Colorado State Hazmat disposal guidelines. o Dumping of gray water or washing must be over 100 feet away from any stream channel. Road-Use, Construction and Reclamation: Limit temporary roads, track hoe trails and other soil disturbances to the minimum feasible number, width, and total length consistent with the purpose of specific operations. The operator must monitor all temporary access roads (new and existing) for erosion that would impact riparian comdors. The operator must maintain water bars, rolling dips and lead-out ditches. Use weed-free certified straw bales in lead-out ditches as needed. Silt fencing must be installed as needed. See engineer specifications in Appendix E. If trees felled during road construction they must be placed on contour with the slope. All non-system roads utilized through mining operations must be reclaimed to near-natural conditions immediately following the completion of mining operations as follows: o Roads and related structures must be obliterated to provide adequate drainage o All culverts must be removed and a natural grade reestablished. o Obliterated roads, disrupted stream banks and stream crossings must be recontoured and revegetated. ~o When temporary roads intersect perennial streams, biodegradable, wildlife friendly erosion matting or other stabilizing material must be used to reduce sedimentation until vegetation is established. Page 38 of 49