2012-09-06_REVISION - M2008070 (25)

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Design and Operations Plan Western Gravel E & P Waste Disposal Facility • Environmental Monitoring Plan • Financial Assurance 2.2 LOCATION RESTRICTIONS AND FACILITY STANDARDS October 24, 2011 Page 6 of 51 The proposed WGDF meets location and facility standards in accordance with Section 3.1 of Regulation 6 CCR 1007 -2 as summarized below. • Airports - The proposed facility is not located within 10,000 feet of any airport runway used by turbojet and not within 5,000 feet of any airport runway used by only piston -type aircraft. WGDF will not accept putrescible waste that could result in a bird nuisance. The property is located approximately 19 miles west of the Meeker Airport and 36 miles east of the Rangely Airport. No other airports or landing strips are located within a 5 mile radius of the site. Notification of the Federal Aviation Administration (FAA) is not necessary. • Wetlands — The proposed facility is not located in a wetland. The proposed site occupies a terrace approximately 45 feet above and approximately 205 feet south of irrigated hay meadows and wetlands associated with the White River floodplain and an irrigation ditch. Wetlands are not present within the COD. • Faults - Based upon published information reviewed, "active" faults experiencing Holocene movement are not located within 6 miles of the site. • Seismic Impact Zone - The property is considered to be in the Uinta - Elkhead seismotectonic province and is considered to be in Seismic Zone 2 (U.B.0 seismic zonation) associated with a maximum credible earthquake (MCE) potential of a 5.5 to 6.5 on the Richter Scale. The seismic zonation poses no development restrictions associated with the property. • Slope Stability — The proposed facility is located above the White River on a terrace. However; based upon conducted field reconnaissance, the area appears stable. Obvious geologic hazards or unstable areas at or near the property were not observed (e.g. flowing water). A detailed geotechnical slope stability evaluation including overall global stability of the facility under static and dynamic conditions as related to existing site conditions and the finished slope of landfill cells following final soil cover placement are discussed in Section 2.3.2.6. • Topography - Site topography maximizes protection from prevailing winds and minimizes the precipitation catchment area up- gradient of the site. The proposed facility is located on a gently sloping terrace bench immediately south of the White River and floodplain. Natural topography of the site generally slopes gently to moderately down to the north from 2 to 8 percent. The original elevation of the portion of property to be used for landfilling purposes ranges from approximately 5,820 feet above mean sea level (msl) to 5,870 feet msl. • Floodplain - The facility is not located in a 100 -year floodplain. Waste cell bases will be constructed on a terrace located at least 45 feet above the White River floodplain. Based upon Federal Emergency Management Administration (FEMA) information, the White River floodplain is located in Zone A and is a "Special flood hazard area inundated by 100 -year flood. Although base flood elevations have not been determined, the proposed facility is not within the 100 -year flood hazard area. FEMA information is provided in Appendix A. NWCC, Inc.