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RULE 4 PERFORMANCE STANDARDS <br />r 4.11.1 Burning <br />(Not Applicable) <br />4.11.2 Burned Waste Utilization <br />(Not Applicable) <br />4.11.3 Return to Underground Workings <br />(Not Applicable) <br />4.11.4 Disposal of Noncoal Waste <br />Noncoal, nonhazardous solid waste, such as garbage, used tires, etc., is stored in a controlled <br />manner around the operation in various waste receptacles and waste locations. Periodically the <br />waste is disposed of in the backfill area of the pit and covered with a minimum of two feet of <br />overburden material. No waste is allowed on the bottom of the backfill area or below the <br />anticipated groundwater level of backfilled areas. <br />Facility structures including but not limited to concrete foundation will be demolished in-place <br />and covered with a minimum of six feet of suitable material. The area will be regraded to blend <br />with the surrounding topography followed by topsoil and seeding as described in the reclamation <br />plan. All demolition materials related to sedimentation ponds will be placed within the ponds a <br />covered with a minimum of six feet of suitable material or transported to the pit area during the <br />reclamation process. Noncoal, nonhazardous solid waste is regulated under the Moffat County <br />Special Use permit identified in Section 2.03.10. <br />Nonhazardous used oil and grease, flammable liquids, etc. are stored in a tankfarm facility located <br />near the shop facilities. <br />Colowyo's status as a conditionally exempt small quantity generator of hazardous materials <br />essentially indicates that Colowyo generates negligible amounts of hazardous waste. The limited <br />amount of hazardous waste is handled according to applicable State and Federal requirements. <br />Waste water from toilets, sinks, and showers will be disposed of by means of septic tanks, <br />underground leach fields and evaporation ponds. <br />Portable self-contained toilets will be located around the operation. These portable toilets will be <br />serviced periodically and the waste hauled from the mine for disposal. <br />4.11.5 Dams and Embankments <br />(Not Applicable) <br />Rule 4 Performance Standards 4-37 Revision Date: 5/25/18 <br />Revision No.: RN -07 <br />