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10. The existing modular home that is on the property does have a septic system. When mining has progressed to the point that the gravel around the area of the house shall be extracted, the septic system will be abandoned and removed. The following procedure to remove the septic system is recommended, according to Steve DeFeyter with the Mesa County Health Department and Greg Pink, who has authority in health issues in Montrose County in the absence oP a health agency. Use of the system will cease at least three months prior to the removal of the system. The septic tank will be pumped out by a company that is in the business of pumping septic tanks. Mr. Defeyter states that the pathogenic bacteria and other organisms that could be considered to be potentially harmful will be contained in the sludge in the septic tank itself and as long as customary precautions are taken, no unusual threat should exist. Apparently most pathogenic organisms are not able to live long outside of the human intestinal tract and are deemed to be of minimal threat under normal circumstances. After the tank is thoroughly pumped, it will be removed from the ground, demolished and hauled to an appropriate landfill. The 3oints of pipe that are a part of the system will also be removed and hauled away. The water that exits the septic tank is considered to be a treated effluent discharge and is relatively void of pathogenic bacteria and harmful viruses. It will be prudent to exercise reasonable caution when the area that represents the plume of the leach field is affected. Protective equipment such as impervious gloves and respiratory protection should be used when directly working in the leach field area. Additional precautions such as no smoking, eating or drinking while working in the immediate area should be observed. The gravel material that is to be removed from the leach field area will be crushed and used in the production of asphalt, which will expose any living organisms to extreme temperatures that will kill them. 11. The diesel Puel tank that is integral to the asphalt plant will also be used as a fuel supply tank for the mobile equipment that is on site. The mobile equipment will be fueled inside the secondary containment area. The spill prevention and cleanup contingency plan that will be used for the asphalt plant will pertain also to equipment fueling. I trust that the concerns that you have stated regarding the Colona Gravel Pit, File No.M-94-005 have been addressed to your satisfaction. Sincerely, U ITED COMPANIES OF MESA COUNTY, INC. ~~ ~. ~~G~ Paul E. McGehee Resource Manager Enclosures 4 United Companies of Mesa County, lnc.