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• TAB 24 <br />AIR pUALI TV CONTROL PLAN <br />Air Quality Control Plan <br />The following outlines the measures Peabody Coal Company will employ to control dust at <br />the Seneca II-W mine site. The control measures will be conducted throughout the life of <br />the mine in accordance with the terms and conditions set forth in the Emission Permit <br />issued by the Colorado Department of Health (CDOH). <br />Coal produced at Seneca II-W will be loaded into 50-ton capacity haul trucks and <br />transported directly to the Hayden Power Plant. No coal crushing, handling or storage <br />facilities are located at the mine site. <br />Haul roads will be watered to control dust emissions. If necessary, chemical suppressants <br />will be used. Further, haul truck speeds on unpaved haul roads will be kept low. Speeds <br />• of unloaded trucks will average approximately 30 miles per hour. The speeds of loaded <br />haul trucks traveling on the unpaved roads will be considerably less. These speeds are <br />expected to be less than approximately 20 miles per hour, depending upon road grades. <br />The unpaved haul roads will be regularly graded in order to maintain a surface free of <br />loose material and potholes. All of the above control measures will effectively reduce <br />the dust emission from haul roads to minimal rates. <br />Areas that have been mined will be graded, topsoiled and revegetated in accordance with <br />the approved reclamation plan. The practice outlined in the reclamation plan will result <br />in prompt and effective revegeta tion which will minimize the emission of dust on exposed <br />surfaces due to wind erosion. This condition will be maintained by restricting all but <br />essential vehicular traffic to haul roads. <br />Sequential detonation of blasting charges will be utilized at Seneca II-W on the coal and <br />overburden. Authorities maintain that this practice reduces the emission of fugitive dust <br />(Colorado Air Pollution Control Regulation 111-II (D)(9)(b)(2)), although data to <br />• substantiate this assertion has not been identified and no estimate of its effectiveness <br />is known. The use of sequential blasting will continue throughout the proposed life of <br />mining activities. <br />1 <br />