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• fuel storage installation consists of a compacted earth pad, with either <br />concrete piers or pads for the tank installations. The entire pad area <br />is surrounded by a concrete containment structure with the containment <br />area designed to provide sufficient capacity to capture and retain the <br />entire volume of the liquid storage tanks. The fuel storage and fueling <br />area are marked with appropriate signs prohibiting smoking and noting the <br />flammable nature of the stored materials. In addition, immediately <br />adjacent to the fueling station, EFCI maintains required fire control <br />equipment. <br />The fuel storage and fueling station have been designed to require minimal <br />maintenance. EFCI does however conduct periodic inspections to verify the <br />structural integrity of storage tanks, check for any leaks in tanks or <br />associate piping, and identify any fuel spills or damage to containment <br />structures. If necessary, upon identification of any problem EFCI will <br />take immediate action to recover any significant quantities of spilled <br />• fuel, repair any leaks in storage tanks or piping, and repair any <br />significant erosion of the containment structure. <br />Upon completion of all mining activities, EFCI will remove fuel storage <br />tanks from the site, recover and properly dispose of any contaminated soil <br />materials, reduce and grade containment berms to blend with surrounding <br />areas, and topsoil and revegetate associated disturbance areas. <br />Rock Dust Storage and Feed Svstem. In late 1987, EFCI applied for and <br />obtained approval of a minor revision for installation of a rock dust <br />storage tank facility. This facility, located west of the coal refuse <br />stockpile as shown on the Mine Surface Facilities Map, (Map 18), consists <br />of a 140 ton storage tank mounted on concrete footers and connected to a <br />vertical borehole. The borehole allows direct transfer of rock dust to <br />underground working areas. The rock dust tank installation also includes <br />a short access road and graveled pad to provide access for tanker trucks <br />to deliver and unload rock dust. There is also a short power transmission <br />. line connected to the mine power system to provide power for a compressor, <br />electrically actuated valves, and a bin level monitoring system. <br />2.05.3-54 <br />