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2. The Division proposes to grant small area exemptions from the use of <br /> sediment ponds, due to the limited size of the area, the fact that ponds and <br /> treatment facilities are not necessary for the drainage to meet the effluent <br /> limitations of Rule 4.05.2 and applicable State and Federal water quality <br /> standards for receiving streams, and due to the fact that no mixing of <br /> surface drainage with a discharge from underground workings will occur. <br /> The small areas to be exempted are located at the Sylvester Gulch fan site, <br /> the lay-down area between FW-1 and MB-1, an area located downstream <br /> from the MB-5 inlet, the 1.2 million gallon water tank, the Lone Pine <br /> substation, and the Lone Pine ventilation fan and associated facilities <br /> (4.05.2(3)(b)(i)). <br /> B. Diversions and Conveyance of Overland Flow <br /> 1. Sediment control ditches have been designed and constructed in compliance <br /> with Rule 4.05.3. Locations are shown on Map 54, and designs can be <br /> found in Exhibit 66. A summary of the designs can be found on Table 44 <br /> in Exhibit 66 of the permit document (4.05.3(2)). <br /> C. Stream Channel Diversions <br /> 1. The West Elk Mine does not propose any stream channel diversions; <br /> therefore, this section is not applicable. <br /> D. Sedimentation Ponds <br /> 1. Mountain Coal Company has constructed five sediment ponds and one <br /> freshwater pond (FW-1). The ponds have been designed, constructed and <br /> maintained in accordance with the requirements of 4.05.6 and 4.05.9. The <br /> location of these ponds can be found on Map 54. The designs of the ponds <br /> can be found in Exhibit 66. The ponds are located as near as practical to <br /> the disturbed area and are not located within perennial streams according to <br /> 4.05.6(1)(6). <br /> E. Acid-forming and Toxic-forming Spoil <br /> 1. Underground development waste from underground workings at the West <br /> Elk Mine is handled as coal mine waste and placed on the Lower Refuse <br /> Disposal Area. No acid-forming or toxic-forming materials are present in <br /> the spoil in quantities significant enough to affect ground water quality. <br /> Therefore, special handling is not required for these materials (4.05.8(3)). <br /> F. Impoundments <br /> 1. Refer to the section regarding sediment ponds (4.05.9). <br /> 24 <br />