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The rock dust storage and handling system is totally enclosed, with <br />• pneumatic transfer from tanker trucks to the storage tank, and <br />gravity flow from the tank through the borehole supply casing. <br />Drainage from storage tank areas is controlled by berms paralleling <br />the down-gradient edge of the pad, which route any runoff through <br />a silt fence at thte low point of the pond area. <br />The rock dust facility has been designed to require minimal <br />maintenance. EFCI will periodically inspect this area to verify <br />the structural integrity of the storage tank and ensure that <br />surface drainage is effectively controlled. If indicated EFCI will <br />make appropriate repairs to the rock dust handling system and <br />associated drainage structures. <br />Upon completion of all mining and related activities the rock dust <br />storage tank and associated equipment will be removed from the <br />site, the borehole will be sealed, gravel surfacing materials will <br />be removed and disposed of, the powerline will be removed, and <br />associated disturbance areas will be regraded, topsoiled, and <br />• revegetated. <br />Explosives Bunker. EFCI maintains a small explosives bunker in the <br />vicinity of the abandoned and reclaimed Newlin Creek Mine. This <br />bunker is utilized for storage of explosives supplies utilized on <br />an occasional basis to fragment unusually hard, resistant, rock <br />units underground during mine development or construction of <br />ventilation overcasts or to fragment coal when a lump product may <br />be required. The explosives storage are consists of a graveled <br />storage pad with access road and two (2) standard metal and wood <br />explosives magazines utilized to store explosive supplies. <br />Construction and location of the explosives bunker are consistent <br />with applicable regulations for storage of explosives materials. <br />EFCI has placed appropriate warning signs in this area, maintains <br />appropriate access security measures as described in the <br />regulations, and keeps the bunker area free of all trash and debris <br />which might be potential fire hazards. Upon completion of mining <br />and related activities, the explosives magazines will be removed, <br />• gravel surfacing will be recovered and disposed of, and the area <br />will be regraded and revegetated. <br />06/08/95 ii:s~~, kap 2.05.3-55 Revised June 1995 <br />