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will be on 25 ft centers. This background survey will establish the current average surface <br />radioactivity of the area. <br />As part of the reclamation of the temporary ore stockpile and loading area, Nuvemco will over - <br />excavate the surface 6 to 18 inches to remove any anomalous and residual radioactive materials, <br />placing the removed material back into the mine. After the area is backfilled and re- graded to <br />approximate the contours shown on Map F -1, the topsoil will be redistributed and another <br />comparable radiometric survey will be conducted to assure a return to background radioactivity <br />levels. <br />(6) Please clam the length of portal to be collapsed and methods of compaction to ensure <br />post reclamation stability. Please provide details and design criteria far the closure of all vent <br />and emergency escape ways. <br />As described above in 3.1.5 (2), the current reclamation plan does not require collapse of the <br />portal, but closure of the steel gate and backfilling and grading across the portal area. <br />The vent holes are shafts approximately 5 feet by 5 feet and are constructed (or to be constructed <br />in the case of potential new vents) with timbers at the top supporting locking steel grates <br />covering the entrance, which may or may not include an electric fan. The timbers will be <br />removed down to a depth of 4 feet below ground level, and then timbers will be placed adjacent <br />and completely across the entire shaft. The top of the vent shaft hole will then be backfilled to <br />the surface. Stockpiled soil will be placed above the reclaimed vent shaft and re- seeded. The <br />fence will be removed as soon as vegetation is reestablished and DRMS approves. <br />(7) Exhibit F does not show final grade and topography to address this subparagraph. <br />Map F -1, Legal Reclamation Plan has been modified to show where the buried portal area is and <br />final grade of reclaimed mine site. <br />Rule 3.1.9 (1), Topsoil. <br />(1) Please confirm that any topsoil left in place for more than 180 days or one growing season <br />will he protected from wind and water erosion with the temporary seed cover proposed in the <br />reclamation plan. <br />All topsoil stockpiles will be managed with Best Management Practices (BMP) including <br />seeding to minimize erosion. Small topsoil stockpiles will be secured near vent holes and <br />sedimentation traps, with larger previously described stockpiles near the waste rock dump and <br />ore loading areas. <br />(2) Please clarify what will be done with woody vegetation if disturbed. <br />Prior to the expansion of the waste rock dump, the vegetation will be stripped and the topsoil <br />removed and stockpiled as shown on Maps C -5 and C -6. Downed trees will be placed in a <br />E:j <br />