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:• t Mr. Bill Crick October 10, 1990 Page: 2 long, 150 feet wide, and 4 feet high (as discussed in Section 4.3.6), then approximately 15,000 cubic yards of material will be required to cover the stockpile to a depth of four feet. The topsoil within the "footprint" of the proposed stockpile has been removed and stored. Given the nature of the soils and subsoil materials in this area (Nihil stony loam (Section 3.5.2)), at least two additional feet of suitable nontoxic material are available for excavation in the area of the proposed stockpile. Two feet of subsoil within the footprint of the stockpile will provide nearly 8,000 cubic yards of material. In addition to this subsoil, about 8,000 cubic yards of topsoil are available in an existing stockpile located 300 feet north of the waste pile. This topsoil stockpile was omitted from the original determination of the available topsoil for site reclamation, which proved to be sufficient. Therefore, should it be required, the 8,000 cubic yards of topsoil in the adjacent stockpile could also be used as cover for the waste pile, resulting in approximately 16,000 cubic yards of available nontoxic cover material. In the detailed plan, NCEC may propose that a demonstration be made to determine whether or not less than four feet of cover can be used, as per 4.10.4(5) and in accordance with 4.15. A detailed plan will be submitted to CMLRD within 6 months of receiving the permit revision. It is NCEC's understanding that detailed plans must be submitted and approved by the Division prior to any construction of the stockpile. This general plan will be incorporated into the tex*_ of the permit revision, as time permits and replacement pages provided to the Division. If you have any questions or comments, please do not hesitate to call. Sincerely, ADRIAN BROWN CONSULTANTS, INC. Michael Galloway, Seni/~ogeologist cc: E. Peter Matthies, NCEC ADRIAN BROWN CONSULTANTS, INC.