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As mentioned, Appendix I contains the report and map showing the proximity of suspect overburden core <br />holes and corresponding analysis of adjacent spoil areas. Appendix W (1989) proposed elimination of <br />spoil sampling for all other pits (Section 4.3) other than Ashmore and Flintlock pits. <br />Had spoil sampling results identified a potential problem on any reclaimed area regraded from 1987 <br />through 2000, the Division would have been be notified via the Annual Report. The criteria used to define <br />problematic spoils is described in Table 2.7-2a and in Appendix I (overburden -spoil comparison report). <br />Tables 2.7-2b and 2.7-2c give spoil suitability ratings and compare spoil and topsoil materials, <br />respectively. <br />The lithologic core sampling conducted by Stearns -Roger and Trapper Mine indicated that overburden <br />strata having poor chemical and physical properties are typically adjacent to strata having good to <br />moderate chemical and physical properties. The mixing of surface materials during spoil regrading is of <br />primary importance to ensure adequate subsoil composition. The Annual Reports from 1987 to 2000 <br />contain data demonstrating that the surface spoil layer is consistently comprised of materials exhibiting <br />acceptable physical and chemical properties. With the addition of suitable topsoil, these reclaimed spoils <br />provide a suitable medium to promote plant growth and support successful reclamation. <br />• The concentrated placement of lithologic strata containing higher than desired mineral content on the spoil <br />surface has proven to be of little concern from a reclamation standpoint as predicted in Appendix I and as <br />subsequently verified by the regraded spoil sampling program conducted at Trapper. Without exception, <br />C J <br />spoil sampling data as provided in Annual Reports from 1987 through 2000 indicates suitable spoil <br />materials predominate at Trapper as a result of the routine regrading methodologies employed. No <br />indications of problematic spoils placement were identified during the sixteen -year duration of the spoil <br />sampling program conducted at Trapper. In light of this historical data, Trapper obtained approval to <br />discontinue the spoil sampling program in its entirety in the fall of 2001. <br />2-361b <br />Revision: 7;e-89 <br />Approved: r1 ry o <br />