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<br />• <br />S(~~ <br />III IIIIIIIIIIIII III <br />999 <br />Doc Date:12/11/2001 <br />SECTION 4.0 Regraded Spoil Laboratory Results <br />Trapper's approved Mining and Reclamation Permit (C-81-010) specifies annual sampling of recontoured <br />spoils in the Ashmore and Flintlock pit areas. Section 2.7.2 of pennit C-81-010 addresses the specifics of <br />these requirements. <br />Map 3 (Sheet 2) illustrates the Ashmore Pit and Flintlock Pit areas recontoured in 1999 and outlines the <br />spoil areas that were mapped and sampled. <br />4.1 Methods <br />The 1999 mapping units were determined by the visual and textural difference of the surface spoils. Each <br />sample of spoil was a composite from various areas within each mapping unit, from at least sons-foot <br />depth of material. Nineteen composite samples were taken in 1999. Map 3 (Sheet 2) presents the spoil <br />sample locations. <br />4.2 Results <br />Spoil samples were analyzed for the parameters outlined in Table 2.7.2a of Trappers mining and recla- <br />mation permit. The ACZ Laboratory performed the 1999 laboratory analysis. The lab results are <br />presented on Table 4-1. Table 4-2 shows the suitability ratings of the 1999 samples as compared to the <br />suitability ranges presented in permit Table 2.7-2a. Further comparison of the 1999 samples to historical <br />topsoil and spoil samples is presented in Table 4-3. <br />4.3 Dlscusslon and Recommendations <br />The purpose of annual spoil sampling and analysis is to demonstrate that the recontoured surtace spoil <br />layer has acceptable physical and chemical properties to promote plant growth and successful reclama- <br />tion. The 1999 data again show no problems and continues to indicate that Trapper is accomplishing this <br />goal. With replacement of suitable topsoil, all rewntoured spoils should provide an excellent medium for <br />plant growth for any desirable postmine land use. <br />BDN 3/00 <br />IDMG~99REPT4] <br />u <br />