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Doc Date:12/11/2001 <br />iiiiiiiiiiiniiiiii1 --~ <br />sss <br />• SECTION 4.0 Regraded Spoil Laboratory Results <br />Trapper's approved Mining and Reclamation Permit (C-81-010), specifies annual sampling of recon- <br />toured spoils in the Ashmore and Flintlock pit areas. Section 2.7.2 of permit C-81-010 addresses the <br />specifics of these requirements. <br />Map 4-1 illustrates the Ashmore pit area recontoured in 1995 and the spoils that were mapped and sam- <br />pled. <br />4.1 Methods <br />The 1995 mapping units were determined by the visual and textural difference of the surface spoils. <br />Each sample of spoil was a composite from various areas within each mapping unit, from at least aone- <br />foot depth of material. Eleven composite samples were taken in 1995. Again Map 4-1 presents these <br />mapping units along with the sample number, texture and year sampled. <br />4.2 Results <br />Spoil samples were analyzed for the parameters outlined in Table 2.7.2a of Trapper's mining and recla- <br />mation permit. The 1995 laboratory analysis was performed by the Colorado State University Soil <br />Testing Laboratory. The tab results are presented on Table 4-1. Table 42 shows the suitability ratings <br />of the 1995 samples as compared to the suitability ranges presented in permit Table 2.7-2a. Further <br />. comparison of the 1995 samples to historical topsoil and spoil samples is presented in Table 4-3. <br />4.3 Discussion and Recommendations <br />The purpose for annual spoil sampling and analysis is to demonstrate that the recontoured surface spoil <br />layer has acceptable physical and chemical properties to promote plant growth and successful reclama- <br />tion. The 1995 data again shows no problems and continues to indicate that Trapper is accomplishing <br />this goal. Wth replacement of suitable topsoil, all recontoured spoils should provide an excellent <br />medium for plant growth for any desirable postmine land use. <br />LWH 3196 <br />[DMGl96REPT4] <br />• <br />