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iii iiiiiiiiuiiiiii <br />~~~~ <br />_ SECTION 4.0 Regraded Spoil Laboratory Results Doc Date:12H712oo1 <br />• <br />Trapper's approved Mining and Reclamation Permit (C-81-010), specifies awual sampling of recontoured spoils <br />in the Ashmore and Flintlock pit azeas. Section 2.7.2 of permit C-81-0]0 addresses the specifics of these <br />requirements. <br />Map 4-1 illustrates [he Ashmore pit area recontoured in 1994 and the spoils that were mapped and sampled. <br />4.1 Methods <br />The 1994 mapping units were determined by the visual and textural difference of the surface spoils. Each sample <br />of spoil was a composite from various azeas within each mapping unit, from at least cone-foot depth of material. <br />Eleven composite samples were taken in 1994. Again Map 4-1 presents these mapping units along with the <br />sample number, texture and year sampled. <br />4.2 Results <br />Spoil samples were analyzed for the pazameters outlined in Table 2.7.2a of Trapper's mining and reclamation <br />permit. The 1994 laboratory analysis was performed by the Colorado State University Soil Testing laboratory. <br />The lab results are presented on Table 4-1. Table 4-2 shows the suitability ratings of the 1994 samples as <br />compazed to the suitability ranges presented in permit Table 2.7-2a. Further comparison of the 1994 samples to <br />historical topsoil and spoil samples aze 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 layer has <br />acceptable physical and chemical properties to promote plant growth and successful reclamation. The 1994 data <br />again shows no problems and continues to indicate that Trapper is accomplishing this goal. With replacement of <br />suitable topsoil, all recontoured spoils should provide an excellent medium for plant growth for any desirable <br />postmine land use. <br />LWH/jsb 1/95 <br />[DMG\94REPT4] <br />• <br />