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Conclusions. Overburden characteristics at the Seneca II-W Mine reflect the variable depositional • <br />environments of the coal-bearing strata of the Williams Fork Formation. Although lateral and vertical <br />variability exist, certain distinct physiochemical differences are apparent between some of the core <br />holes, especially for the parameters pH, saturation percent, conductivity, sulfate, nitrate-nitrogen, sand <br />content, clay content, and manganese. As discussed in the Mixing and Mitigation of Unsuitable <br />Overburden section and Tab 21, Minesoil Reconstruction, none of these parameters will impact overall <br />spoil suitability. In most instances, avoidance and typical overburden handling will effectively blend, <br />dilute, bury, and mitigate potentially inimical zones as documented in Appendix 6-5. <br />SCC will continue to sample all graded spoil on the 500-foot grid to determine spoil/subsoil suitability <br />prior to topsoil replacement. Any unsuitable spoil encountered will be handled according to the <br />"Unsuitable Spoil Mitigation Plan" described in Tab 21, Minesoil Reconstruction. Typical overburden <br />handling and reclamation monitoring will effectively mitigate any unsuitable or marginally suitable zones. <br />The sampling plan and mitigative measures are discussed in further detail in Tab 21, Minesoil <br />Reconstruction. <br />Coal Quality. Table 6-8, Coal Seam Analysis, summarizes the quality of the Lennox, Wadge, Sage Creek <br />and Wolf Creek coal seams of the Seneca II-W Mine. Specific analysis for the mineral marcasite was • <br />deemed unnecessary as marcasite content is included as part of the total sulfur (pyritic) content. <br />• <br />TR-50 40 Revised 07/05 <br />