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performance of snore life-forms was maximized by replacing only 6 inches <br />of topsoil. <br />Proposed Topsail Salvage Techniques <br />Peabody Coal Company will maintain and periodically review the existing <br />quality control program used to evaluate topsoiling activities at Seneca <br />II Mine. The following techniques will be used to monitor the <br />topsoiling and final spoil grading activities at Seneca II Mine. <br />I. The upper three feet of regraded spoil in the Wolf Creek mining <br />area will be sampled on a 300 foot grid pattern prior co topsoil <br />replacement to ensure a suitable root growth medium is provided. <br />The samples will at a minimum be analyzed for pH, acid base <br />potential, and salinity. <br />2. Prior to topsoil replacement, regraded spoil will be visually <br />inspected far compaction, possible root growth problems and the <br />potential for slippage at the topsoil/spoil interface. If problems <br />are evident the regraded spoil will be mechanically loosened by <br />ripping or chisel plowing. Ripping is often performed when thin <br />topsoil replacement depths are utilized and where shrubs and trees <br />are included in the postmine revegetation species list (Redente and <br />Hargis, 1985; Josiah, 1986). <br />3. The maximum soil salvage depth will continue to be evaluated on <br />site by qualified specialists using field observation tests which <br />primarily include clay content, rock fragment content and depth to <br />bedrock. Periodic field inspections will be ~r~ade by Peabody Coal <br />Company's soil scientist. Soil samples will be collectea as <br />necessary to correlate field procedures with laboratory data. <br />4. When feasible, direct haul topsoil will be two lifted to promote <br />the natural regeneration of existing revegetation species (Wendt <br />and Pfannenstiel, 1984). <br />9-40 revised 8/17/90 <br />