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Any Bench 1 material below these thicknesses is considered overburden and not Dart of the <br />required thickness to be replaced for Lift A and Lift B for the prime farmland repuirement. <br />It was agreed with the NRCS in February of 2008, and in a followup phone call among Dan <br />Mathews, Greg Lewicki and the NRCS that the remaining topsoil stripping for the Morgan <br />property (prime farmland) will be as follows: <br />8.6.1 Lift A - strip to color change or 24 inches, whichever is less, where the color change <br />is defined as from dark brown, which is the normal color of the topsoil, to light tan, which is the <br />distinct color of the subsoil. This color change is consistent and has been used by the operators <br />with no confusion. It is anticipated that the stripping thickness for "Lift A" will be between 7 <br />inches and 24 inches, with an average of 16.0 inches, which is based on the experience with <br />the color change in this area, a 90% recovery of 17.8 inches, as well as the breakdown of Lift A <br />and B in the 1998/1999 soil survey. See Table 2.04.9 -5. <br />8.6.2 Lift B - Stripping thickness will be between 20 inches to 60 inches (see Table 2.04.9 -5 @ <br />90% recovery), depending on the location and suitability. It is anticipated that the actual <br />recovered average stripping thickness for Lift B will be 34 -36 inches (Table 2.04.9 -5 @ 90% <br />recovery), although there is variability due to rock cobbles and color change to near white due <br />to caliche present in the subsoil. For volume calculation purposes, it is anticipated that the <br />average stripping thickness of Lift B is 36.7 inches. The shift foreman will review the soils map <br />showing the soil sample thickness variabilities in the area to be stripped. The foreman will <br />check with the equipment operators to make sure the proper thicknesses are being followed. <br />Lift A is a combination of the following horizons where present: A, Ap, Ag, AB, AC, Bw, and Bt if <br />the pH of those horizons was less than 8.0. Lift layer B is a combination of the following <br />horizons where present: AC, Bw, and Bt if the pH of those horizons was greater than 8.0 and <br />Bk, Btk, and C horizons. Since the vast majority of the Bench 1 material has been tested to <br />meet the suitability criteria and since some of this material will be needed to provide a total <br />minimum depth in all reclaimed areas of 48 inches, some Bench 1 material may be included to <br />achieve this goal. As described in Section 2.04.9, this is generally standard practice to place the <br />(Revised October 2009) 2.05.4(2)(d) -28 <br />