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• <br />REVIEW QUESTION <br />2.05.4 <br />(2)(c) 1. Inspection of the soil horizon description indicates that <br />there is nearly as much variability in the color of A horizons as between A <br />and B horizons within most profiles. Color or hue differentiation by the <br />equipment operator is not an adequate method for determining stripping <br />depth in itself. <br />2. How were the topsoil volumes derived for Table 3. Based on <br />the information presented in Exhibit T, these volume estimates could vary <br />by a factor of 5 in some cases. Specificity of these data is a critical <br />issue with respect to development of topsoil balance sheets. Please submit <br />more specific information. <br />RESPONSE <br />I. The soil horizon descriptions indicate that there is some <br />variation within the A horizon but only to the "trained eye" <br />using Munsell soil color charts. There is a clear differ- <br />entiation between the A and B horizon in the active mining <br />zone. The Routt soil serfies composes most of the mining <br /> <br />zone and has an easily distinguishable A and B horizon, even <br />to the "untrained" eye. -= _ <br />In addition to the color differentiation, cut stakes will be <br />added by the environmental engineer prior to topsoil removal <br />to aid operators in removing the proper depth of topsoil. <br /> <br />