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• Section 816.25 Continued. <br />performed by a qualified laboratory using standard methods approved by the <br />regulatory authority. <br />Kerr North Area <br />Following overburden leveling and topsoil and subsoil replacement, <br />soil sampling and testing will be done as described in Section 780.18 <br />to determine suitability and nutrient status of the plant growth <br />medium in light of the approved postmining land use and the <br />revegetation requirements of Section 81.6111-816.117. <br />The sampling techniques will be those recommended by Berg (1978). <br />The ordinary agricultural practice of compositing samples will be <br />avoided in order to sample the variability of the topsoil. The range <br />• and distribution of the soil characteristics on a disturbed site <br />reveals much more than do averages. According to Berg's (1978) <br />recommendation, such sample collection techniques will provide that <br />soil materials which differ in color or composition will be sampled <br />as separate units. <br />Soil collection techniques will involve collecting a sample <br />comprising the total thickness of the reapplied topsoil. Results <br />will be analyzed according to the methods suggested by Sandoval and <br />Power (1978). Nutrient parameters to be sampled will include <br />nitrogen reported as ppm nitrate nitrogen. Organic matter will be <br />sampled to determine the potential nutrients available from the <br />source. Phosphorus shall be sampled and reported as ppm phosphorus <br />in the sail. <br />Results obtained from these tests will be compared with the nutrient <br />levels recommended for the plants which are to be re-established as <br />part of the postmining land use described in Section 8]6.133. If <br />nutrient deficiencies are encountered, the recommendations of <br />816-27R <br />Revised -October, 1990 <br />