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Section 816.25 Continued. • avoided in order to sample the variability of the topsoil. The range and distribution of the soil characteristics on a disturbed site tell much more than do averages. According to Berg's (1978) recommendation, such sample collection techniques will provide that soil materials which differ in color or composition will be sampled as separate units. Soil collection techniques will involve collecting a sample comprising the total thickness of the reapplied topsoil. Analyses will be analyzed according to the soil sampling techniques recommended by OSM and the MLRD and utilized in 30 CFR 779.21. The parameters to be sampled will include nitrogen reported as ppm nitrate nitrogen and ppm ammonium nitrogen. Organic matter will be sampled to determine the potential nutrients available from the source. Phosphorus shall be sampled and reported as ppm phosphorus in the soil. • Results obtained from these tests will be compared with the nutrient levels recommended for the plants which are to be reestablished as part of the postmining land use described in Section 816.133. If nutrient deficiencies are encountered, the recommendations of Ludwick, et al. (1975) will be implemented to correct the deficiencies. Based on historical revegetation monitoring in the reclaimed areas at Energy Fuels' operations, it is anticipated that nutrients and soil amendments will probably not be necessary for successful growth; however, soil tests will be conducted prior to reseeding. All soil tests will be performed either by qualified personnel at the chemistry lab located near the Energy Fuels' Tipple No. 2 (See Energy Mines No. 1 and 2 Existing Structures (Map 34)) or by qualified independent chemists at a qualified laboratory under direction of Energy Fuels. Only standard methods approved by • the regulatory authority will be used. 816-20