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Section 816.103 (b) Continued. • discussion on this topic is presented in Section 779.14 (b)(1)(iv). Specific data are presented in Table 108, Results of Analysis on Overburden and are statistically described in Table 4, Statistical Description of Overburden Chemical Data. The potential of solute leaching is discussed in Section 780.21 (c). In summary, no elements exist in the overburden in concentrations that would create any toxicit}• problems created b}• leaching. Therefore, no selective placing or special handling of spoil material will be necessary. Section 816.104 Backfilling and grading: Thin overburden. (a) The provisions of this Section apply only where the final thickness is less than 0.8 of the initial thickness. Initial thickness is the sum of the overburden thickness and coal thickness prior to removal of coal. • Final thickness is the product of the overburden thickness prior to re- moval of coal, times the bulking factor to be determined for each mine plan area. The provisions of this Section apply only when surface mining activities cannot be carried out to comply with Section 816.101 to achieve the approximate original contour. Energy Fuels does not have a thin overburden situation. The final thickness is greater than 0.8 of the initial thickness as demonstrated in Section 816.101 (a)(3). Typical values for the permit area range from 1.01 to 1.17. These values were arrived at Lhrough a range of representative computations in the discussion under Section 816.101. For further information see Eckman Park Wadge and Lennox Seam Isopachs (Piap 55) and Eckman Park Geology (Dtap 8). (b) In surface mining activities carried out continuously in the same limited pit area for more than 1 year from the day coal-removal opera- tions begin and where the volume of all available spoil and suitable • 816-133