Results Outside the subsurface deposits, the average TRU concentration before any excision was 131 pCi/g, and after all lifts the average was 31.8 pCi/g. Therefore, k ky ecd ed 1 ed = = 131 31.8 = 31.8 = 0.2427 T3 = In (0.2427) = 1.4158 = 0.7063 and the average concentration in soil removed was 131 x 0.7063(1 - 0.2427) = 70.1 pCi/g. Then the total activity removed is 70.1 pCi/g x eubie yards excised x 1.185 10-6(Ci/yd3)(pCi/g). In the areas with subsurface contamination, the assumption was made that the total soil depth lifted was approximately 50 em. The top 20 em, or 0.4 of the total volume for these areas, was soil having a linear gradient, and the remaining 30 em (0.6 of the total) was soil with an exponential gradient. Thus, for the top 20 em, the before-excision average was 203 pCi/g TRU, and the after-excision (one lift only) value was 194 pCi/g TRU. So the average for the top 20 cm was 0.5(203 + 194) = 198.5 pCi/g. For the remaining soil the "before" excision value is the value after one lift, 194 pCi/g, and the average after all excision was 85.4 pCi/g. Then, for the remaining 30 em, = 194 ay k ky = 85.4 ky ke" 0.4402 1 = 1.2187 ed and the average was - 0.4402) = 132.4 pCi/g. The average concentration for the entire profile was therefore 0.4(198.5) + 0.6(132.4) ~ 194 x 1.2187(1 = 158.8 pCi/g TRU. Then the total activity removed from these areas was 158.8 x total volume removed from these areas x 1.185 x 10-6, arm The total activity removed from Kickapoo is the sum of the activity removed from the "without subsurface contamination" and "with subsurface contamination" areas. B-10-3