8 24 Tam, and 239,240 Pu in the top 10 cm Mean concentration of 136. 905, of soil from the soil profiles on Bikini Island. TABLE 3. Mean Radionuclide Concentration in pCi/g, dry + SD a Profile 137¢¢ 906), 24) an 23952405, 1 36 + 6. 19 + 2.5 0.7 + 0.2 0.5 + 0.1 2 23 + 2.5 15 + 6.4 0.6 + 0.2 0.8 + 0.1 250 +110 9.9 + 4.8 5.9 + 3.8 2.4 + 1.3 4.3 + 2.) 3 250 + 120 9 53 + 28 60 + 17 10 230 + 22 440 + 38 11 9.6+ 5. 12 + 3.8 11 #6+1.7 0.2 + 0.1 26 +¢ 5.8 0.4 + 0.2 ‘12 120 + 20 210 + 67 7.641.9 A 46 + 30 61 + 14 C 14+ 18 46 + 34 D 80 + 5] 150 + 31 Wt o6+5.3 E 57 + 99 + 15 3 +0.6 6.7 + 1.3 G 45 + 13 38 + 2.7 + 0.1 3.8 + 2.0 I 168 + 3] 110 + 41 L 150 + 11 280 + 67 N 42 + 25 35 + 20 6. 1.9 + 5.8 1.7 + 1.3 4.0 + 3.3 0.9 + 0.9 + 1.7 .9 18 TW 7.9 + 1.6 19 na +48 38 $4 8 4.4 + 3.0 8 + 8 The error term is one sample standard deviation of the values for the three incremental samples - 0 to 2.5, 2.5 to 5, and 5 to 10 cm - used to compute the mean. The value for the increment from 5 to 10 cm was weighted twice as heavily as the other two incremental values. £15