Table 4. Size Distribution After Ultrasonic Treatment and Plutonium Activity in Two Adjacent Soils in Area 13 Size Range (um) Abundance* (4) Activity in Size Fraction (dpm/g) Activity per Gram of Soil Contribution by Size Fraction 11 8 10 334 2,050 1,317 182 117 0.3 0.2 0.3 8.3 50.9 32.7 4.5 2.9 4,029 100.1 2 4 6 163 2,031 413 116 41 QO.1 0.1 0.2 5.9 73.2 14.9 4.2 1.5 2,776 100.1 (dpm/g) (4) Nonvegetated Soll 2000-840 840-250 250-125 125-53 53-20 20-5 5-2 < 2 8.9 27.5 23.2 20.3 7.8 4,1 3.3 5.1 Total 100.2 120 30 40 1,645 26,250 32,125 5,445 2,285 2000-840 840-250 250-125 125-53 53-20 20-5 5-2 < 2 3.0 20.1 25.4 28.9 10.4 3.3 3.1 5.6 Total 99.8 80 20 20 565 19,495 12,700 3,120 735 *Abundance in percentage by weight. 14 fey roan Vegetated Soil