Table 3. Size Distribution and Plutonium Activity in Two Adjacent Soils in Area 13 Size Range Cum) Abundance* (4) Activity in Activity per (dpm/g) (dpm/g) Size Fraction Gram of Soil Contributed by Size Fraction (%) Nonvegetated Soil 2000-840 840-250 250-125 125-53 53-20 20-5 5-2 < 2 9.0 30.2 26.2 21.9 6.4 3.0 1.8 1.6 Total 100.1 195 190 206 4,645 26,556 28,350 3,540 2,250 18 57 54 1,016 1,686 836 97 36 0.5 1.5 1.4 26.7 44.4 22.0 2.6 1.0 3,800 100.1 1 40 23 384 1,932 163 20 10 0.0 1.5 0.9 14.9 75.1 6.3 0.8 0.4 2,573 99.9 Vegetated Soil 2000-840 840-250 250-125 125-53 53-20 20-5 5-2 < 2 3.1 20.8 30.4 34.5 8.7 1.1 0.5 0.6 Total 99.7 40 190 75 1,115 22,180 14,305 3,965 1,720 | *Abundance in percentage by weight. 12