the contribution to the soil is in the medium silt fraction (20-5 um); im the bare soil, it increased from a 22% contribution to almost 33%; and in the mound sample, it increased from 6 to almost 15%. The soil textural classification based on the dispersed sample place these soils at the lower limit of loamy sands, approaching sandy loam. FUTURE PLANS Plans are under way to sample soils from Area 11. Examination of the soils map and the FIDLER readings suggests that Site C in Area 11 might be interesting in terms of possible water transport during storms. Samples will be taken in Area 11 as functions of distance from GZ, runoff flow pattern, and depth of soil. Several samples will also be taken representing mounds and the adjacent bare soil. Preliminary studies of NTS samples revealed that plutonium in the silt sizes was of high specific gravity (Tamura, 1974); it would be desirable to examine a few samples from the high specific gravity zone using density gradient segregation to detect the possible occurrence of plutonium oxide particles. Furthermore, preliminary studies of density gradient segregation of samples from Mound Laboratory, Miamisburg, Ohio, showed that organic material has adsorbed a significant fraction of the plutonium in the sediment. These results suggest that similar studies with samples taken beneath the shrubbery at NTS may reveal possible association of plutonium with vegetative material. 15