Analysis of selected samples for cesium-137 indicated distribution with
depth similar (slightly lower fraction near the surface) to that for
plutonium-239 as reported by Harley (1975). The average concentrations
in the upper 10 cm of soil for the four sites did not indicate geo-

graphical dependence such as that indicated by the plutonium-239 data.
Furthermore, all the values for the top 10-cm interval were less than
the average deposition (100 nCi/m2) reported by Hardy (1976).
The 15

cesium-137 samples for the upper 5 cm give a good fit to a lognormal

distribution, providing additional evidence that the cesium-137 deposition

around the Rocky Flats plant fits a single distribution related to

worldwide fallout.

669

Select target paragraph3