VY.
RESULTS
The IMP results are tabulated in Table 2 and summarized in Table 3.
The control area appears to contain a little higher 24h a activity than
the experimental area. The decrease in values with increase in height
is as expected (approximately 10%) for the control area, but is not conSistent for the experimental area. Little significance should be placed
on this, however, because of several factors that could contribute to
these values. Some of these are (1) activity within the area is not
likely to be uniform, and (2) brush is not uniform within. the area.
It is noted that IMP I, detector 7496, requires a correction of 1.1
because of detector size. It is also noted, after applying the detector
correction factor, that the results of IMP III appear to be slightly
greater in value than those of IMP I. The averages are within counting
statistics.
.
.
The soil sample results are given in Tables 4 and 5 and plotted in
Figs. 5{a), 5(b) and 6.
Several conclusions are noted:
1.
The activity is highly variable from point to point and as a
~function of depth. The surface 241 ny activity varied from 2.25 to
14.14 pCi/g.
2. Six out of 12 sample locations showed the surface concentrations
to be greater than subsurface. The other six showed subsurface
activity to be greater.
3. The average surface activity (0 - 1.5 cm) was 6.98 pCi/g; the
average for 0 - 2.5 cm was 7.99 pCi/g; the average for 0 - 3 cm
was 9.55 pCi/g, and the average for the IMP reading was 5.44 pCi/g.