EEE
TABLE
2.4
Beta Activity in Soil Samples Taken From Exposed Soil Profiles
Depth
Beta Activity (87/min/g)
(in.)
Rongelap
Labared}
Otol
12,400
3
Island
Ka belle
Ka belle
Ka belle
130,000
72,000
93,000
97,000
1,500
380
6,800
2,900
440
6
110
950
1,700
400
130
9
140
710
130
2,300
240
160
40
$80
140
120
10
70
90
40
100
70
NDA
12
18
NDA (4)
70
24
30
-
36
.
40
NDA
60
.
40
No detectable activity
{?
(a)
-
Table 2.5 summarizes the data derived from the tube coring
samples.
Cores were analyzed in ]-in. increments and while some
movement of activity along the walls of the tube was probable the results for the most part agreed rather well with those obtained by the
other sampling procedures.
A comparison of Tables 2.3, 2.4, and 2.5 indicates that the cor-
ing technique falls down somewhat at high levels of activity although the
apparent movement of activity may be real and may bea function of the
Soil particle size and not a mechanical cross-contamination.
DOE ARCHIVES
The data in Table 2.5 show very definitely that the residual
activity on the islands is contained primarily in the top several inches
of soil and that movement is occurring. Data presented in Chapter 3
deal with the nature of the contamination in the environment and from
them it can be deduced that fractionation takes place, with Ce'*##. pr!"
and Ru!$_ Rn! making up much of the fixed contamination. The plant
- 8-