Table 4.
Median surface soil concentrations
(0 to 15 cm).
Soil Concentration, pCi/g dry weight
0.92
0.86
0.067
0
0c
41 (35)
126 (5)
69 (18)
68 (70)
76 (128)
4.1 GD
34
43
48
48
43
2.9
Cs
239,2
9 4105,
2.3
9
aa
a
a)
€51)
(70)
1.8 (51)
.
0.94
Island
0.59
137
0.98
Eneu
Istand*
60.
Co
b
Area 3
Bikini
Area l
(51)
Area ?
Area 4
Nuclide
(6)
(6)
4.5
€10)
3.7 (6)
.
.
(3?)
(33)
2-1
(34)
.
.
(140)
(BP)
.
3.0
(176)
(178)
(254)
,
(663
(68)
0.25
ATS)
(146)
0.22 (68)
ty
Arithmetic average of soil concentration in Areas 1-4 on Bikini Island.
Number of samples taken.
SOUL PROFILES
of
(88)
3.0
2.7 (31).
(87)
because of this inhomogenity, general-
Soil profiles from different parts
izations are not very meaningful, and
Bikini
these islands cannot be characterized
and
Eneu
Islands
show a wide
range of activity distributions with
by "average vertical profiles" with
depth.
which
(A listing of the concentra-
tions measured
and
for each profile is
soil
environments
estimate
dose.
types of profiles
1?
delineated at Enewetak Atoll
are
presented graphically in Appendix 3B.)
1
to
The four basic
piven in Appendix A and the data are
As noted by Held,
to formulate cleanup criteria
“ different plant-
all present on Bikini Island (see
exhibit
Fig.
different
4).
Although we could not
vertical patterns of nuclide migra-
identify any particular profile
tion.
for extensive areas on
of
The nearly complete disruption
Bikini Island,
specific locations can be assigned
the upper soil layers at Bikini
Atoll by clearing,
"typical" profiles for predictive
construction, and
testing over the past 30 years as well
purposes.
as by agricultural practices initiated
Island a group of samples
more recently has created a variety
close
of plant-soil environments.
‘Thus,
type
the
For example, on Bikini
proximity
to
one
taken in
another
(TOOS]L, TOLOL, TOLIL, 10121, and
inhomogenity of the soil on these
T0131) show penerally decreasing
3.Sslands is not Surprising.
activity levels with depth despite
However,
-~ 1L4-
So“338