20
Table
4.
Mean concentration of
137
Cs,
90
Sr,
24]
Am and
239,240
Pu in surface
soil samples collected in 1974 and 1975 on Christmas Island in the
Line Islands and On Six atolls in the Marshall Islands4.
137
Collection Site
Ucchuwanen "
Rongelap Atol]
Rongelap Istand
Mellu
Kabelle
Lukuen
Gegen
Lomuilal
Bikini Atoll
"
"
"
"
"
Bikini Island
Nam
"
Enedrik "
ns°
na
0.3+
0.1(1)
0.08+ 0.06(1)
0.16+ 0.06(1)
2.84
1.6(5)
2.74
1.7(4)
0.27+ 0.06(5)
0.77+ 0.15(4)
3.4 + 2.7(9)
3.9
8.44
24
30
19
79
110
130
2.2(2)
+ 29(2)
+ 13(6)
18
5.64
7.6+
8
+ 0Q.7(2)
+ 68(4)
+ 61(6)
+ 88(3)
120
140
270
260
110 +100(15)
270 +350(5)
9.34 8.2(4)
210
+ 70(7)
+ 11{6)
+
1.9(3)
4.8(2)
1(7)
1.5 + 1.3(2)
3.1 + 2.0(3)
4.0 + 4.3{2)
2.0 + 2.2(2)
1.6 + 1.0(6)
240
+ 36(2)
+ 78(3)
+140(5)
+140(3)
+130(7)
2]
20
24
45
130
390
40
=+130(15)
+450(5)
+ 46(4)
6.1 + 5.7(15)
65
+73(5)
2.4 + 1.9(4)
28
+ 4,2(2)
=+10(4)
+ 9(6)
+17(3)
+710(7)
mn
+ 16(9)
3.1 + 3.5(5)
32
14
46
6]
«6+ 5(2)
+163)
+12(3)
+29(3)
11
80
23.
+12(14)
+85(5)
+ 6.9(4)
31
+16(2)
a.
Only data from samples collected more than 50 m from the beach were used in
b.
nis the number of samples used to compute the mean.
this tabulation.
Single sample (n=1)
errors are two-sigma, propagated, counting errors, whereas the error for
more than one (n>1) sample is one standard deviation of the mean.
c.
na = not analyzed; ns = not significant.
om
0.17)
~~
1.J4
19
Ailinginae Atol]
na“
23952405
—,
Utirik Atoll
Utirik Island
241
I+
Wotho Island
Mogiri Island
90¢,,
<.08(8)
Wotho Atoll
Rongerik Atoll
Eniwetak Istand
Cs
NO
Christmas Island
Mean concentration in pCi/g, dry (n>