18
RADIOACTIVE CONTAMINATION OF AREAS IN THE PACIFIC OCEAN FROM NUCLEAR TEST:
C. Soils
Tables 19 and 20 show the analyses b:
Graph 3 shows the general levels of activity
in the soils of Kabelle and Labaredj Islands of
Rongelap Atolls, as reported by AFL.?
Tables 15, 16 and 17 report the activity in
different soils at different depths for the February 1955 survey,’ and Table 18 for the February 1956 survey * by NRDL.
bepenoehgtr sys
HASL.*
The data clearly indicate the major portio1
of the activity is to be found in the top thre
inches of the soil. As suggested in chapter II
Ce!—Pr'™ and Ru’-Rh’™ make up much of th
fixed contamination in the soils at periods of on
year and moreafter the fallout occurred.
Table 15——Beta Activity in Core Samples of Soil (NRDL)*
Beta Actrvrry (6-/min/g)
No. or
IsLaNp
CoRES
Likfep..------.---2--0----neee
eee
Utitik....--.-.nnnneeeenencnenne
neees
Rongelap.......--.--2-----20----202 eeneee ee
a
Enisetok.......2-222.----20e---eenercene ee
Labared).......-22...2+s00e--eeeeeeneeeeees
Kabelle...-.-.-...---200---eeeeneeeeeens
1-IN. INCREMENT OF SOIL CORING
Ist
ad
Bd
1
3]
4|
1}
1]
1|
3|
140
1,260
6,600]
10,800]
57,000
42,000
43,000}
40
480
2,100
7,100{
24,000]
83,000
30,000}
40) NDA)! NDA [ooo]eee|eeeeeeeneefeeeee eee
240
130
100
160
60
96 |-.--.---570
420
230
160
200
150
E
7,200]
6400}
6,800 |. ee feefeeepee eee
4,300 18,000] 26,000] 12,000] 11,000 |._........} oe.
29,000 23,000) 19,000 |...) ----eeeef nee feeeee
10,000}
3,600]
2,000}
2,300
180 |..2----22-[----eeee-
1]
2|
87,000]
35,000]
37,000]
40,000]
Lomuilal.......------.-----.-..--..-------+
3
Bikar......-....--...-.- ween nnn eee eee eee
Eniwetak .-.-..---.-..---------------------
3
2
Gefen...22-222 ee cece eeeeee eee ee
Lukuen..._....----..22--.-2eeeeeeee eee
(s) No detectable activity.
*Coliections made about February 1, 1955.
§3, 000
4,000
16, 000
-
Tstan
Activity
minig),
26, 000
20, 000
14, 000
740
7, 600
250
3, 000
170
2, 000
120
1, 800
bets eee
ma". ce3y
rele Ee
annbeeam
i
Eniactox.-----...-..-------------
2}
48, 000
6
96, 000
Labared)...----------2---+--00--2~
abele
---
me
Gejen.. ..---..-------------- eee
Bikar__.-----------e.---e 2222-200
Eniwetak - -_....-.--.-.-.-.---ee
5
3}
DEPTH
(8-/
oF
1toSin.
on weveceteeBg
8, 800
85,000
800
640
1,300
3,100
1
348, 600
12, 400
1
12, 000
240
i
8, 400
90
*Oollections made about February 1, 1955. Data reported as of March
1, 1055,
4,000]
10,600]
4,400]
10,000}
7th
sth
oth
1, 000 j---.---.-.|..--------]-------.-
4,400 |-.....-...|.----22 [ee
10,000]
4,700 |.-.-.---_-|..---..
100
1, 100
27 |----------]--------160
100 |[-..-.-.--
Table 17—Beta Activity in Soil Samples Take:
From Exposed Soil Profiles (NRDL)*
Beta Activiry (§-/min/g), IsLanp
DEPrTa (N.)
Rongelap| Labared}| Kabelle Kabelle | Kabell
eeeneesccwerennatenne erence ers
eee
eee
Rann nnnnnnnnnnonecneennccnone
Rongelap--.....---.--------------
8,000}
13,000|
om
Otolin.-|
oF
6th
Data reported as of March 1, 1955.
Beta
oF Bowens)
bth
48, 000
Table 16—Summary of Beta Activity
it in Gross
Samples of Soil (NRDL)
N
4th
Oto 1...-.-.--.--.-
12,400
130,000
72,000]
93,000|
97,0
Ocrseecteteestetees
9... .----2-220-- +++
10
140
950}
770
1, 700
130}
400
2,300
i
2
3...------------ ee
1, 500
12....--..------ NDA(s)
1B...ennenenneee
70
24.Leeneeneeeeeeeefeceeenenee
380
160
120
“0
6, 800
0
70
100
BO. enn u ne nnn ncen|ececacence!---eeee---|----------
36.._.-------ee----[|-.------e.|-..---- ee
40...
« No detectable activity.
2, 900
580
70
70|
NDA
5
Le
NDA
‘
|..._.....
eo |.........
0 |...
*Collections made about February 1,1955. Data reported as of Marc
1, 1855.