Table 216.
Enewetak soi] data, southern islands (pCi/g in top 15 cm),
90...
Mean
Range
0,41
0.02-4.8
0.52
11
137 A,
Mean
2395,
604,
Range
Mean
Range
Mean
Range
0.21
0.01-2.1
0.04
0.004-0.31
90.03
0,01-0.15
0.03-3.9
0.14
0.004-1.8
0.07
0.004-1.1
0.06
0.007-63
1.6-34
3.2
0,5-10
0.63
0.02-2.0
0.58
0.04-5.0
Group A
(DAVID,
ELMER,
FRED)
Group B
(All others
except
LEROY)*
Group C
(LEROY)
“SAM, TOM, URIAH, VAN, ALVIN, BRUCE, CLYDE, REX, WALT, GLENN,
HENRY, IRWIN, JAMES and KEITH.
In an effort to obtain a reasonable
part of YVONNE which lies north of the
tower (Sta.
1310).
estimate of the three-dimensional distri-
This area includes
the highest external gamma levels found
bution of radioactive material in this area,
on the Atoll, with levels of 500-750 uR/hr
45 profile locations (shown in Fig. 152)
found over a five-acre site just south of
were sampled to 150-cm depths, Plutoni-
the CACTUS crater,
um data for the profiles along the center
In addition, pieces
of plutonium metal weighing as much as
of the island,
several milligrams are randomly
position of the plutonium-bearing layer,
scattered on or near the ground surface
are shown in Figs. 153-156.
over most of the area from CACTUS
all of the profile samples lead to the
crater to a line drawn across the island,
following observations:
about 60 m north of the tower.
e
Construc-
and across the island at the
Data from
There were no large plutonium
tion and earthmoving activities during the
particles analyzed in any of these
testing period, for which we have no
samples since the maximum
reliable record,
Specific activity found was ~800
Served to redistribute the
radioactivity in such a way that it is
pCi/g.
essentially impossible to get an accurate,
Except for the area in the general
detailed, three-dimensional survey of
vicinity of the exposed plutonium
radioactive species present in this area
layer, there were fewprofile
now,
Sampling locations where plutonium
tower,
Four hundred meters north of the
concentrations exceeded 100 pCi/g
for about 100 m along the ocean-
Side embankment, for example, there is
at anv depth.
a visible layer of dark soil roughly 20 cm
two had the high concentration in
thick,
the top 10 cm of soil.
10 to 20 cm belowthe surface,
Of the four that did,
Profile
which contains high concentrations of
Sampling locations where plutonium
plutonium (3200 pCi/g in one sample).
concentrations greater than 100
II-7