in Aug ust
Gross beta ridioactivity of bottom samples from Rongelap Lagoon, 1958.
In Auzust 1458, bovtom sempies were obtained from ten plankton2nd eastern regions of Rongelap
collecting Stations
in the soutnern
Lacoon (Figvre 1).
At tne wirst nine stations ahip's personnel of
geepert veosch, LIM
the," Also") use i row Seao in the deoression in the lower end of the
sounding leid to get sinill amounts of sand and other bottom materials
that would adaere
and coul: be scraned off with a knife.
was ‘icuélly repeated more
tian once
the anchor orou,ht up 3ever:l
were
a. @acn station.
Whica were
At station 10
pounas of the vottom so that samples
tuken from bota the hinss of the anchor,
to have been aS about surface
The process
level on
which was considered
the bottom,
and from tae flukes
estimated by both snin-and laporatory-personnel to have
been about two feet below tne surface or the bottom,
At Seattle the samoles wera ashed, and
coun
ted
nidio-assayed
in methane
values
rangea
of ach.
O.47,
ay
from
.951
to
n\)
flow counters with the results shown in Table 1 and Figure 2.
Sample
&, «with a geometric mean of .08)3 uc/leg
AS:.iag cnanged wet sumplo weight by an average factor of
wotleh tneluded tne
natural organic matter and the soap.
The
soap contained 21ash.
The liiphese concentriticns of activity occurred at Stations 5
and 6,
chor at
nerth 4a..¢
west
3tation 1c
tne top inci. ov 8c
of at ieast
or
Eninetok
Island.
The
Samples
from the
an-
snowed tiat tne radioactivity was not confined to
Of tine botton. mecariail,
suggested that st
but, penetrated to a deptn
f
two feet in only silihtiy reduced degree.
sv
%
MM
” | Dom ARCHIVES .
cen a ne at