-33-
Profile
e obtained off
samples of the lagoon bottom wer
feet and off Lomuilal
, lle Island at depths of 60 feet and 40
Rand at 55 feet.
The samples were obtained by an aqualung
the
Biipped diver driving a foot long, 14"-aluminum tube into
tom sand. The core was removed from the tube and samples
me taken at various levels.
From the counts of these samples
I vas observed that the radioactive sand on the lagoon bottom
we
several inches thick with the level of activity rather con-
Ant for the first five or six inches.
The radioactivity per
Rit weight was less than that of the soil from the island
proper but off Kabelle it was greater than that of the sand in
fe intertidal zone. |
ater
The water collection included eight salt-water samples
Pom the lagoon and eight fresh-water samples from the
roper.
islands
A 5-milliliter sample was used for the radioactivity
mtermination except for the December 18th collection (cistern
pter, filtered well water), for which 25-milliliter samples
fre used.
;
ted
Because the radioactivity of water samples is often
in terms of the radioactivity per liter, which would
pan extrapolation considerably beyond the observed values,
: especially
necessary to state the counting error.
it
For these
pts the 0.95 counting error,” which is equivalent
to two
ndard deviations, was arbitrarily selected.
beecee ton P+126)
F
pT.I.S.,
adioactivity
In Appendix
pratistical methods used in the measure-
(some useful
Oak Ridge, December 1949,
graphs)
graphs)
- A. H. Jarrett,