was determined, each fish and clam tissue sample was dried in ovens at 90°C to
constant dry weight and dry ashed in muffle furnaces at 450°C for approximately
The grey-white ash was then homogenized and placed. in suitable counting
72h.
In some instances the samples were too small to achieve suitable
containers.
counting efficiency and were stored for future analysis if needed.
All samples (except the filtered water) were first counted on Ge (Li) gamma
A large number were split; a fraction was retained at LLNL and
spectrometers.
the remainder,
sent to a contract
along with blanks, duplicates, and standards,
laboratory for analysis.
and
groundwater
prepared
for
operations.
animal, vegetation,
samples were
analysis
collected
during
the
The number of total
listed in Tables 2 and 3.
fish, clam,
from
the
Northern
samples
12
sediment,
atolls
Marshall
and
2
Islands
that were prepared
Duplicate samples sent
cistern water,
islands
survey
and
field
for analysis are
for analysis are listed
in
Table 4.
The terrestrial samples are summarized according to major category, atoll,
and island in Table 5.
and island appears
A summary of fish and clam samples arranged by atoll
in Tables 6
to 8.
The water and sediment
sample
summary
appears in Table 9.
A more detailed breakdown of plant, animal, fish, and clam samples by atoll
and island is
accompanied by
listed in Tables 10 through 36.
a
figure
islands (Figs. 2-16).
showing the
atoll
The summary for each atoll is
and
code
letter
and
numbers
for
Thus, it is possible to determine the number of samples
collected at various regions of the atoll.
SUMMARY OF RADIONUCLIDE ANALYSES
We analyzed most samples for 906.
samples
238
Pu and
241
Pu were also
1376.6,
measured.
23942405 and
Gamma-spectrometry
24 lane
In some
measurements
were made on all separated samples at LLNL using a variety of Ge (Li)-diode
detector
systems.
Counting
times
were
sample.
14
usually
1000
min
or
longer
for
each
“Eye
Over 5400 soil,
sageR
SUMMARY OF THE COLLECTED SAMPLES