during June 1975, based on data
water concentrations from Federal
obtained from water samples collected
Radiation Council (FRC) part 20
at old and new well sites on the
standards
islands.
radiation.>
We also include results on
the radionuclide levels in three
for protection against
We are presently evaluating
rainwater cisterns on Bikini Island.
the radionuclide and elemental
Doses are calculated assuming water
content
consumption from both cistern and
collected from these wells in
groundwater sources.
January of 1977.
The chemical and radiological
quality of
us
the water is compared to
of
groundwater
to assess
samples
This will allow
the temporal changes
which may have resulted from
standards established by the U.S.
disturbance of normal groundwater
Public Health Service and
concentrations following
to the
drilling of
recommended maximum permissible
the initial
the wells.
Kield Operations, Observations, and Procedures
Between June 16 and June 24,
1975,
quality over as large an area as
possible.
five new wells for surface
groundwater were established on
island of Bikini and
the
two were estab-
We had planned
lish additional
wells in the south-
ern parts of Bikini and Eneu but
lished on Eneu Isitand.
The lecations
were unable
of the new Bikini wells
CHFH 1
time restrictions.
through HFH 5} and the previously
to estab-
to do so because of
The wells were started by exca-
established open well (HFH 7) are
vating a pit with a backhoe
shown in Fig.
depth of the groundwater surface.
tions of
1 along with the loca-
the three rainwater cisterns
sampled.
Figure 1 also shows the
locations of
the new wells
(FWR 1
to
the
Hard beach-rock layers were encountered at HFH 2
(2.7 m below ground
surface) and at HFH 5 (at 1.4 m);
and FWR 2) on Eneu and the previously
rock layers were not encountered at
established wells
any other locations.
(TWR 3 and FWR 4)
along with pertinent
reference.
landmarks
for
The new wells were
Then,
a gas-
powered hand-held auger was used toa
loosen
the coral aggregate below the
located to give the best possible
water surface to as great a depth
definition of the surface groundwater
as physically possible,
pe 559
and slotted