mea=
hoe
he
|
oe
ee
ae
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by outright dumping or by using it as landfill.
Bikini Atoll
of soil,
because cesium-137 is largely concentrated in the upper layers
falling off exponentially with depth
—an
(Figure 4).
soil to be removed varies from about 30 cm on Bikini
a few centimeters on Enedrik (Tables 6, 8).
be
handled
complex
with
impunity
precautions,
so
would
that
be
only
The depth of
Island to estimates of
The spoil (excavated soil) can
monitoring,
necessary.
but
not
Conventional
costly
masks
might
and
be
required for certain kinds of work owing to the level of dust or smoke.
The disadvantages of direct
removal
topsoil
is lost; second, some 10 years will
denuded
island
(shading and coconut
are,
first,
relatively rich
be required to revegetate the
production
are the slowest
to
appear
(Appendix B)); and third, substantial skills and costs ($6-8 million) will
be
required
for the
revegetation
program and
to
provide
for agricultural
development.
Soil
operation.
removal
becomes
more
For Bikini
Island,
the
efficient
jit
jis
time required would
be
when
a
large-scale
2 to
4 years.
Based on the unit costs in Table 7, the total cost would range from $36 to:
$80
million,
depending
dumping,
island
excavated
area
on
extension,
with
lagoon
how
or
the
spoil
causeway
sediment
is
is
disposed
of,
construction.
an
additional
@€.g.,
marine
Backfilling
option.
The
the
more
important details for such soil-removal programs are as follows.
r
4.3.1
burning
the
temporary
shield
refuse
loss
that
of
guards
almost constantly.
vegetation
can
be
Clearing.
or
food
The
storing
supply
against
it
and
process
on
an
excessive
unused
the
sunlight
clearing the land and
island.
Aside
destruction
and
the
winds
from
the
removes
the
that
blow
Under favorably planned conditions, it is thought that
reestablished
in
production are the slowest to reappear.
9000031
involves
amenity,
for clearing.
.
The method is feasible at
33
8-10
years;
shading
and
coconut .
The estimated cost is $3 million