Ff)
s
e
’
ay
tS
5
Pn)
7
+
*
rw
pe
¢Ch
u“
t
v
5
we
73
CONCLUSIONS
Barcngrounc exposure rates may be accurately reconstructed fron
carelul anaivses of soil gamma emitters and the contribution
ef cssmic cays.
In situ moasurements of exposure rates will
reflect significant contributions above bacxground of fallout
of tne uranium and thorium cnains can be ignored.
It is
intuitively obvious that a continuum éxists geographically
between areas which received worldwide and tropospheric fallout
anc those wrich received only stratospheric
fallout.
The
Cor worldwide)
1
hibit this
islands of Micronesia exhi
continuum such
that beyond about five hundred kilometers from the test sites
it may D2 impossible to distinguish between the contributions
to contemporary environmental exposures from U.
S.
Pacific
nuclear tests and those attributable to multinational worldwide
f™,
fallout.