.
-A a
a
wos
SS
.
LSA
aes, os
aS
>
SD~
a
oe
ae
Fog
>
A
Sots
A
J BAT ONAL
tek 8
ow
a “ANE * >
>
ye “s & TAN.
ne - “ss
~
.
=
we
:
>
Summary
at
DL
7
2
1a
fea
ere
The sets of data on fallow:
frem
the U.
3.
soils,
“ne Ta
.t: Mle
nevi.
dust-fall and the pot and rainfall from New York City and Pittsburgh all
indicate that the current gummed film estimates of Sr-90 deposition are
in error.
This is particularly true for activity attributed to tests in
the summer of 1956,
The actual Sr-90 measurements show the debris to be
much older, and the gummed film data must be recalculated on this basis.
It was not possible to recalculate the mass of data involved
for this report, but
this will be done.
In the meantime, the gummed
film estimates of Sr-90 must be considered as minimum values, subject
to correction.
Further samples and analyses on pot and soil samples are required before conclusions can be drawn as to the extent and uniformity
of fallout outside the United States.
Such work is in progress and will
be reparted when the results are completed.
- 19 -