%.
-1l2-
Figure
shows
island
7
1000
soil
ISLAND
.
decline slopes at
sites other than
Belle.
Pre-Nectar
levels are indi-
ALICE
SOIL
JANET
OLIVE
VERA
10of
cated by short
0
horizontal bars at
the left edges of
the graphs. Except
at Bruce and Elmer,
the points are
widely scattered
and the trends poorly defined.
Vari~
ations in exact
3
taking, changes of
*
location of sample
personnel, and the
use of single
samples contributed
to this variability.
Levels of
radioactivity were
much higher at the
northern than at
the southern localities.
op
:
|
BRUCE
2
ELMER
1
HENRY
LEROY
|
100
tt
»
‘fr
=
01
\
-
1
.
{
.
a
{
100
10
DAYS AFTER mAY 14, 1954
100
16
100
Fig. 7
Table 3 gives decay slopes of island soil samples from
various islands over a time span of from one or two months to
more than two years.
ing -0.9 f 0.02.
Slopes ranged from -0.6 to -1.3, averag-
since the five soil decay curves with more than two points
are fairly straight lines, 2-point slopes were used to expand
the scope of observations. The period of time covered by the
decays is close to that of the declines. Table 3 shows that
declines were steeper than decays except at Janet where decays
were steeper, and at Vera where decay and decline were equal.
my OF
At C Hi 1VES
1000