-12-
Figure 7
shows
island
‘ooo
decline slopes at
sites other than
Belle.
ISLAND SOIL
soil
ALICE
JAMET
BRUCE
ELMER
OLIVE
VERA
100f
Pre-Nectar
levels are indi-
cated by short
e
horizontal bars at
the left edges of
the graphs.
Except
at Bruce and Elmer,
the points are
widely scattered
ou
and the trends poor-
ly defined. Vari~
ations in exact
5
location of sample
taking, changes of
personnel, and the
use of single
samples contributed
to this variability.
Levels of
*
%
F
northern than at
the southern local-
Nee
ities.
LEROY
100
radioactivity were
much higher at the
HENRY
1
\
{
°
1
.
+
1
OAYS
100
AFTER
1
-
10
WAY 14,
1954
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.
Slopes ranged from -0.6 to -1.3, averag-
ing -0.9 ft 0.02.
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
3
declines were steeper than decays exceptat Janet where decays
were steeper, and at Vera where decay and decline were equal.
ya