sandy, conducive to weathering and deeper penetration of
fallout.
Vegetation is much more dense over the central
part of the island.
The soil contains much organic matter,
and moisture is continually being drawn into the roots of
the plants.
These factors probably influence the retention
of fallout near the surface of the ground as well as cause
large local variations in soil activity.
Slight depressiors
in the ground surface can also become areas where fallout
might accumulate.
The spectrometer and ionization chamber
(As) results for locations along the 0 Transect are given
below.
The percentage of the total exposure is given in
parenthesis for each emitter.
SPECTROMETER AND IONIZATION CHAMBER EXPCSURE RATES
(ur/hr)
Location
1 0!
2 50'
3 50'
(in
brush)
5 300'
6 400'
7 1800'
8 1410'
*37 Cs
©“co
+45 sb
19.0 (77%)
17.8 (78%)
]18.9 (78%}
3.0 (12%)
2.4 {10%)
2.1 (9%)
2.8 (11%)
2.7 (12%)
3.3 (14%)
22.8 (61%)
27.2
(62%)
83.6 (74%)
28.1 (76%)
11.3 (30%)
12.5
(29%)
19.5 (17%)
4.9 (13%}
3.5 (9%)
4.0 (9%}
10.3 ¢9%}
3.8 (10%)
Total —ha—
24.8
22.9
24.3
24.0
22.8
25.0
37.6]
43.7
113.4
36.8
41.2
47.5
103.2
36.1
Locations 1 and 2 were ciose to the lagoon shore at the
beginning of the transect (0 ft. and 50 ft., respectively).
These were in small clearings.
The. brush became quite dense
only beyond about 200 ft.
on the transect.
The exposure
rates at Locations 1 and 2 were very low, characteristic of
locations near the shore.
Location 3 was also near the 50 ft.
point but with the instruments placed well in among some
vegetation.
A slightly higher exposure rate than at Locations
1 and 2 was recorded here.
Locations 5 and 6 were 300 ft.
and 400 ft. along the transect.
Location 7 was a slightly
depressed area near the 1800 ft. point.
This location was
characterized by quite heavy vegetation, scaevola and a stand
- 18 DOE ARCHIVE,
Spm me rem
2 ee peer cee ae