NOTES
SOIL
1.
Spec. No., Collection date, Area collected, Description,
Depth, Backman readings - information supplied by A. Seymour.
2:
Beckman readings in mr/hr taken 1" above ground - shield
closed/shield open. Background - 0.05 mr/hr.
3.
Wet" refers to weight of soil as received at HASL.
lk.
"Dry" refers to soil aliquot dried at 100°C for eight hours.
5.
Procedure:
a.
Soil aliquot ashed at 550°C for 8 hours, then dissolved in HNO3.
Solution aliquot plated directly
on glass planchet for beta counting. Standardized
against 0.2 gram K2C03, mounted in similar manner.
b.
Self-absorption correction applied in each case:
based on self-absorption of activity in two top
soils.
6.
Sr-90 - suitable aliquot taken from solution of dissolved soil.
7.
Error term associated with each result is one Poisson standard
deviation.
SEAWATER
1.
Spec. No., Aréa collected, Collection date - information sup-
plied by A. Seymour.
2.
All islands in Rongelap Atoll except Mogiri, which is part
of Alinginae Atoll.
3.
All water collections made in lagoons except Mogiri, where col-
.
The total activity result was obtained by precipitating carbonate from a 200 ml aliquot, mounting on 2" plastic disc and
lection was made from anchorage.
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DOE ARCHIVES