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Air Samplt
Of the 20 air samplers in operation, only a few filters
showed any appreciable increase of gross beta activity, with the
highest reading 160 uue/M> for a 16 3/4 hour sempling period.
The
highest {odine concentrations found in air were 1.7 yuc/M of I-132
and 18 yyuc/M? of I-133 on December 11, 1961, and 3.5 yye/M> of
I-135 on December 10, 1961.
All of the above were well below per-
missible levels for the general population.
Water
1.
Fourteen water sampling points were selected in the vicinity
of the Gnome event.
No significant difference was found between
the post-test and the pre-test water samples collected and analyzed
for radioactive content.
Animal Sampling
Five cattle were slaughtered prior to the Gnome event and
five more about a month after the detonation, for radiochemical
analysis of their body tissues and organs.
All the radioactive
concentrations were found to be comparable for pre and post-shot
samples.
DOE ARCHIVES
Surface Contamination
Although the radioactivity released following this test was
largely gaseous in form, there was some particulate fallout in the
local area.
Some vehicles passing along Highways 31 and 128
(about nine miles from ground zero) were contaminated » with the
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