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The excerpt represents the core issue or deciding factor on which you must meditate, and is drawn from U. S. Project Trinity Report by Carl Maag and Steve Rohrer: to within about 90 meters of ground zero. The men scooped up soil
samples through a trap door in the bottom of the tank. One driver who
made three trips into the ground zero area received the highest
exposure, 15 roentgens (1).
This lead-lined tank was also used by ten men to observe the radiation
area. These men, traveling two at a time, made five trips into the
area on shot-day but never approached closer than 1,370 meters to
ground zero. The highest exposure among these ten men was 0.3
roentgens (1).
The next party to approach ground zero consisted of a photographer and
a radiological safety monitor. Wearing protective clothing and
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