PLO? 3F
July 29, 1957
C. L. Ounhan, M. U0,, Director
Division of Biology and Medicine
Gordon M. Inmning, Haalth Physic!::
Division of S{nlogy and Madicine
GAMMA RESURVFY %
HONGELAF
(S1LAN'
I thought yo. woudc ne interestec in tie resurvey made of Rongelap
Islane at our reyuest prior to the retourn of the Rongelapese. The
attached memiranduy snd maps summarize these data. You will note
the average , tm lone rate was about
.03 ur/hr (0.26 r per year)
at the time |: .L@ zeasurement on June «<5, 1957. This substantiates
our precictic: maie *o the Commission iast winter that "It is difficult to extrapo.s*e precisely far into the future, but the data
suggests that *he gamma dosea on Rengelap Ialand de no greatly
*“ roentgena for tr- “{ret year of reoccupancy
exceed (if a+ 4
~ oh
Enclosures:
1,
Memo to
dta@ 6/27
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