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Department of Energy
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Nevada Operations Office
PO, Box 14100
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Las Vegas, NV 89114
Mr. Gary S. Zumwalt
University of California, Davis
Department of Geology
7
Davis, California
Dear Mr.
95616
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SEP 7
1978
Zumwalt:
This will acknowledge your letter of August 29, 1978 regarding my
conversation with
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Although you do not mention the dates of your visits to Enewetak, I
assume that they must have been in the late 1960's or early 1970's
well after the conclusion of the nuclear testing at that atoll.
During those years there is no credible way that a person visiting
or working at Enewetak could have sustained an external radiation
dose, exceeding U. S. Federal Standards, due to environmental radia-
tion sources.
Nor, by the way, is there any way, by examination or
testing, of determining after the fact what dose may have been accrued.
What we can do after the fact is to assay the human body for certain
gamma-emitting radionuclides and the excreta for certain others. We
have done this in the case of a few people lmown to have participated
extensively in activities on Runit and the results, without exception,
have been negative.
Included were persons who have pi.cnicked and
remained overnight on Runit.
My statement to
if I recall it correctly, was that I do not
believe he has any reason to be concerned but that if it would relieve
his mind to have a bio-assay done, I would be pleased to arrange for it.
The procedure is non-intrusive and could be done at Lawrence Livermore
Laboratory.
I make the same statements to you, not as a recommendation
but simply as an offer.
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