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September 2b, 1956
BEST COPY AVAILABLE
CG. L. Dunhax, K.D,, Director
Division of Biology and Hedicine
Biophysics Branch, Atomic Energy Commission
Washington 25, D. Co
Dear Dr, Dunhems
Ae requested in your letter of February 3, 1956, an air
monitoring progren was activated st Los Alasos to make radiological
measurerents of fallout.
Keasurenents were started on April 20 and heve been continucus
to date, The methods of measurement followed those developed
by Mr. William Johnson of iis laboratory. Deta is reported
in the same units as used in the Public Health Service reports.
Since the measurements were started at approximately the
seme time as the Eniwetok tests we do not have adequate background
information.
The unusuaily high readings of duly 9 and July 10 were not
reported as being greater than five times backround since we
were not sure cf our background and methods of measurement at
that
time,
Sincerely,
Dean dD. Meyer,
Group Leader, Hei
DOM sph
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Co
ng Methods Used in Los Alamos Air Sampling
of Los Alamos Air Sampling
(3) Beta Activity in Rain Water Collected at Los Alamos
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