ee
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1845 brs, 2 March.
ASLE Fattern indicated 95 mr per hour at
Based upon the best estizate of faliout time it was
calevlated that a dose to infinite time woulc reach approxicately 20
soentgans. Salaccing the effort required to move the 400 inhabitants
ageinst the fact that such a dose would not be a medical problem it was
decided not to evacuate the atoll.
Indications from zerial surveys indicated substential fallout
occurred on the wmpopulated islands of Bikar and Taka.
Very cinor fallout occurred in 2 southwesterly and westerly direction
on Eniwetok and Ujelang &tolls but levels did not exceed 1Qnr per hour
at Eniwetok nor 3=> per hour at Ujelang. This was apparently very fine
particuiate matter carried by the low trade wind component.
& detziled plen was made to maxe ground surveys of al) islands which
had fellout in excess of lOmr per hour at estimated fallout time to previde information as to decay rate and verification of estimation of aoses.
Gater and soil samples from these surveys were shipped by air to HASL, kY
Operations Office, Attention: Mr. Merril Eisenbud, for detailed anaiysis.
Oodyene
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The only other populated atoll which received fallout of any con-
sequence at all was Ailuk.
"pale cae achacbinihsvevmivallonninaAidan + Pattenett:
Calculations appended in the
ag
154 natives were evacuated.
t
medical tab.
ee
.
time was 17r.
Evacu-
Estimate of dose to actual evacuation
Pe
ation complete 1245 hrs, 4 Larch.
ree een
thee
that estimated dose at time of earliest evacuation would be l3r.
.
aeriél survey of Utirik by a5Li Fattem indicated 620 or/hr at
1651 brs, 2 March (later re-calibrated to 240 mr/hr). Gn 3 Larch 1245
ground survey indicated 160 mr/hr. Decision to evacuate based upon fact
eT
Inasmuch as some natives of Rongeiap were reported to be on
alinginae, tne atoll wes surveyed, 17 natives loceted, and an intensity
of 445 mrynar was found. . Evacuation was complete by 1800, 3 Marek. The
aose computed for this group is &0r end det2ils are eppended.
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Lt Colonel, USAF
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