addition, numerous pieces of small equipment were cleaned up for the various
projects and for H&N.
Normal procedure called for all heavy equipment re-
turning from shot fslands to be monitored on removal from boats at the boat
landing and directed to the decontamination station if necessary. Versene
and citric acid were the common decontamtnating agents employed, and a
steam generator was used to provide hot solutions for the necessary washing.
When equipment was not needed immediately, the vehicles were held in a
"hot" parking lut for varying lengths of time before decontamination in order
to reduce contamination levels by radioactive decay of the contaminants.
2.1.3-—The Piotting aod Briefing Section was responsible for the conduct
of all radiological surveys on the atoll, the majority of which were made by
hel{copter. Normal operations included a pre-entry survey with CTG 7.1 at
H+1 to H+3 hr, a detafled survey of the entire atoll at H+4 to H+8 hr, and
detailed surveys on the mornings of Dti and D+2 days. Addittonal surveys
were made as required. The basic Inatrvment used fn the aerial surveys
was a spectal lonization chamber built by 2 dan Electronics, Ine., to the
desired specifications. Some AN/PDR-S9 survey meters converted to read
500 r/hbr were also used. When necessary, data were radioed back to the
Rad-Safe Center from the survey helicopter. Plotting and briefing stations
were maintained In the Rad-Safe Center and the J-3 office. Ground surveys
of islands in the atoll were conducted when required.
2.1.4-Monitorg for recovery particn were provided by TU-7 when
necessary.
The demand was quite small.
three were furnished after any one shot.
Normally, no more than two or
‘general, projects providedtheir
own monitors as members of the recovery parties.
Monitora were respon-
sible to party leaders, who were expected to accept a monitor's advice and
plan thelr operations accordingly.
2.1.5— Laboratory factlities for radiochemistry work at Eniwetok Atoll
were obtained from the Army Signal Corps. One radiochemistry trailer,
AN/MDQ-1, was perked :.ear the Rad-Safe Building and used for all sample
preparation and counting.
wetok was quite small.
The work load of the Laboratory Section at Eni-
Approximately 100 samples of lagoon water were
processed after the MOHAWK, APACHE & HURON
devices were fired.
addition, several tritium urine analyses were performed.
In
Because of alpha
contamination after the
YUMA
and the KICKAPOO
shots, a cer
tain amount of alpha-countitng was necessary. Rain-water samples were col-
lected and counted periodically for gross beta-gamma activity or total alpha
activity. Chemical analysis was not required.
2.2
Shots and Survey Results
During the entire Eniwetok operational phzse, the contamination from
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