ae
TABIE_3 = WATER
Sample No.
1
2
Atoll
Island
Date ur/ir
Rongelap
Rongelap (central cistern)
8 Mar
300
‘8 Mar
350
8 Mar
400
8 Mar
220
Utirik (cistern at south of
village)
9 Mar
Eniwetak (Distillation water) 10 Mar
40
240
Rongelap
3
Rongelap
4
Rongelap
5
Utirik
6
Utirik
7
Rongerik
Rongelap (North part of
village)
Rongelap (Northernmpst
cistern)
Rongelap (Southernmost
cistern)
Utirik (cistern near church)
9 Mar
LO
In addition to the above, a sample of foilage was taken at the wind:
ward side of Bikar Island, The radiation field was 180 or/hr on 9 March 195)
at this point.
8.
Conclusios and Recommendations
.
*
eS
ae The radiological survey proved that a large yicld surface detortion can produce extremely serious radiological contamination over a distancmore than 120 miles downwind and important contamination about 250 miles dow
wind.
b. The center of the contamination pattern from the BRAVO Shot Me.
sauewhat north of Rongelap and Rongerik Atolls and probably not far froma L
between Bikini and Bikar,
¢.
Although the fall-out was serious on Rongelap Island located at
the extreme southeast tip of the atoll, the emtamination was about ten times
greater at the north side of the atoll, twenty miles away.
d. The cmtamination decreased by a faotor of about eight over the
downwind distance of 50 miles between Rongelap and Rongerik,
e. Standard military field housing provides a significant degree at
protection to personne] inside,
f.
The AN/PDR-39 proved to be a very satisfactory instrument for
ficld survey work under rigorous environmental conditions,
ge A single DDE with two (2) whale boats is not a completely satisfactory method of conducting a broad radiological survey of the type jut
completed, Future surveys should consider using vessels capable of entering
more of the atolls and of handling a hclicopter and several small boats.
6 Incls:
1, Rad. Survey Rongelap
LACOrPI;ED/DOE
:
a
2. Rad. Survey Utirik
3. Rad. Survey Bikar
4. Rad. Survey Rongerik
5 Rad. Survey Ailinginae._ -.-
/s/ Herbert Scoville
DR, HERBERT SCOVUOLE
¢--
Technical Director
AFSHP
mmpeamanamamaammemamion\
6. Summary of Rad. Survey> Sggggeneceelggss
4
/