-
J. ROMCELAP AND AILINGNAE (CONT'D)
Handbook $2 for lifetime consumption. The Utirik samples varied fram 100
to 1000 times the accepted tolerance. These data indicate the necessity
for thorough cleaning of the cisterns before refilling for general
cofisunption,.
Existing conditions made it impractical to attempt any assay for the
plutonium activity, which say be of importance in these samples.
3.All ROSE
BATES AND DOMES: AtLineee
atoll, Zelands@ 23heading
igri,pertains
6 sr/be.
of the remmining report under
t et
to Rongelap AteLl.
EE at the standard position established by Scoville,
the re
at
ours on 21 April was 17 or/hr. This measurement, snd
those made on ll and 26 March fit a decoy forma 169t-1.526 r/day (t in
days after 1 March) within about 3%.
On 22 April readings were mide cn other Rongelap Atoll Islands as follow
TSAND
AVE.
MAX.
EXPOVENT
Emisetok 32 ar/hr 34 ar/hr
“lok
Basch
17 arf/hr 21 or/he
i)
Endaelo
20 ar/hr
LOCATIONS
2 stke=100 yds beach, just
north at western peninsula
1 stk-$0 yds beach, center
of path in south grove
(no prior data)
1 stk-south end of island
With reasonable precision, these readings (and that on Sifo Island) are
related to previous observations by the same decay exponent.
ae 0
Teland,
OR CONTAMINATION: Returning to the status of
it was noted, 1s on she 26 March survey, that the readings over grave
areas tadout 1$ ar/or) were consistently lower than cover grassy areas (about
20 mr/ar). ‘The amooth concrete floor of the roofless cmrech gave a contact
reading of about 6 ar/hr, while the contact reading on the bordering gravel,
about 18 ar/hr, was congistently higher than more distant gravel, adout
15 ar/he, as though the redicactive particles that landed om the concrete
had been swept into the nearby gravel by the wind, (a eimilar phenamencn ws
noted om Parry Island during the Greenhouse C,.:ration).s
No exeeptional contamination of sleeping mts wae noted, but this
question was not studied extensively.
It was noted, however, that in those
hate that had few openings, the contact readings on the floor, doth om mat
and on dirt, were exceptionally low (4 - § mr/hr),
Contamination of thatched roofs was noted, particularly on windward
alopes, where the contact reading on the instrument was as much as 100% in
excess of that obtained when the instrument was held at the same height socve
ground at same distance fran the rocf, However, since the excess reacing ol
«,
magne
pm
sed