CHAPTER 1
doled

PLAN ABD ORGANIZATION

Analysis of Samples

All samples were mailed to the Bealth and Safety
Division “eboratory “or analysis, where they were ashed end

sounted bp automatic beta cnuntere (1).
Yel THE WORLIWIDE SAMPLING NETWORE

Sumpling stations were selected accerding to ths

principles *o lowed in previous surveys (1,2), modified by

the leestion of the weapons tests and the possibility that
stgeifisant faliout might cocur in any pert of the world. Lese
oeverage was provided for the United States than during recent
weapens test sories but many vare aff-continent stations were

set upe

The demestic stations are lished in Table 2el,, Chapter 2,

sebieae oxteide of the amrtinental United States are given in
td

A new feature wae the utilization of IBM cards in

place of the keysort syatem used in ths esrlier teet eeriee.

Belel Selestion of Stations

°

Lele? Sampling
Ab each station, 2, hour sauples of settled dust were
collested ty exposing one foot squares of gamed paper in the
warmer descrized previously (1). The standard ssmpliig period

began at 1870 CT, Celleotions were in duplieate exoupt that in
some oitios two stations, some distance apart, were mizcained
and a siugle daily sauple was collested at eache

AERIALMONTTORINO
Frow bases a¢ Kwajeloin, Guam, and Barber's Point,
Honolulu, f.igh's «fter MIKE were made over the Hawaiian islands,
the Marshalls, the Carolines, the Marianas, tho Japanese Islands
of Honshu, St.ioku and Kyvehu, and the islands extending southwest from Japan to the archipelago of Manse! Shoto. This was
the coverage provided for in the original survey deeign (3) pive
additional flights to the north and northwest of the Marianas.
The latter flights were undertaken on the baais of measurements
made in the northern Martenas and the need to delines‘e the
northern edge of the fallout sone. The reconnaissance in this
area on M plus 6 and M plus 7 accomplished this purposes
Followi:g KING, a less extensive au: vey, limited to
the Marshalls, ti. eastern Carolines and the Marianse was made.

Ronclulu, Guam, Ponape, Truk, Midway, and a foe large eities in the

Crarte of the above flights are deferred to Chapter 2,
so that the monitoring results, which form part of the subject
matter of shat chapter, may de presented on the seme maps
(Figures 2.1 and 22).

and wee supp] emented by sampling fr shorter periods at special
stations set up at Kwajalein, Guam, Midway, and Barber's Peint,

1.2.2 Survey Instruments

Filtered samples (2) ef airborne dant rs.0 collected at

Unitod States, where loeal interest in tne results was anticipated.
This type of sanple was collested over the standard 2, hour period
Honolvlu, during the tine when the cleud was known to be in the
vieinity ef the stations. «utomatio mits fer sampling «‘rborne
dust were set up for MKOXE

shot at Kusate, Ujelang, Bikini,

Majuro and Kmajaleine The equipment was designed te trigger at

“no aerial survey instrument illustrated in Pigure
lel, consisting of s gamma detector and a recording unit, was
designed and fabricated within the Health and Safety Diviaione

005 sr/hy bet this level was not reached. The units were not
reset for XIFG anote

eee

At three of the four speeial stati as,dust was alse

gar led with the easeade impester (1,2), but the activitine

seved te be teo lew to permit asowrate analysis of the -u.rtiole

aise distributione

s.

ale

Le

Select target paragraph3