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