a TABLE 3 - WATEn Sample No. Atoll Isjand Date ur jr 1 2 Rongelap Rongelap 6 Mar 300 3 Rongelap 6 Mar 350 4 Rongelap 8 Mar 400 5 Utirik Rongelap (central cistern) Rongelap (North part of village) Rongelap (Northernmost cistern) Rongelap (Southernmost cistern) Utirik (cistern near church) 8 Mar 9 Mar 220 40 7 Rongerik Eniwetak (Distillation water) 10 Mar 6 Utirik Utirik (cistern at south of village) 9 Mar 40 240 In addition to the above, a sample of foilage was taken at the win ward side of Bikar Island, The radiation ficld was 180 or/hr on 9 March 19 at this point. 8. Conclusions and Recommendations ae The radiological survey proved that a large yicld surface detoi tion can produce extremely serious radiological contamination over_a distan: more than 120 miles downwind and important contamination about 250 wind, miles do b, The center of the contamination pattern from the BRAVO Shot li sonewhat north of Rongelap and Rongerik jitolls and probably not far from a. between Bikini and Bikar, c. Although the fall-out was serious om Rongelap Island located a the extreme southeast tip of the atoll, the contamination was about ten tim greater at the north side of the atoll, twenty miles away. d, The contamination decreased by a factor of about cight over th downwind distance of 50 milcs between Rongelap and Rongerik. e. Standard military field housing provides a sigificant degree f. The AN/POR-39 proved to be a very satisfactory instrument for ge A single DDE with two (2) whale boats is not a completely sati protection to personnel inside, field survey work under rigorous environmental conditions. factory method of conducting a broad radiological survey of the type jud completed, Future surveys should consider using vessels capable of enterin more of the atolls and of handling a helicopter and several smi boats, Di, 6 Incls: 1, Rad, Survey Rongelap 2, Rad. Survey Utirik 3. Rad. Survey Bikar 4, Rad. Survey Rongerik 5. Rad. Survey Ailinginae 6, Summary of Rad. Survey woul © atl /s/ Herbert Scoville DR. HERBERT SCOVILLE