SampleNo, dtodd island Rate rr 1 Rongelap Rongelap (central cistern) 8 Mar 300 . 3 Rongelap village) Rongelap (Nerthernazost S8lar 450 . 4 Rongelap 5 6 Utirdile Utirde 7 Rongerik 2 Rongelap Rongelap (North part of cistern) 8 Mar 400 6 Mar 220 Village 9 sar Eniwetak (Distillation water) 10 Mar 40 240 Rongclap (Southernmost clatern) « Utirik (elstern near church) Utirik (cistern at south of 9 Nar uO In addition to tho above, a sample ef foilage was taken at the wind ward side of Bilar Island, at this point. The radiation field ws 180 ar/hr on 9 “arch 195. 8. Recemmendat ae Tho mdtiological survey proved that a large yiold surface deto:. tion cen produce extremely serious radiological contamination over ea distanc more than 120 adles downwind and important contamination about 250 miles cc:. wind. b. The center of tho contamination pattern from the BRuL% Shot Lic. semewhat north of Rengelap and Rongerik tells and probably not far fron a L between Bikini and Bilar. ce fAithough the fall-out wis serious on Rongelap Island located at the extrome southeast tip of the atoll, the contamination was about ton tim: greeter at tho north side of the atoll, twonty ailes amy, d, The combamination decroseed by a factor of about eight over the downwind distance of SO milcs betweon Rongolap and Rongerik, @. Standard ailitary field housing provides a sigificant cegrea co protection to personnel inside. f. The AN/POR]39 proved to be a vory sntisfactory instrumnt for field gurvay work under rigorous environmental conditions. G- A single DOE with txo (2) whalo boats is not a completely sati_- factory method of conducting a broad mdiological survey of the type jut ed, Future surveys should consider using vessels capable of ortering more of tho atolls and of handling a helicopter and several small bocts. Rad. Survey Rongelap eae ° 1. 2. 3, 4, 5. Rad, Rad. Rad. Rad. Survey Survey Survey Survey Utirik Bikar Rongerik Ailinginae 6& Summary of Rad. Survey 6 er Scoville /s/ Herbert r DR. HERBERT SCOVILLE Teehnical Director AFSTP