ae TABIE_3 = WATER Sample No. 1 2 Atoll Island Date ur/ir Rongelap Rongelap (central cistern) 8 Mar 300 ‘8 Mar 350 8 Mar 400 8 Mar 220 Utirik (cistern at south of village) 9 Mar Eniwetak (Distillation water) 10 Mar 40 240 Rongelap 3 Rongelap 4 Rongelap 5 Utirik 6 Utirik 7 Rongerik Rongelap (North part of village) Rongelap (Northernmpst cistern) Rongelap (Southernmost cistern) Utirik (cistern near church) 9 Mar LO In addition to the above, a sample of foilage was taken at the wind: ward side of Bikar Island, The radiation field was 180 or/hr on 9 March 195) at this point. 8. Conclusios and Recommendations . * eS ae The radiological survey proved that a large yicld surface detortion can produce extremely serious radiological contamination over a distancmore than 120 miles downwind and important contamination about 250 miles dow wind. b. The center of the contamination pattern from the BRAVO Shot Me. sauewhat north of Rongelap and Rongerik Atolls and probably not far froma L between Bikini and Bikar, ¢. Although the fall-out was serious on Rongelap Island located at the extreme southeast tip of the atoll, the emtamination was about ten times greater at the north side of the atoll, twenty miles away. d. The cmtamination decreased by a faotor of about eight over the downwind distance of 50 miles between Rongelap and Rongerik, e. Standard military field housing provides a significant degree at protection to personne] inside, f. The AN/PDR-39 proved to be a very satisfactory instrument for ficld survey work under rigorous environmental conditions, ge A single DDE with two (2) whale boats is not a completely satisfactory method of conducting a broad radiological survey of the type jut completed, Future surveys should consider using vessels capable of entering more of the atolls and of handling a hclicopter and several small boats. 6 Incls: 1, Rad. Survey Rongelap LACOrPI;ED/DOE : a 2. Rad. Survey Utirik 3. Rad. Survey Bikar 4. Rad. Survey Rongerik 5 Rad. Survey Ailinginae._ -.- /s/ Herbert Scoville DR, HERBERT SCOVUOLE ¢-- Technical Director AFSHP mmpeamanamamaammemamion\ 6. Summary of Rad. Survey> Sggggeneceelggss 4 /