art fore concentrated on those populated atolls indicatirg gare then 10 ar/br at E plus 24 hours and which were not evacuated. Por this pure a pose a special survey was set up under the technical direction of Dr. Thomas N. White, H Div, LASL, assisted by Major Robert Crea, By JTP SEVEN, to start from Ewajalein on 5 March by FSM, Following the survey under Dr. White and Major Crea, the next effort was directed toward acquiring data on the evacuated atolls ina order that the effects of the radiation could be better evaluated. The investigation included ground monitoring and the taking of soil and water samples from living areas. Secondary purposes were efforts to reduce the adverse impact on real and personal property of the Lasty departure, to determine radiation data of scientific interest and to eveluate the time of reoccupancy by the former inhabitants. This ef= ( VON fort was assigned to a destroyer in order that working parties would have a floating base for operations ashore and decontamination facilities afloat, The technical direction of the effort was placed under the supervision of Dr. Earbert Scoville, Technical Directar, irmed Porces Special Weapons Project, assisted by representatives of CASTLE Project 2.5a. The rehabilitetion partion of the effort was placed under the supervision of the commanding officer of the destroyer. The party with equipment departed 7 March for Kwajalein to join with the Trust Territory representative in a FSM rendezvous with the destroyer at Rongelap early morning of & March, Co) Arrangements were made to air ship soil and water samples to BRealth and Safety Laboratory, AEC, New York Operations Office, Attention Mr. Merril Eisenbud. Mr. Eisenbud was requested to provide the task force with decay information and activity per unit area on the soil samples and activity per unit volume on the water samples. He was also requested to make such other analysis as he thought necessary considering the umsual circumstances and interest in BRAVO Event. Detailed reports by Dr. White, Dr. Scoville and Major Crea have- been distributed separately to interested agencies. Contimiing surveys of the evacuated atolls have been made for picking up of enizals for med- ical studies, rehabilitation and for studies of marine life. Reports on » these activities will be included in the above distribution as they becone available. 7 / ” 6 Incl 1. RadSefe factors Considered at the Wea RadSafe Comrand Erief- RICEARD &4. EOUSE Lt Colonel, USAF ONewe Chief, Tech Ops Branch, J=3 ing. 2. Memo for Record: witb 6 Incl covering RadSefe Briefing material as presented at Cmi Briefings for BRAVO. 3. Discussion of Off-Site Fall-out. -- See 4. Cloud Tracking Operetions. 5. Mi: Protection of Transient Shipping During Operetion CASTLE. 6, Analysis of Fall-out Following BRAVO Event with 4 Incls eer “= , .