kK rye -. ; beter Cops -_ S$ oe. c ly a Orgecad My od Cea zi . Oe vipat joty 24 /% Subjects Outline of report of Program 35 of f.0. 7el To: z Commander Task Group 7.1 Objectives were to measure the amount and distribution of radloactive materials in the fauna and flora on the islands and waters of the Pacific Froving Grounds and adjacent areas. le Pre test surveys were conducted to determine the level of residual “contamination from previous test programs. 2. Marine Survey: During the period of June 11 to 21, 1956 a survey operating on the U.S.S. Walton (D.E. 361) measured the radiation in Plankton, water, and fish samples. Fifty three stations in the area we Yotwoon 1° to 14°W and 159°, to. 166°were covered during’tha’3300mile cruisesa continuous recordof the radiation 4n the! surface waterwas obtained|with a probe. .Flanktonsamples fron oblique tows’to'a depth of 200 meters and vater samples from the surface, 25550, RED) and. 100 meters indicated radioactivity at each station Highest radiation readings 4n planktopesti¢ampherseanpheswere:‘from:‘stationsnnepthose..Biking Atoll. Radiation decreased in amounts around ‘the edge of the survey area. - 3- Algae have been collected on the reefs of Eniwetok and the level of radiation, especially the short lived materials, as pH determined, le Plankton sanples from the deep passage at Eniwetok were obtained. ‘on a three times a week schedule. Such samples should be useful in evaluating the drift of radioactive material from Bikini. | 5e Foods of the native people of Wotho, Tarawa, Kusais, Ponape and Ujelang were monitored.