Order number 940406-165953-13 page 8 34. 36. -001-001 set 5 with 341 of 341 items CLASSIF. CLASSIF. 950. ABSTRACT LEVEL TEXT Secret CATAGORY TEXTRestricted Data Radiochemical separations were made by ion-exchange and precipitation techniques and by gamma spectrum analyses to determine the levels of tungsten-185 on selected biological samples from the Eniwetok and Bikini test site and from the nearby atolls of Rongelap and Ujelang. The isotope was identified by its half life, maximum beta energy and gamma energy. High levels of W{sup 185} were found on plant-leaf and soil samples at Belle and Janet Islands (Eniwetok Atoll), 801. and on plankton collected 155 miles northwest of Eniwetok Atoll during August, 1958. Lower levels were found at Vera, Keith, and Henry Islands (Eniwetok Atoll), Nan Island (Bikini Atoll), on the plankton near Ujelang and Rongelap Atolls, and on samples from the latter atolls. The W{sup 185} appeared to occur as surface contamination with the exception of one fish sample taken at Eniwetok Atoll in which the isotope was found in the liver and spleen. KEYWORD (S) ENVIRONMENTAL STUDIES; TUNGSTEN 185;PACIFIC PROVING GROUNDS ; PLANTS; SOILS; RADIONUCLIDE MIGRATION; PLANKTON; RADIOACTIVE CONTAMINATION; FISHES; RAD TOCHEMICAL ANALYSIS; LEAVES; ENIWETOK; BIKINI ; RONGELAP Item 15 150. REPORT NUMBER UCRL--50000-91-7/8 110. 62. PRIMARY TITLE (M) Research Monthly, July--August 1991 ANALYTIC AUTHOR/AFFIL Moulthrop, P.H. [Lawrence Livermore National Lab., 90. PRIMARY TITLE (A) 72. 710. 371. 34. 36. 950. CA (United States)]; Hall, D.K. [Science Applications International Corp., Hanover, NH (United States) ] PERSONAL AUTHOR/AFFIL Sefcik, J.A.; de Vore, L.; Gleason, K.; Sanford, N.M.; Kroopnick, H. [eds.] CORPORATE SOURCE PUB. Lawrence Livermore National Lab., States) DATE (YYMMDD) 910800 CLASSIF. LEVEL TEXT Secret CLASSIF. CATAGORY TEXTRestricted Data ABSTRACT CA (United