Work Location: United States In 1974 a groundwater program was initiated at Eniwetok Atoll to study systematically the hydrology and the ground water geochemistry on selected islands of the Atoll. The program provides chemical and radiochemical data for assessment of water quality on those islands designated for rehabilitation. These and other data are used to interpret the mechanisms by which radionuclides are cycled in the soil-groundwater system.’ Because of the international concern over the long-term buildup, availability, and transport of plutonium in the environment, this program emphasizes analysis of the element. The results of the study show that on all islands sampled, small quantities of plutonium radionuclides have migrated through the soil columns and.are redistributed throughout the groundwater reservoirs. The observed maximum surface concentrations are less than 0.02 percent of the maximal recommended concentration for drinking water. Concentrations of $sup 137$Cs are found to correlate with water freshness, but those of $sup 2395,$sup 240$Pu show no such relationship. The mechanisms moving Ssup 239$,$sup 240$Pu through the ground water reservoirs are independent of the processes controlling the cycling of $sup 137$Cs and fresh water. A reasonable linear correlation is found between mean surface-water concentrations and soil burdens. This indicates that the quantities of S$sup 239$,Ssup 240$Pu migrating to the groundwater surface layers are, to a first approximation, independent of the physical, chemical or biological characteristics of the islands. (auth) Descriptors: *CESIUM 137--*RADIATION MONITORING; *ENIWETOK--*WATER QUALITY; *GROUND WATER--*RADIONUCLIDE MIGRATION; *PLUTONIUM 239--*RADIATION MONITORING; *PLUTONIUM 240--*RADIATION MONITORING; *SOILS--*RADIONUCLIDE MIGRATION; Subject Codes (NSA): N44300* Environmental & Earth Sciences-- Radioactivity Monitoring & Transport Subject Codes (EDB): 510300* Environmental Radioactive Materials Monitoring & Transport 10/5/12 (Item 12 from file: Sciences, Terrestrial-- 109) 1096237 NSA-32-027940 Radioactivity levels in Eniwetok soil Gudiksen, P.H.; Lynch, 0O.D.T. Jr. Univ. of California, Livermore Health Phys., v. 29, no. 1, pp. 17-25 Publication Date: Jul 1975 Coden: HLTPA Country of Publication: Gabon Journal Announcement: NSA32 Document Type: Journal Article Language: English Subfile: NSA (Nuclear Science Abstracts); Abstracts); EDB (Energy Database) Work Location: United States ERA (Energy Research Descriptors: *CESIUM 137--*RADIATION MONITORING; *COBALT 60-~*RADIATION MONITORING; *ENIWETOK--*RADIOACTIVITY; *PLUTONIUM 239--*RADIATION MONITORING; *SOILS--*RADIOACTIVITY; *STRONTIUM 90--*RADIATION MONITORING; CONTAMINATION; DEPTH; SPATIAL DISTRIBUTION Subject Codes (NSA): N44320* Environmental & Earth Sciences-- Radioactivity Monitoring & Transport--Soil Subject Codes (EDB): 510301* Environmental Sciences, Radioactive Materials Monitoring & Transport --Soil 10/5/13 (Item 13 from file: 109) Terrestrial-- 1085854 NSA-32-017199 Ssup 210$Po and $sup 239$Pu, Ssup 240$Pu in biological and water samples from the Bikini and Eniwetok atolls Nevissi, A.; Schell, W.R. Univ. of Washington, Seattle Nature (London), v. 255, no. 5506, Publication Date: 22 May 1975 Coden: NATUA ° pp. Country of Publication: United Kingdom 321-323 r 5003520