L.5o om. fZaen nole vas c:2sed ‘ith siot- ted 2-in-dcismeter toivvinvicarbonate zipe that "3S exrenced 22 tne soil surface. minimize The nits were rackrilled to imvact cn tne environment. The first nole vas Located near the island center. The saiiniry or the water waS ~easurec with an 7% stvu conductivity probe. Two noles were then drilled on opposite sides or the center hole and the saiinity measured in each. wells, “ater was pumaed from the filtered, and sampled. Radio- nuclides, cajor elemenrs, nutrients, and bacteria were measured at the Lawrence Livermore Laboratory to vdrovide data for water qualitv. PLANT/SOTL [SAMPLING PROGRAM Pursose: The main thrust of the crogram -vas to determine radionuclide concentrations a day and sampled serially to deter- various cepths, The well network is available for resampling. the dynamics of radionuclide cycling in the ground water reservoir and to maintain a surveillance of the water quality. The program operation was fashioned after our Enewetak ground water study, and comparison of the data from both atolls should be espe- etally valuable for predicting the correlate =o determine nuclide soils, and to relate the radioactivity in food species to that in indigenous nonfood species that have the poten= tial to serve as indicator species. The unique information that this survey provided is: @ Soil-to-plant and soil-to-fruit concentration factors for detectable radionuclides, e The relationship between food species and nonfood species at the same location, ® Intra-island variability in radionuclide concentration in On subsequent trips to the aroll ve plan to assess thoroughly to availabilicy to plants in the corai mine changes in water cuality as a function of usage. Zrod species, chese with soil concentrations at Specific wells were Dvumped continuously during in the vegetation, @ and <A data base for assessment of terrestrial food chain transfer of radioactivity from the soil to man for long-term dose evai-~ uation following resettlement of the atoll. Methods and Measurements The sampling program consisted of mechanism and rates of cycling of the the integration of a series of samples constituents in ground water at Pacific of food species with soil profile sam- atolls. ples obtained on an ad hoc, available A complete report on the Bikini and Eneu ground water sampling : , : ° 8 and analysis has been sublished. / + species basis. All food species growing and bearing fruit on Bikini