WESeies Se tore=beeenhet een 1.5 m. Each hole was cased with slot- ted 2-in-diameter polyvinylcarbonate Purpose: Pipe that was extended to the soil surface. The main thrust of the program was The pits were backfilled to to determine radionuclide concentra- minimize impact on the environment. The first hole was located near the 4 ‘ island center. ‘ . water was measured with an tn sttu i ‘ : t ' i i The salinity of the conductivity probe. soils, nonfood species that have the poten- Water was pumped from the | tial to serve as indicator species. Radio- The unique information that this sur- nuclides, major elements, nutrients, vey provided is: and bacteria were measured at the e Lawrence Livermore Laboratory to pro- able radionuclides, e a day and sampled serially to deter- e The well network is available for ilaue “Let tee ch ea Intra-island variability in radionuclide concentration in On subsequent trips to the atoll we plan to assess thoroughly a eteSc wee cartLha le tS cote The relationship between food the same location, Function of usage. — cate. bast mete SeEo entre ne . species and nonfood species at mine changes in water quality as a the dynamics of radionuclide cycling the vegetation, and e A data base for assessment of terrestrial food chain transfer in the ground water reservoir and to of radioactivity from the soil maintain a surveillance of the water quality. Soil-to-plant and soil-to-fruit concentration factors for detect- Specific wells were pumped continuously during resampling. and to relate the radioactivity in food species to that in indigenous center hole and the salinity measured vide data for water quality. these with soil concentrations at availability to plants in the coral Two holes were wells, filtered, and sampled. tions in food species, to correlate various depths, to determine nuclide then drilled on opposite sides of the in each. PLANT/SOLL SAMPLING PROGRAM to man for long-term dose eval- The program operation was uation following resettlement of fashioned after our Enewetak ground the atoll. water study, and comparison of the Methods and Measurements data from both atolls should be espe- The: sampling program consisted of clally valuable for predicting the 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 species basis. and analysis has been published. growing and bearing Fruit on Bikini Mmmeep 888956 -~6- All food species