Eneu_Island Ground water samples will be collected from the well in the camp area. . Additional water samples will be taken for V. Noshkin, Lawrence Livermore Laboratory, at his request. Limited collections will be made of coconut and other available plant material which is relevant to the Marshallese diet. If time permits, beta dose rates will be determined at selected stations by direct beta counting and absorption measurements in the field. Bikini Island Ground water samples will be taken from the USGS well and from the new (1975) wells where possible. LLL per their request. Additional samples will be collected for A pooled sample of catchment water will be collected from the houses in the village area. Sediments will be collected from catchment bottoms where possible for analysis for resuspended radionuclides, particularly alpha emitters, which may have been deposited on the roof tops and subsequently carried into the cisterns by rainwater. Samples of deposited dust will be collected from the houses for analysis for resuspended alpha emitters, The cistern sediment and house dust samples are expected to provide a qualitative indication of the mobility of soil alpha emitters. Fractionation of plutonium and americium bearing particulates during soil resuspension and redeposition may be inferred from differences between their specific iae pe & a qt = activities and those of near surface soil samples taken in the 1975 survey.