the decay curves for these islands with that for Bikini, it can be seen that within approximately ten to fifteen years only Eneman will] have an external background higher than that of Bikini. It is recommended that a re-survey to verify this projection be conducted in about ten years in anticipation of unrestricted use of the atoll. In the meantime, the recommendation of the Ad Hoc Committeethat occupancy of the above islands be limited to visits of short duration should be followed. The remaining islands of the atoll are lower in radiation levels than Bikini and should not be restricted against continuous occupancy on that basis. This is particularly true of the Oboe (Aerokoj), Peter (Aerokojlul), Roger (Bikdrin) complex where the lowest levels on the atoll were found. In addition, coconut samples from Aerokoj were lower in 137Cs and 90Sr content than those from Bikini or Eneu. development of these islands should be encouraged. Agricultural While the external levels on Sugar (Lele) are as low as those on the other three islands, the fact it is contiguous with Tare (Eneman) would make it advisable to restrict the use of this island at the present time. The causeway joining Lele to Bikdrin makes a logical dividing line for indicating this restriction. Sampling of food items presently growing on the atoll indicated mean concentrations of !37Cs and 99Sr which are essentially in agreement with those obtained in 1967. It should be pointed out that the planting of new species of foods on the islands will require additional sampling at the time of their reaching maturity in order to assess the potential internal dose. and McCraw (6) Internal dose estimates have been performed by Gustafson utilizing the 1967 data and would appear to be valid for the 1969 data as well. As a result those computations have not been repeated here, The concentrations of 2°Sr would seen to be of greatest concern with respect to internal dose. In this regard the recommendations of the Ad Hoc Committee for removal of top soil from the site of newly planted pandanus and possibly breadfrujit trees, and the addition of a calcium supplement to the diet should be most effective in reducing the dose due to 2%Sr. 38 (5)