Table 4, Estimated integral whole-body external gamma doses for first year and for 30 years. Values include contribution due to natural background radiation of about 0.027 rem for first-year dose and 0.80 rem for 30-year dose. For comparison, Federal Radiation Guide values (total of external and internal doses) individuals are 0.5 rem for first year and 5 rem for 30 years. for Estimated doses (rem) “e Yoeeriptioy varst-year Z0 vear 1 Village on Eneu Island 0.12 2.67 2 Residence in houses already constructed along lagoon rvvioon Bikini ‘sland, 0.20 4.16 3 Residence in houses already constructed along lagoon road on Bikini Island with following remedial actions taken: 4 a. Placing 5 cm of gravel around houses 0.20 4.04 b. Removing and replacing top 20 cm of soil around houses 0.19 3.87 0.22 4.47 0.21 4.29 Residence in Phase II houses constructed along lagoon road within area 2 of Fig. 4 with following remedial actions taken: a. b. Placing 5S cm of gravel around houses Removing and replacing top 20 cm of soil around houses 5 Residence in Phase II houses constructed within the interior of Bikini Island 0.28 5.59 6 Residence in Phase II houses constructed within the interior of Bikini Island 0.28 5.59 The results of these calculations and a comparison with appropriate recommended guide values are given in Table 4 for each case under consideration. Of course, one nould Keep in mind that these cases are only approximations of the expected living patterns and should regard the results accordingly. The minimum external] doses, as one might expect, may be realized by living on Eneu Island. Estimated values, including natural background, are 0.12 rem during the first year and 2.7 rem over 30 years. A significant fraction of these values is due to exposure received while visiting other islands having higher contamination levels. Future inhabitants of the existing houses constructed along the lagoon road on Bikini Island, case 2, may expect to receive firstyear and 30-year integral doses of 0.2 and 4.2 rem respectively. Remedial actions, cases 3a and 3b, reduce the 30-year values by a few tenths of a rem. These values would increase somewhat if the Phase II houses were constructed within area 2 of Fig. 4, cases da and 4b, due to the higher gamma exposure rates measured in this area. other hand, If, on the the Phase II houses were built within the interior of Bikini Island instead of along the shores, cases 5 and 6, one would expect the external dose levels to increase -8-