a m te: td fu ot Estimated iacegrai .noie-cody, external zamma doses for the first vr and for i vr. Values include contriburions resulting from natural background radiation of 2bouc °.027 rem for a rirst-vr dose and 0.80 rem for 2 iQ-vr isse. Tor comparison, the Federal radiation suide- line (total of external and internai doses) is 0.5 rem/yr for individuals end 5 rem for 29 -r for a popularion average. These eguide“ines are in addition te natural tackground. Estimated Pattern? doses Description First vr (rem) 30 vr 1 Village on Eneu island. 0.12 2.9 2 Residence in houses already constructed along lagoon road on 3ikini Island. 0.20 4.3 3 Residence in houses already constructed along lagoon road on 3ikini tsland with the following remedial actions taken: 4.1? 4 a. Placing 5 cm or gravel around houses, 0.187 b. . a . 5 . Removing and replacing top 20 cm of soil 0.18 around houses. b 4. oP Residence in Phase II houses constructed along lagoon road within Area 2? or Fig. following remedial actions taken: 2 with the a. Placing 5 cm of gravel around houses, 0.22° 4.8? b. Removing and replacing top 20 cm of soil 0.20° 4.4? 3 Residence in Phase II houses constructed within 0.28 5.9 § Residence in Phase II houses constructed within 0.28 5.9 © around houses. the interior of Bikini Island. the interior of Bikini Island. : See Table 2. Othe exposure rates in the immediate vicinity of the houses have been reduced by a factor of two and eight for remedial actions a and b, respectively. However, we have estimated that only 35 to 40% of the Bikinian's time will be spent in the vicinity of his house; therefore, the reduction in total dose is relatively small because the total dose includes the exposure received from the areas where he spends the remainder of his time. (Patterns 2, 3a, and 3b); the 30-vr Island lead to the lowest external doses (excluding natural background) exposure doses. for these patterns range from 3.2 to 0.093 rem and the integrated 30-yr 3.5 rem. dose of 2.1 rem are neariy one-half Living patterns on Eneu ~13- The first-yr dose of