-44. Table 4. - DRAE Estimated integral whole-body external gamma doses for the first year and for 30 years. Values include contributions due to natural background radiation of about 0.027 rem for a first~-year dose and 0.80 rem for a 30-year dose. For comparison, the federal radiation guide (total of external and internal doses) is 0.5 rem per year for individuals and 5 rem for 30 years for a population average. These guides are in excess of natural background. ‘ Estimated doses (rem) Case 1 _ Description Village on Eneu Island 2 ' Residence in houses already constructed along lagoon road on Bikini Island. 3 Residence in houses already constructed along lagoon road on Bikini Island with following remedial actions taken: 4 5. 6 First year 30 year 0.12 2.9 0.20 4.3 a. Placing 5 cm of gravel around houses 0.18 4.1 b. Removing and replacing top 20 cm of soil around houses . 0.18° 4.0 Residence in Phase IT houses constructed along lagoon road within area 2 of Fig. 7 with following remedial actions taken: a. Placing 5 cm of gravel around houses 0.22" 4.8° b. Removing and replacing top 20 cm of soil around houses 0.20% 4k Residence in Phase II houses constructed within the interior of Bikini Island 0.28 5.9 Residence in Phase [I houses constructed 0.28 5.9 ‘within the interior of Bikini Island “The 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 other 60 to 65% of his time. ian a