Table 17 represents the exposure rate at each pattern of activity as lisced in Table 16 calculaced assuming 100% occupancy fer Rongelap Atoll. Table :8 presents an estimate of the exposure rate fcr each age group, weighced by the percent of time spent in each area for inhabicants of Rongelap Atoll based on the Lawrence Livermore lifestyle Model (3.4 . Summation of the exposure races in each area provides che average exposure rates to che Rongelapese. Using the average hourly exposure rates, culated, che long term external dose was cal- These data, presented in Table 9 for Rongelap Atoll, have been cor- rected for background (terrestrial and cosmic) radiation by using the average exposure rate of Wotje and Afluk Atolls as a representative sample of she normal Cunexposed) Marshall Island environment. We feel that this {s a very conservative estimate for Rongelap Atoll since the people rately visit the more heavily contaminated islands in the north, and tend co restrict their "orher islands'' visits to the southern sector where exposure tates are similar to that on Rongelap [Island itself. This observation was supported by an independent Living pattern assessment from which data became available in the fall of 1977 (5). Specific living pattern information for Rongelap was obtained on a field cria in October 1977 (5) This information its oresented in Table 20. it should 5e noted that as creviously mentioned, the Rongelap "lifestyle" involves very little time away from Rongelap Island where a constane exposure rate of 7.3 JR/nhr is Revised external dose oredictions based on the observed Rongelap Living cattern are g given in Tables 21, : 22 and 22 These doses include corrections £ 2 assumed. r 237 Cs and 60¢5 which are responsible for 209% of the coral hvsical decay ans d for P external exposure rate above background. The cesium and coba.c ratios vere cofained using the averages of soil sample activities Vniversity of washington ‘LRE) t= + from analyses by 3NL (4° and tre - was assumed for this assessmen= <nac 710 radicnuciide loss nechanisms are operat::e other than physical decay.