5.6.1 “Dose Estimates Estimates of doses that individuals in the Enewetak Atoll population may incur after they have resettled on the atoll are presented for various alternative programs in Tables 5-6 and 5-7. In both tables, the dose estimates are given for the whole body, the bone (mineral) and the lungs. These estimates are based on information contained in the AEC Radiological , Survey of Enewetak Atoll, NVO-140, 1973 and in the AEC ‘Task Group Report, June 19, 1974. Particular considerations in calculating these dose estimates are: @ e No contribution to dose is assumed from groundwater since it will be monitored and will not be used unless it meets established guidelines for radioactive and nonradioactive impurities. Bone marrow dose estimates are not given because the ratio-of bone marrow dose to the AEC guidelines of 0.25 rem/yr is essentially the same as the ratio of mineral bone dose estimates to the AEC guideline of 0.75 rem/yr. The bagis for this conclusion derives from observing that when Sr deposition is the principal source of bone and bone marrow exposure, as on Enewetak, it is traditionally accepted that the marrow dose is one-third the bone dose, AEC data show that contributions due. to sources other than Sr do not add significantly to bone or bone marrow dose estimates. Consequently, it makes no significant difference whether bone or bone marrow is the organ used for radiological hazard analysis since dose estimates and dose guidelines occur in essentially the same ratio, 3 to l respectively, for the two organs. e Separate dose estimates are not provided for the traditionally more sensitive members of the population (fetus and newborn). The AEC Task Group Report (Tab B, Vol. 2 of the EIS) and .NVO-140, page 505, show that calculations based on the most sensitive individual do not result in significant differences in close estimates. - e@ The dose estimates are maximums expected in the population for an individual free to move about and eat foods obtained within the restrictions of each habitation plan/cleanup action combination, These estimates are developed to provide a means for estimating radiological health effects and risks for each combination of interest. Dose estimates for individuals subjected to more restrictive and adverse combinations of habitation and v 5-31