It is expected that some individuals on neu Island will receive doses higher or lower than the predicted average dose. from: 1) This may result eating a larger or smaller quantity of food than that shown in the assumed diet, 2) eating more or less of certain foods containing the highest radioactivity levels, and 3) eating foods grown from areas on the island having soil concentrations higher or lower than the average. In this regard it should be noted also that the former " ..Federal Radiation Council suggests the use of the arbitrary assumption that the majority of individuals do not vary from the average by a factor greater than three." This factor of three is used in establishing and distinguishing between guidance for the maximum annual dose to the average individual within that population and guidance for the potentially highly exposed individual within that population. FEDERAL GUIDANCE Radiation Protection Guides for the U.S. were approved by the President and are used by federal agencies in their radiation protection activities. These guides specify the radiation dose that should not 4Report No. 1, Background Material for the Development of Radiation Protection Standards, Staff Report of the Federal Radiation Council, U.S. Department of Health, Education and Welfare, May 13, 1960, pe. 27. 5The "maximum annual dose" refers to the dose in that year in which the exposure of the average individual is greatest, taking into account the buildup and the removal and decay of radionuclides in the body. The majority of the highly exposed individuals within this population are assumed not to receive an greater. annual exposure more than a factor of three