t ’ September 28, 1979 -2- “Mrs. Ruth Van Cleve Although the data base for the potential exposure estimates is not yet complete (e.g., the island of Lujor had not yet been factored into the dose calculations), it is not expected that additional information will substantively alter the exposure estimates; should this occur, however, we will immediately inform you. The calculated radiation exposure levels for living only on Enewetak, Medren and Japtan islands are: Maximum Individual 30~Years with imported food 17 millirem/year 100 millirem-bone marrow 69 millirem-whole body without imported food 24 millirem/year 220 millirem-bone marrow 120 millirem-whole body If it is assumed that 15% of their time is spent on the northern islands, and that 10% of their total intake of coconut meat/milk originates from the coconut trees of the northeastern islands, the calculated radiation exposure levels are: Maximum Individual 30-Years with imported food 28 millirem/year 250 millirem-bone marrow 200 millirem-whole body without imported food 51 millirem/year 460 millirem-bone marrow 270 mitlirem-whole body For purposes of reference, it may be recalled that U.S. exposure criteria are: Maximum exposure to an individual fn any one year: Integrated 30-year exposure level: 500 millirem 5000 millirem Because of the uncertainties and assumptions which are inherent in deriving radiation exposure estimates of this nature, the Atomic Energy Commission Task Group report recommended the following exposure limits for planning and cleanup purposes: Maximum exposure to an individual in any one year: _ Integrated 30-year exposure Tevel: AMOS a era gh rae 1 250 millirem 4000 millirem RE gerne cenore Teeens . Hoy a4, ‘7 ween oF .