Exposure at the level of the recommended criterion of 0.25 Ren/yr would give twice the above value using a linear dose-effect curve or 3 x 10cases per year. of risk. The Task Group views this as a pessimistic upper linit It could be inferred that there may be between zero and three cases of cancer in 100 years if the entire Enewetak populaticn were continuously exposed to 0.25 Rem/yr over that time period. Lack of confidence in extrapolation of high dose and dose rate effects into the very low dose and low dose rate situation, consideration of the fact that for alternatives being considered for cleanup and rehabilitation, most of the exposure to whole body and in fact to all organs comes from internal emitters wherein the shape of the dose-effect curve is most uncertain, and lack of confidence in the statistics and Fisk eStiuaie drawn cherefron have led the task Group to have serious reservations about their validity. The Task Group hoids the opinion that such estinates can not be used in any definative way to drav conclusions on whether current radiation standards are too high or too lew or as a basis for decision making relative to resettlerent of Enewetak Atoll. While the risk associated with doses at the levei of current standards is possibly not zero, it is viewed as being very low as described by FRC, ICRP, and NCRP. The basic FRC standards, conservatively applied, are viewed as suitable for Enewetak rehabilitarion provided there is also a serious and concerted effort to keep exposures as low as practicable. 44-18