5.) Personal Monitoring - Whole Body Counting and Urine Bio Assay. Whole body counting and urine bioassay of people ressettling Enewetak Atoll and any future populations at Bikini Atoll is the most direct means to verify 1376. and 90 Sr body burdens and doses predicted in the dose assessments and to determine if any individual receives an inordinate body burden and dose. Residents of Rongelap and Utirik, who have been monitored over the last few years, should continue to be monitored to determine if body burdens are at acceptable Jevels and to assess if body burdens reflect any change observed in the environmental concentration of radionuclides. Whole body counting and urine bioassay should be conducted on a bi-annual basis for residents of Rongelap and Utirik by visiting 1 of the 2 atolls each year. Annual visits should be made to residents resettling Enewetak Atoll! and to residents of Bikini Atoll should resettlement occur. This could be reduced to bi-annual visits after a few years. With populations of the size currently on Rongelap and Utirik, and those projected for Enewetak and Bikini, about 2 to 3 weeks will be required for four (4) people in the field to complete the monitoring at each atoll. E. Other Atolls If other atolls are identified to fall within the scope of the P.L. 96-205, additional costs wil} be incurred to implement the program. Some phases of the program outlined above for Enewetak, Bikini, Rongelap and Utirik will not need to be duplicated in their entirety at other atolls. For example, the research studies to determine the mechanisms controlling radionuclide cycling, the research directed toward reducing uptake and 46