P..ini Atoll ishabitants vera moved first to Rongerik Atoll and tnen finally to Kili Island. In 1968 President Johnson declared Bikini Island safe for resettlement. Rehabilitation efforts of Bikini Atoli began in 1969. required persons to reside on Bikini Island. These activities Sy April 1978, the population numbered 143 persons and consisted of caretakers and agriculturalists employed by the Trust Territory plus a few Bikini land owners and their families who found their way back via Trust Territory trade ships. This population remained on Bikini Island until they were relocated in August 1978 to Kili Island in the southern Marshalls and to Ejit Isiand, Majuro Atoll. During the rehabilitation and repopulation years, the medical services already provided by Robert Conard, M.D. and the Brookhaven Medical Team on other atolls of the Marshall Islands were expanded to inelude sick call and body burden measurements on Bikini Islands. in 1974 (CO 75) and in 1977 (CO 77). This team made body burden measurements In August 1977, the responsibility for pro- viding body burden measurements was transferred from the Medical Department to the Safety and Environmental Protection Division (SEP) at Brookhaven National Laboratory. The 1978, 1979 and 1980 body Surden measurements of the Bikini popu- lation were conducted by the SEP organization. This report summarizes all personnel monitoring activities which were conducted on the Bikini Atoll residents from 1970 through 1980. den data along with the reported residence interval, Using the body bur- individual dose equivalents have been calculated and are also reviewed. A. Body Burden Measurements - Radiochemical Analysis of Urine Prior to the assumption of responsibility for the total personnel _ monitoring program by the SEP Division in 1977, analysis of urine samples for