RETURN OF RONGELAPESE of Sr® with time in the food chain (except the land crabs). Although there is obviously a certain degree of uncertainty, the above data and estimates indicate that if land crabs are eliminated from their diet, the estimated future body burden of the Rongelapese would be substantially less than 100 puc of Sr® per gram of calcium. Limiting the intake of pandanus would further reduce the estimated Sr” intake. By means of the continuing medical examinations described be- wnat C4 ) cm7 om) C54 mm yg etee oe low it would be possible to note any tendency 51 of untoward accumulation of strontium—90 with time, and appropriate action could be taken before excessive levels were reached. c. Radiological Resurveys Plans are currently beimg developed for a continuing and long-range program for radiological resurveys on and around the Marshall Islands. The principal objective will be to monitor the environmental contamination especially for strontium—90.