Cleanup of Bikini Atoll", January 1972 (Enclosure 11). are reviewing a draft report of the 1972 survey. Principal investigators That report will be published when completed. For several years, personnel radiation monitoring has been carried out on workmen and Bikini People on Bikini by a team from Brookhaven National Laboratory headed by Dr. Conard. During his 1974 visit, Dr. Conard monitored the people on Bikini Island and took samples of the environment. of the 1974 results will also be prepared. A report Preliminary information on the 1974 Bikini survey from Dr. Conard indicates the body burdens of cesium-137 for 18 males and 13 females are very low, about 3-4% of the applicable standard. The addition of coral gravel in the yards of houses appears to reduce radiation levels in the yards by about 50%. to continue such surveys. It is our current plan Our detailed survey plans will, of course, depend upon the actions and desires of the returning people. It is likely that annual field trips will be made initially with less frequent surveys later depending on results obtained. Preliminary data from the latest survey are essentially in agreement with earlier survey findings. derived from the 1967 and earlier surveys are still valid. Exposure estimates Available radiological information is reviewed as each field trip is planned. One change in the atoll has been construction of houses on Bikini Island. One of the objectives of the 1972 survey effort at Bikini was to determine the reduction in radiation exposure that can be expected because of the time people spend indoors. Table 1 of WASH-1273 presents results of measurements made outside and inside the Bikini houses in various stages of 5009585