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ENERGY RESEARCH AND DEVELOPMENT ADMINISTRATION HEALTH AND SAFETY LABORATORY NEW YORK, NEW YORK 10014 ?06288 James L. Liverman, Assistant Administrator for Environment I think that T T G was most concerned that no one seemed to be looking at all of the data from Bikini and that this might be helpful in estimating the native body burden. I agree with both of these points and believe that either a single lab o r a group of 2 o r 3 people should do a writeup on what is known. We would be happy to cooperate in any way you think that we could be helpful. Some of the problem has been in the HASL urine data where we were uncertain about the levels in U. S. residents subject only to fallout. We appear to be confirming the lower numbers that we first found and these agree quite well with values calculated from our best models. This means that the Bikini natives are either more highly exposed relative to the U. S. or that their urine samples are contaminated. It is our opinion that obtaining 20 liter samples of urine from a native population is a larger effork than could be justified by the value of deciding this question. If ERDA is responsible for the health of the natives I strongly feel tbt their exposure to airborne plutonium is the major criterion. continuous monitors run over a period of a year should give adequate data to discharge our responsibility. It will probably be necessary to make other measurements such as external gamma or dietary strontium-90, but this is a separate problem. It should also be kept in mind that, while we have a responsibility for monitoring the natives, this is a most difficult laboratory to use for experiments. Four to six I have expanded beyond your original question but I think the various portions all have to fit together. Health and Safety Laboratory gGk769