PLU FO ee, Ue OT a aDO Om Ww é A ) = Ge JAS Sey ck ee cd io realistically consider measuring. This was a general agreement among several laboratories at a recent meeting, although investigatcrs with much less experience in this field believe (mistakenly, we think) that they can measure levels much lower than this. Based upon the average burden of ~200 pCi in Bikini residents stated in your letter, the probability of obtaining meaningful numbers >0 is diminishingly small; and 2. There exists a fair data base on transuranic radionuclides in Bikini environmental samples, much of it published by Nevissi and Schell (1975a 1975b); Nevissi, Schell, and Nelson (1976), and more on hand (Lowman ee? and Schell, pers. comm.). The Enewetak data (Noshkin et al 1976; NVOQs ¢ 140) further provide a reasonable background for extrapolating the Wy , Bikini data into the future and to substantiate whether or not a human \S* AUS contamination situation possibly exists or can be expected in the future. 7) \> The very best data should be summarized, evaluated, and used in the ‘ ys model that you discussed in the third point; however, this higher-quality data will be of little value unless the model used is also of highest quality. Thanks for the opportunity to comment on the meeting proceedings. can make the next meeting. Hope I Senperelys ~¢ oC (Cogito WCLIL: mar Wayne Cf Hanson H-8 Alternate Group Leader Environmental Studies