LAWRENCE LY GRMORE LAECHATORY . oy. . + be ST June 7, 1973 Dr. Nathaniel F. Barr Asst. Director for Measurement and Evaluation Division of Biomedical and ‘ Environmental Research U. S, Atomic Energy Commission Washington, D.C. 20545 Dear Nat: Enclosed are xerox copies of viewgraphs used at the RARG meeting in Livermore last month. They are for your own use or for distribution to anyone whom you, as chairman of the RARG, consider appropriate. All users, however, should understand the following points: 1. These are viewgraphs used during an oral presentation and, as such, present only an outline of procedures or a come pression of data without amplifying or clarifying discussion. They are therefore an incomplete representation of the work that is being done. 2. Experimental data are preliminary and subject to change as analytical results become final. 3, These are all working documents that are being used in the evolution of the Survey Final Report and will, I expect, be used to generate the AEC recommendations, They are forwarded to you for information only, and are not for quotation in any public document or forum. . A Sincerely yours, Dr. W. E, Nervik Radiochemistry Division Leader WEN: sa ec: T, McCraw D. Wilson W. Nervik/File Unversry ofCaltara PO Box 608 Livermore Catiorna 94559 0 Teiepr ane (415)}447-1100 © Telex 34-6407 AEC LLL LVMA D Twy 910-386 8339 AE