JFFICIAL USE ONL. three main sites (Grand Junction, Monticello and Durango) and extend over a year to include seasonal variations. Participation of state and local public health officials will be invited, and periodic reports will be issued to them and to the cooperating milling companies. Radiation Hazards in the Uranium Mines. The long known association between uranium mining and luny disease was reviewed by Dr. Leonard Sagan, of the Medical Branch. More recent data from the Colorado Plateau relating lung cancer of the oat cell variety to air concentrations of radon and daughter products was also discussed. Recent attempts to utilize these data to establish standards of radon and radon daughter concentrations in mines by both the Federal Radiation Council and by the Department of Labor were mentioned. It was coneluded that although the relationship between uranium mining and lung cancer is firmly established, quantitation of this relationship is not sufficiently understood to provide clearly safe levels. The Palomares Incident. Dr. Bruner amplified certain details of his visit to the Spanish JEN (Junta Energia Nuclear) in connection with the Division of Biology and Medicine assuming its responsibility under the Hall-Otera Agreement. A detailed description was given of the contaminated site at Palomares on the Costa Blanca indicating the areas under surveillance and the total pattern of the research program, As of that time no persons had been found to be contaminated with Pu-238. The contaminated material is not re-suspended but spotty particulate contamination of both the soil and certain plants was reported. The problem is complicated by the presence of natural uranium-radium-thorium alpha emitters; the presence of these necessitates specific identification of Pu-238 by means of alpha spectrometry. The 1967 Resurvey of Bikini Atoll. Messrs. Arnold Joseph, DBM; Tommy McCraw, Division of Operational Safety; and Harold Beck, Health and Safety Lab, New York Operations Office, described a survey of the Bikini Atoll in April-May 1967. The survey was undertaken in response to a request from the High Commissioner of the U.S. Trust Territories to determine whether or not it is feasible and safe to repatriate the Bikini j natives. The primary effort of the survey was to measure radiation levels on each of the istands in the Atoll. Mr. Joseph exhibited slides depicting the varieties and amounts of vegetation and animals now existing; Mr. Beck described the HASL instruments used (ion chamber, gamma spectrometer) and some of the preliminary results achieved with them. Mr. McCraw talked about radiation levels and their variation over the Atoll. The answer to the question of feasibility of repatriation awaits further work of calibrating the several different instruments used both to each other and to measured amounts and distributions of nuclides in soil and vegetation. In response to a question from Dr. Green, this presentation was made for the purpose of informing the ACBM of this development and to make the OFFCIAL USE ONLY