PPtugtteets bo ENCLOSURE IV NORWEGIAN MATTER At the request of the Norwegian Foreign Ministry, Dr, John Harley of the United States Atomic Energy Commission, visited the Norwegian Defense Research Establishment in Oslo, Norway, during the spring of 1956 to investigate snow and rain samples that the Norwegians believed contained unusually high amounts of radio~ activity from fallout, Before leaving Norway, Dr, Harley left copies of his evaluation of the radioactivity found in the sampies. On returning to his laboratory at the New York Operations Office of the USAEC, Dr, Harley made a more complete analysis of the samples. He estimated that the Strontium-90 content (the isotope of most concern) in the maximum sample was only one-tenth of a permissible amount for the general populace, or one onehundredth for industrial workers, even if water at this level of activity were consumed over a lifetime, Of course, much higher concentrations could be permitted for shorter times, On May 29, 1956, the Norwegian Foreign Ministry advised its delegation at NATO that there was great similarity (agreement) between the conclusions of the Norweglans, of Dr, Harley and the conclusions They also forwarded to their NATO delegation a brief summary of Dr. Harley's report, conclusions and recommendations, In view of the fact that there was some misunderstanding created by a statement of the Norwegian delegation at the NATO Council, Dr, Harley prepared on June 4 a memorandum clarifying the maximum permissible levels quoted in his original report, On June 8, 1956, the U, S, Department of State cabled the American Embassy at Oslo to the effect that the material which ~ ol = =z, Enclosure IV