Ooo 1? 1. James Garrett, Room 1016 dune 1h, 1956 Division of International Affairs Gordon M, Dunning, Health Physicist Division of Biology and Medicine BRITISH REQUEST ON SOLUBILITY OF FALLOUT MATERIAL The data most closely identified with the problem raised in Col. Stewart's letter is related to the surface burst of March 1, 1954 on & coral islend, Although considerable data were collected on fallout from this shot, including island water activity, solubility studies were minimal and not carried out until 94 months or later after the detonation, These are summarized in the attached table, The solubility of fallout material shortly after a burst would be expected to be somewhat greater, Whereas, the uncertainties in these data ere obvious, they do strongly indicate a very significant difference in solubility from detonations over sandy soils, S!oz00¢ Attachment -

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