xT of the above procedures some ground crew personnel might exceed the established test limit of 300/mr/week or 3.0 total, We will keep careful records, however, and insure that no individual receives dangerous dosages of radiation and feel confident that by using these new procedures during PLUMBBOB we will accomplish the dual purpose of sponsoring a more realistic attitude toward exposure to radiation within the Air Foreeand simplifying and economizing test operations." Immediately following receipt of the above communication, Dr. Plank of Los Alamos conferred with Colonel Kieffer and advised Dr. Graves, in detail, concerning the conversation, - I found that Kieffer simply could not understand the philosophy which regards every radiation exposure as. injurious but accepts minimum exposures for critical jobs. « « I find Kieffer's approach to be extremely discouraging, I would like to recommend that he be informed of the following facts of life: @e That the aircraft are assigned to support our requirements for bomb cloud sampling and would not otherwise be participating in test operations, b. That there would appear to be no reason why their use in sampling should be required to support some Air Force objective , particularily when it is clear that the two purposes are not compatible, c. That the ARC Test Manager supports a philosophy . of minimal exposure for critical jobs within limits established by competent scientific authority, ad. That all of the precautions have been found to be necessary for the operational management and accurate technical control of the radiation exposures of the people concerned. ee That our experience indicates that the discard of any of the precautions is a movement back toward our SANDSTONE experience in which people were, injured, and 237 SWEH -2-003), ( AFWULsHe a ay eee