=—— 7. The measured air and water concentrations were all below The highest air concentration reported maximum permissible limits. per cubic meter at Mesquite, was 0.17 microcurles pared with the maximum permissible value cubic meter, tion over 24 hours. averaged , 000087 microcuries per cublie of Nevada, as comper 1 microcurie The highest water concentracentimeter jin the Virginia River Trrigation Canel, was well within safe limits. 8. The only significant fall-out reported in distant parts of the nation occurred in the Troy Albany, Concentration three days after the seventh detonation New York, avea during heavy precipitation. of radloactivity was 100-200 curles per square mile, a dose rate for 13 weeks. of 1 milliroentgen per hour, or .375 roentgens (End of SECRET section.) 9. Collection of fall-outdata (UNCLASSIFIED). spring tests for assembling, collected by were taken special attention was given to procedures evaluating, and the vartous test monitoring groups. to furnish this officers and state Special information promptly to public officials from erroneous public delay. Interpreting fall-out data ' steps health so that possible questions arising speculations could be answered without With the cooperation of the U. S. Weather Bureau, trajectory maps were prepared main portion of fall-out to record from the detonations. Health Service assisted in the the health aspects of the actual movement The U. Important work of fall-out to the pubite. S. of the Public interpreting In addition sctentists at ten Commisseton installations througnout the country were designated as authoritative sources to whom local public health officials could refer for fall-out information. (End of UNCLASSIFIED section.) - 60 - | Part VI seers current During the