— . UNCLASSIFIED Por Vii Biology and Medicine PROJECT SUNSHINE (UNCLASSIFIED) igh ce” oe Monitoring and sampling of worldwide radioactive fallout continued throughout the quarter. The Health and Safety Laboratory of the New York Operations Office prepared a report which brings together all the data that have been obtained on the deposition and uptake of fallout since systematic monitoring and sampling began.* The data on gummed film,surfaceair monitoring, Pacific Ocean water, and human bone sampling are only summarized in the report because they comprise hundreds of thousandsof individual stings. However, the detailed in- Leo. a 33 aes formation is unclassified and available to anyone. . .a pager’ he . é: at = vip tpnelbe ey _ an wee ~ Stratospheric Monitoring . . Table 1 summarizes the results of analysis for strontium 80 of stratospheric samples collected during the period November 1956 through January 1958, based on data available ° Table 1—-Average Concentrations of Strontium 90 in Stratospheric Samples Collected November 1956 through January 1958* . (Strontium 90 content expressed in micromicrocuries per 1,000 cubic feet of air, Minneapolis, Minnesota Altitude (feet) : Average Number strontium 90 of content s2mples San Angelo, Texas Panama Canal Zone France Air Force Base Number of samples Sn ie OMe mals reduced to standard conditions.) Sao Paulo, Brazil Average strontium 90 content Number of samples Average strontium 90 Content Average Number strontium 90 of content samples 10 545 14 7245 2 939 11 + : a, t - 90,000 7 3 ‘ 7+10f i 80,000 10+7 8 15410 11 14411 5 1228 14 t Tae 65,000 24415 17 29212 10 29 + 26 6 17413 11 ‘ 5 50,000 945 19 242 10 ~ 0 11 . 53 : * Based on data available through June 26, 1958. Anelyses bad not teen completed on all samples collected during this period. The program calls for one sample a month from each ajtitude at each location. In some instascesz the sample was not recovered. f Range sbows one standard deviation above and below average. Siandard devistions sbown include both errors of *Copies of this report, ‘‘Environmental Contamination from Weapons Tests ~A Compilation of Data Concerning Transport, Deposition, Distribution, and Biological Uptske of Worldwide Radioactive Fallout,”’ HASL-42, were provided to the Joint Committee. The report will be sold by the Office of Technical Services, Department of Commerce. * . 38 | DCE ARCHIVES tot UNCLASSIFIED aa te CH Ee — : Sake 2 These samples were collected in the vicinity of the tropopause and protably do nm represent sirsioapderic concestrations. The 50,000-foot sampling level fs usually belowthe stratorphere a: this Jocation. Net eee + hae metsurement! aod variations In strontium $0 content from month to month 249