= UNCLASSIFIE nn er Se ©on This report summarizes the results to date of warious investigatio yndertaken by the Health and Safety Laboratory on Project SUNSHI The basic purpose of this report is to present new data on the distribution of Strontium-90 and this, to the best of our ability, we haveldons. However, data are only useful when they serve as the basis fer intirpretaticns and conclusions. We are comelled to point out that the dath are as yet relatively few and the conclusions mst therefore be regardid as tentative, more so in some areas of the report than in others, SCOPE OF WORK AND PRINCIPAL FINDINGS e specific questions which the Laboratory attempted to answer, the Mecthods of study and the principal findings can be summarized as fbllows: ‘le DATA FROM THE GMD PAPER NETIORK ENABLE A SATISPACIORY Sr59-90 PALIOUT TO THE EARTH'S SURFACES? ¥ethod of Study MATE Principal Findings oT FTChita ae ples of soil from i BATRA ive locations in the SHAH Jnited States wers Na analyzed for radioactive trontium, The results Ye NN cunts of radioactive “tg ero compared with the yur qT SRI ERE & trontium predicted by fallout measurements. & rt : Ni ‘4 2 tt RETRAIN fF q ff ‘So, HEE 3 Beppo x HH o = mnt r AWE F = > 1 tact ; BA HA cd i stssthis aM ee eae(st Tee leh | slataiell abated a | ACHE RaePd HEE SartPee: pee feyt e 0./ 0. & 0.3 PREDICTED TOTAL Srl Gy 1 0.4 VGH.S0/L) = ——ooos a agile 2 Paceratteaea ile Slt 003 oy