SLIDE 44 Environmental levels of radioactivity. BNL personnel commenced limited environmental monitoring of the Marshall Islands for radioactivity in April 1974, Since then, members of the staff have made a number of field trips to the Marshall Islands to collect a representative cross-section of vegetation, animals, fruits, soil and water found on the inhabited islands for the purpose of assessing the activity intake by people. The surveys covered Kwajalein, Wotho, Bikini, Rgngelap.and Bygrik Atolls. In general, all samples were analyzed for “~Sr Pu, gamma emitters which may have been present at the time of analysis. Pu and any The specife activity per unit dry weight. 9f foods, rush and soil are given here. The predominant activities were Sr and Cs. The activity ratios between islands were based on thousands of measurements and apply to all nuclides. ENVIRONMENTAL LEVELS OF RADIOACTIVITY MID 1970's Bq g' Dry Weight Description Bikini Pandanus Fruit Scaveola Leaves Soil Coconut Meat Sr py 8.7 3.4 0.019 0.0093 2.0 —_ 0.052 —_ BIC, 15 14 2.9 3.5 Activity Ratio Bikini / Rongelap Bikini / Utirik 47 4 20 Co 0.61 — 0.048 —_ 241 Am _ _ 0.27 —_