SUMMARY AND RECOMMENDATIONS The predominant radionuclides in the terrestrial organisms in Bikini Atoll ‘are 131¢5 and gr, whereas the marine organisms contain mainly themumemge 60 Co ( and 22Fe. The range in the amount of a radionuclidé tissue from the same species at the same islet is wide. in the same When detectable amounts of radionuclides are present, the minimum and swessueasauere maximum values often differ by factors of four or five and sometimes by a factor of ten. External radiation levels were measured on all islands of Bikini Atoll as part of the clean-up program. The highest exposure rate was measured on Tare (Eneman) where a low lying algae covered area showed 800 uR/hr. The maximum exposure rate encountered on the islands scheduled for rehabitation, Bikini and Eneu, was about 120 UR/ar in the interior of Bikini. Other islands exhibiting exposure rates greater than those found on Bikini were; Uncle (Enidrik) - 300 uR/hr Victor (Lukoj) - 180 uR/hr William (Jelete) - 150 uR/hr Charlie ( Nam) - 500 uR/hr Fox (Lomilik) - 500 uR/hr be due to 17’cs and. thus the reduction in exposure rate can be assumed to ip q L . wm closely follow the decay of 13’cs. Turning ofthe soil as occurred durjing