Table 3. Mean -*’Cs and “9Sr Concentration in Aerokoj Coconuts (nCi/g wet weight) Sample 13%es Meat 2.6 Milk 3.0 29S 0.009 SUGAR (LELE) AND TARE (ENEMAN} For all practical purposes these are one island, although marked differences in background levels are seen between the east and west ends (Figure 5). Several nuclear detonations occurred on the west end of Eneman which as a result is only about half its original size. Soil samples were taken at four locations on Eneman where measured backgrounds were 60, 100, 250, and 500 upR/hr respectively. Each sample represented approximately one square foot to a depth af one to two inches. Three main contributors to the gamma exposure rate were identified: ©9Co, !37Cs, and ?92mRh. Although the '°2"Rh component of the gamma spectrum probably contained some !°®Ru-Rh, the concentrations were calculated assuming only !°*™Rh to be present. A wide variation in the relative amount of '7’Cs was seen, but in general the amounts varied inversely with the background exposure rates. Figure € shows the projected decay of the sample taken in the 500 uR/hr background area. The relative amounts of each nuclide are indicated at VO (July 1969). Figure 7 gives the projected exposure rate as a function of time. Two of the samples were also analyzed by radiochemical methods for alpha emitting nuclides (Table 4). gum 5009036 14