17 radionuclides are in the top 15 cm of the soil; however, in some disturbed areas of Bikini Island (i.e., Profiles #1 and N) Significant quantities of some radionuclides, especially?Osr, are found as much as one meter below the surface. The decline of Osy ((figure 6) concentration with depth is shown for a profile in disturbed (N) and relatively undisturbed (#9) areas on Bikini Island, In an undisturbed profile Pu, Am, and Eu values decrease the fastest and ““Sr values decrease least rapidly with depth. The mean concentrations of 137 C5, 90cy., and 24 an and 239,240p,, in the top 10 cm of soil from the soil profiles on Bikini Isiand are given in Table 3. Values in this table are the means of the incremental samples - 0 to 2.5, 2.5 to 5, and 5 to 10 cm - from a profile with the 5 to 10 cm value weighted twice as heavy as the other values. Radionuclide levels are highest in the south-central part of the island (profiles 3, 10 and L) and in the area of the main garden (profile 12). Strontium-90 was_the most abundant act gpye ae fgllowed in gorder of decreasing abundance by 137Cs, 239,240py, 241Am, Co and 125cp, Limited soil collections made on Enidrik Island show a slightly different pattern of radionuclide abundance (Appendix Table 33). Plutonium-239,240 was more abundant than 99Sr at 2 of 4 sites, and 102mpp was more abundant at one site. Radionuclides in soils from Nam werg present in greater quantities (i.e. 90Sr, 1,160 pCi/g; 239,240Py, 637pCi/g; “41am, 470pCi/ag, dry) than on Bikini Island, but the relative abundance of the radionuclides in soi] from Nam was the same as in the soil from Bikini. Iron-55 values in soil from Nam are also higher than in Bikini soil. A sample of noddy and sooty terns was also cone F470on Nam. The muscle of9,80¢ birds contained the following radionuclides: » <0.1; 60¢o, Sr, 0.04; and 40x, 8.5apc isa dry weight. The eggs ot these gices vontained "137¢s (0.1 pCi/g), (0.07 pCi/g). 40K (4.2 pCi/g), 60Co (0.06 pCi/g) and ait: yoke