15 0.3 pCi/g. Nine species of fish were collected from fourBe 66 at Bikini ggell. Of the fallout radionuclides commonly detected ( Co, 137cs, 90sr, and 239,240Pu) iron-55 was the most abundant with vues up to "520 pCi/g of dry weight. Concentrations of 69¢o ranged up to 16 pCi/g of dry viscera from mullet collected near Bikini Island. Most of the other tissues con- tained less than 5 pCi of °4Co per gram. Cesium-137 values were mostly belo, 1] pCi/g, however, the convict surgeon from Nam contained about 4.5 pCi ‘ts per gram, Most of the fish tissues analyzed also contained less than a pti/g of 90Sr and 239,240py. The highest values of 90Sr (2.6 pCi/g) and 239,240Pyu (5.6 pCi/g) were measured in the viscera of mullet from Nam. Other than bers. naturally occurring 40K was the most abundant radionuclide in the fish tissues analyzed. The average gvalug,of this radionuclide was 9 pCi/g versus 47, 2.6, and 0.65 pCi/g for ° Fe, Oo and 13 Cs, respectively. Although coconut, Pandanus, and breadfruit seedings have been planted on Bikini Island, only a few of the plants had begun to bear fruit in 1974 or 1975. Thus, most of the plant tissues sampled were leaves from these young plants. Results of the analyses of the plant samples are given in Appendix Tables 24 and 25. Cesium-137 was the most_abundant radionuclide in most of the plant samples. Concentrations of !37Cs in 15 samples of coconut fronds ranged from 58 to 649 pCi/g (dry) and averaged 154 pCi/g. The highest '37Cs value was in the first Pandanus fruit produced on one of the new plants. Even though it was immature, the Pandanus fruit was picked and analyzed. The inedible portion of the fruit had a I37Cs level of 3,670 pCi/g, while the edible portion had 3,520 pCi of !3/Cs and 255 pCi of 90Sr. Of the plant tissues analyzed 90Sr levels were highest (251 to 446 pCi/g) in the leaves of the new breadfruit plants. Cesium-137 values in coconut Jeaves were usually orgater than the !3/cs5 value in surface soil from the same area. The highest. 7Cs values in plants were not, however, from the areas having the highest 7¢s concentration in the soil. In fact one of the higher 137Cs values was in coconut fronds from the area (Pit #11) which had the lowest 137Cs value in the surface soil. Plutonium-239,240 values were less than 1] pCi/g in the plant tissues sampled and were less than 0.05 pCi/g in the edible portions of the plants analyzed. 2. Soil Both profile and surface soil samples were taken from Bikini, Enidrik and Nam Islands. Most of the samples were analyzed for gamma-emitting radionuclides, 90sr,* and plutonium,* while selected samples were analyzed for °Fe. Results of all analyses, except °2Fe, are shown in Appendix Tables 26 thpough 32 (Bikini), 33 (Enidrik) and 34 through 36 (Nam). the °*°Fe analyses are in Appendix Tables 27, 28 and 37. the soil profiles on Bikini Island are shown on Figure 5. Results of The locations of As found in past surveys on Bikini Atoll, most of the fallout *Some of the analyses for 90sr and Pu were performed by McClellan Central Laboratory, Sacramento, California