Da a cEesha Sa el ck ta < : a - 10 in the surface soil samples from Wotho. Ailiginae Atoll Samples of soil, plants and fish were collected at Ailinginae Atoll in December, 1974. All samples were analyzed for gamma; emitting radionuclides and-selected samples were analyzed for 7¥Sr and 239,240pu. The results of these analyses are shown in Appendix Tables 7 ‘soi1), 8 (plants), and 9 (fish). Six fallout radionuclides, 60¢9, W37c5, W55ey 24. am, Pu, and 30sy were easily measured in the scil samples from Ailinginae. Maximum values for al] of these radionuclides were found in surface soil sett#1 from, Ug chuwanen. These values jn peta of1 bYweight were as abea 155eu (2.$}, 8 (0.9) | 3s (44) 95240py (7.1) and i this and other samples 137Cs aa"9 adene the most rbundone radiowuet ides. Values for these two radionuclides were usually between 1 and 10 pCi/g and their ratio within a single sample was usually near 1. The mean value for 239:240py in the five surface samples analyzed was 3.5 pCi/g. In the plants from Ailinginae 40x was the most abundant radionuclide averaging 12 pCi/g,while !37Cs was the fallout radionuclide present in the highest concentration ranging from 2.9 to 15 pCi/g. Strontium-90 was the only other fallout radionuclide which was easily detectable in all the samples. Values for 90Sr ranged from 1.6 to 7.1 pCi/g of dry weight and averaged 3.5 pCi/g, dry. Plutonium was not detectable in the single plant sample analyzed. Five species of fish from Ajlinginae were analyzed for gamma-emitting radionuclides and 90Sr. Naturally occurring 49K was measured in all the samples Ap concentrations ranging from 0.5 to 10 pCi/g of dry weight. Cesium 137 and ©YCo were the only fallout radionuclides detected in more than 50% of the samples and all values were less than 0.4 pCi/g. Strontium-90 values were Jess than the detection limits (0.1 to 0.8 pCi/g) for the method of analysis and sample size we used. Two coconut crabs were collected at Ailinginae. jevels were almost equal. Osr values were less than 0.5 pCi. and 42 pCi/g. Potassium-40 and 90s). In the muscle !37Cs values were 12 pCi/g while The exoskeleton had 90Sr levels of 22 The two edible hepatopancreas samples had 13/cs levels of 3.1 and 12 pCi/g,but 90sr values were 0.3 pCi/g. Rongerik Atoll Soil, plants, and fish were collected on and around Eniwetak Island, Rongerik Atoll, in November 1974. All samples were analyzed for gamma-emitting radionuclides and selected samples were analyzed for 90Sr and/or Pu. Results of the analyses are given in Appendix Tables 6 (coconut crabs), 8 (plants), 9 (fish), 10 (soil) and 11 (soil). Of the seven fallout radionuclides commonly found in the surface soil samples ! Cs and 7¥Sr were present in the ry sgil concentrations. Cesium- 137 tes 19 ranged from 1.9 to 55 pci/o.of dry Sg , while 2USr values ranged from 7 to 35 pCi/g., ayean gh2 tues for Cs and 2 ie were 19+16 and 18+11 pCi/g, respectively. The '37cs/99sr ratio for ithe surfage samples in Appendix Table 9 was 0.90.3. Plutonium -239, 240, 24lam and Eu concentrations for these six samp1§5 averaged 3.9+2.5, , 240, and 1.9+1 pCi/g, respectively. Cobalt -60 and '25sb values were less than 0.9 pCi/g (dry). DOE ARCHIVES