was determined, each fish and clam tissue sample was dried in ovens at 90°C to constant dry weight and dry ashed in muffle furnaces at 450°C for approximately The grey-white ash was then homogenized and placed. in suitable counting 72h. In some instances the samples were too small to achieve suitable containers. counting efficiency and were stored for future analysis if needed. All samples (except the filtered water) were first counted on Ge (Li) gamma A large number were split; a fraction was retained at LLNL and spectrometers. the remainder, sent to a contract along with blanks, duplicates, and standards, laboratory for analysis. and groundwater prepared for operations. animal, vegetation, samples were analysis collected during the The number of total listed in Tables 2 and 3. fish, clam, from the Northern samples 12 sediment, atolls Marshall and 2 Islands that were prepared Duplicate samples sent cistern water, islands survey and field for analysis are for analysis are listed in Table 4. The terrestrial samples are summarized according to major category, atoll, and island in Table 5. and island appears A summary of fish and clam samples arranged by atoll in Tables 6 to 8. The water and sediment sample summary appears in Table 9. A more detailed breakdown of plant, animal, fish, and clam samples by atoll and island is accompanied by listed in Tables 10 through 36. a figure islands (Figs. 2-16). showing the atoll The summary for each atoll is and code letter and numbers for Thus, it is possible to determine the number of samples collected at various regions of the atoll. SUMMARY OF RADIONUCLIDE ANALYSES We analyzed most samples for 906. samples 238 Pu and 241 Pu were also 1376.6, measured. 23942405 and Gamma-spectrometry 24 lane In some measurements were made on all separated samples at LLNL using a variety of Ge (Li)-diode detector systems. Counting times were sample. 14 usually 1000 min or longer for each “Eye Over 5400 soil, sageR SUMMARY OF THE COLLECTED SAMPLES