Tech Note 19 was devised to estimate activity in the 2.5 - 7.5 em interval from 0-5 cm and 5-10 em data. The method was applied to data for 6-N-2, 8-N-2, 12-BL-0, 14-S-2, 16-S-6 and 16-S-8, and the results are shown in Figures 7-9 to 7-14, respectively. No estimated 0.0625 ha average TRU activity exceeded 160 pCi/g for the 2.5 - 7.5 em interval, and all deeper samples had lower TRU activity. Bellethus satisfied Condition D without any soil removal Final Characterization Figure 7-15 shows the isopleths on the TRU activity on Belle based on final data. Table 7-5 summarizes island average results for 137s, 60Co and TRU from IMP measurements. The island average transuranics value reported in the Certification is 95 pCi/gm for surface soil, and the transuranics classification is Food Gathering. N2—- za BL~-— s2— s6— APPROXIMATE HIGH TIDE LINE, 1972 58— LAGOON BELLE - BOKOMBAKO Si2-—— 50m FIGURE 7-15. SOPLETHS ON FINAL ESTIMATED SURFACE TRU ACTIVITY IN pCi/g FOR ISLAND BELLE 7.3.3 Clara Background Island Clara (Marshallese: Kirunu) is one of the set of six islands that are westernmost of the northern islands. It has an area of approximately 3 hectares, and is very sandy, long and slender in shape, with heavy vegetation. Several scientific stations were put on Clara during test operations. One of these remained until the cleanup, and was removed by blasting, severely disturbing the soft soil The blasting occurred after the initial surface characterization, but prior to sampling for the Fission Product Data Base. Clara had no ground zero sites, but a number of nuclear events were nearby so that it ranks eleventh in total H + 1 hour exposure rate among islands of the Atoll with 3,154 R/h. There were no known or suspected burial sites for radioactive materials on Clara. 222