—}a7 SUMMARY 1. Surveys were made in 1954 to 195d to geographical limits of the the teets in the contral 2. adiocactive contamination from Pec: fic Ocean. Collect:ons of biological samples and soils were meade at one test site 3. determine the islans (Bikini) and ten off-site’ islands. The gross beta radivcact.vity decreased with Gietengs from the test site: 16 1395¢ and 1998 islands whithan a 130mile radius contained at least ten times ag.gech radiocace tivity as the other islands. 4. The levels of radioactivity also were related toe Girec- tion from the test site. In 1955 the islands ts the east contained hijzh levels of radioactivity. Tarawa. Im 1956 and 19538 1300 miles southeast of the test site, contained very low levels whereas Kapingamaringi, distance to the southwest, appr@@imately the same contained significantly higher arnounts of radioactivity. §. 2r25-N095 and RutY3. 106.pp,103, 106 were the predominant radioisotopes present in the majority of the samples.