the location of organic layers in some variability in pattern in the of upper parts of the profiles (see Figs. the profile. 5-9; tends to concentrate radioactivity, Appendices A and B). tions, limited in area, Other loca- can be assigned different "typical" profiles. Because organic matter nonuniform patterns of radionuclide concentration may result from organic In general, profiles from Bikini layers that have been buried recently Island show decreasing activity levels by construction and rehabilitation with depth. activities. In contrast, those from Although it is difficult to gener- Eneu Island exhibit a pattern of alizé about patterns of activity dis- levels from surface to tribution, ct et ee : uniform or slowly decreasing activity depth. total-sampled of the dominant nuclides show a con- The variations seen in the profiles on Bikini may be the result I I TO I sistent 90 Sr trend: and 137, Cs >, To Concentration in mature coconut jeaves — pCi/g dry weight Linear regression line y = 0.1149x% + 1.667 0 [Lo 25 a 50 75 100 Concentration in soil — pCi/g dry weight Fig. the 5. Correlation of concentration of the 9065. 0 in Sr concentration the soil ce om — ay | emt -16ore, a togatan eV eee dw fs Fe ae eee ie 15 the relative concentrations at the . in mature same site. coconut a leaves Loy with