4 Messerschmidia _ © Scaevola YQ 100F | Y=1.08X\7% o ° 7 ¥ = 1.29 x0-872" 4 5 sof 1l0r 8 £ Yo o As Zo 6 ! 1.0 ba = — | | 10 / 4 iy 1.0 PB €o 4 0 © 2 76 0 Concentration in rat muscle — pCi/g, wet ~ om | 100 1000 Concentration in indicator plant — pCi/g, dry 10,000 T 0 Scaevola 1,000} Y¥=0.73X 100 10 1.0 0.11.7 0.1 Fig. 170. Statistical correlation between | 1.0 { 10 | 100 1,000 10,000 Concentration in indicator OSr in rat bone and Sr in Messerschmidia and Scaevola, the Atoll, T I & Messerschmidia plant — pCi/g, dry Fig. 171. Samples were taken using the Statistical correlation between Cs in rat muscle and 187Cg in Messerschmidia and Scaevola,. following three types of equipment: @ Air samples were taken on FRED, Ultra High-Volume Air Sampler (CU HVS) — Used to sample large DAVID, SALLY, JANET, and YVONNE, volumes of air in short time inter- which are islands that include the full vals. range of airborne activity levels likely to Typical samples were taken be found on the Atoll. at a rate of 2000 m?/hr for a con- A number of radionuclides were de-_ tinuous 24-hr period. e Low-Volume Air Sampler (VCS) — tected in the surface air, including "Be Used to sample for extended periods. Typical samples were taken at a rate between 8 and 20 m? /hr fora 106R, (1.0 yr), 1256), (2.7 yr), Anderson Cascade Impactors (ACI)— Cs (30 yr), 144Ce (285 day), 7?9Pu (2.4 x 107 yr), ?38pu (86 yr), and Used to obtain data on the particle- 241 am (458 yr). continuous 7-day period, e (53 day), 9k (1.26 x10" yr), “4mn (303 day), ?°zr (65 day), }°%Ru (39.6 are o4 Mn, naturally occurring activities. 9577 103 Ry 106Ry, 1255) and 1444, size distribution of airborne radio- activity. “Be and 40 K These samplers operated at a throughput rate of 34 m® /hr, are intermediate-life activation and sampled for 7- to 10-day periods, fission products found in current world- and separated each sample into the wide fallout, but present in Enewetak following particle-size ranges: soils in only very reduced quantities due 0.1-1.1, 1.1-2.0, 2.0-3,3, 3,.3-7.0, to radioactive decay in the long interval 7 since testing ended. Longer-life Cs, and >7 um. I-34