+ 1000 | 3 S Y 100 - | f 4 Messerschmidia 9 Scaevola Tn Y=1.03X\7% om ¥ = 1.29 x0-872 jf o Cc 3 Zc o c 1.0 iw 78 ~~ 5 ~ a a s 4 > 5 oO Cc s “A, oa c —_ .— o 0.} _| 1.0 | i 10 | 100 6 5 1000 C Concentration in indicator plant — pCi/g, dry Fig. 170. the Atoll. Y=0.73X . T A af ye 100 ;— 7 10 _ c 2 Ig U 1,000;- T T 4 Messerschmidia a ——ee—re Scaevola 3 ye — 10, 000 | Qa 10 8 P <a + Es a~ [ 5 Statistical correlation between 1.0 / ‘ O14 1 0.1 4 1.0 | 10 | 100 | 1,000 10,000 Concentration in indicator OSr in rat bone and Sr in Messerschmidia and Scaevola, plant — pCi/g, dry Fig. 171. Statistical correlation between 37Cs in rat muscle and }3?Cs in Messerschmidia and scaevola, Samples were taken using the following three types of equipment: e Ultra High-Volume Air Sampler Air samples were taken on FRED, (UHVS) — 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 at a rate of 2000 m?/hr for a con- be found on the Atoll. 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, (53 day), 40 (1.26 X 10° yr), o4 Mn Typical samples were taken ata (303 day), 957 (65 day), 103 Ru (39.6 rate between 8 and 20 m®? /hr fora day), 10654 (1.0 vr), 125 Sb (2.7 yr), 2395) 137 Cs (30 yr), 144 G6 (285 day), continuous 7-day period. @ Anderson Cascade Impactors (ACI)— (2.4104 yr), 7°8pu (86 yr), and Used to obtain data on the particle- 241 am (458 yr). ‘Be and 7° K size distribution of airborne radio- naturally occurring activities, activity. are 54 vin, 9575 103 Ru, 1062 125o) and 144 a, 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 O.1-1.1, 1.1-2.0, 2.0-3.3, 3.3-7.0, to radioactive decay in the long interval and >7 pm, since testing ended, If-34 Longer-life 1ST ag