TABLE 2.4 Beta Activity in Soil Samples Taken From Exposed Soil Profiles Beta Activity (B7/min/g) “te Island Labaredj Kabelle Kabelle Ka belle Otol 12,400 130,000 72,000 93,000 97,000 3 1,500 380 6,800 2,900 440 6 110 950 1,700 400 130 9 140 710 130 2,300 | 240 12 NDA @) 160 40 580 140 18 70 120 10 70 90 24 40 100 70 NDA 30 | NDA 36 -- 40 (a) _ Rongelap 60 40 No detectable activity Table 2.5 summarizes the data derived from the tube coring samples. Cores were analyzed in ]-in. increments and while some movement of activity along the walls of the tube was probable the results for the most part agreed rather well with those obtained by the other sampling procedures. A comparison of Tables 2.3, 2.4, and 2.5 indicates that the cor- ing technique falls down somewhat at high levels of activity although the apparent movement of activity may be real and may be afunction of the soil particle size and not a mechanical cross-contamination, The data in Table 2.5 show very definitely that the residual activity on the islands is contained primarily in the top several inches of soil and that movement is occurring. Data presented in Chapter 3 deal with the nature of the contamination in the environment and from them it can be deduced that fractionation takes place, with Ce!*#_Pr!* and Rul%_Rp1% making up much of the fixed contamination. The plant at — -~8-. ON! _ cx A: fo