Table 2.5 Beta Activity in Core Scnples of foil Noe of Teland _ Cores B”/rin/g line 2ine 3ine ine Sine 140 ho ho HDA NDA Utirik 3 1,250 480 2ho 130 100 169 & 25 Roagelap.§ 6,600 2,100 570 20 230 160 200 «150 Lintep|bea. Gine Tine Bins F ine 50 Busch «210,800 7,100 7,200 6,400 6,600 Entactok2 Lebaredj | «57,000 24,000 4,300 18,000 26,000 12,000 11,000 42,000 33,000 23,000 23,000 19,000 Kebelle’ 3 43,000 30,000 10,000 2,000 2,300 Lomita 3 53,000 48,000 25,000 20,000 14,000 1,000 Gejen. - 1 37,000 3,400 Lukuen: @ 35,000 40,000 13,000 10,500 10,000 10,000 Bikar 3 4,000 TO 250 170 120 100 27 “ne a 16,000 7,500 3,000 2,000 1,60 1,100 160 37,000 8,00 3,600 4,000 4,400 16 4,700 100 7 ._ A comparison of Tebles 2.3, 2.% and 2.5 indicates that th? coring vechatgie falls down sarewhat at high levels of activity although th? eppareat rovexent of ectivity may be real end a fimction of the soil perticle size and not a mechanical cross-contaninaticn, - Tha ebove data shorvery definitely that the residual ectivity on tha delanis fg contained primarily in the top several inches of soil end that novexent 4g ocecurrin3z. Data presented in a later section deal with the nature of the conteziration in the environmcnt and froa these it can te detuced that froc‘fonntl® takes place with cetpt ana Rutp29 Qvnuee 10 emeeee eo Cea S7