100 100 - 7 7 = 4 ~ ”~ ~ — 10 }— T,, = 65CM 4? a = = 4 pCi/gm pCi‘gm of — — 1 1}+— —_"1 L_ . ~ — =— = | = 0.1 0 7. L 20 j 40 ] 60 L B0 ° | 100 [ 120 0.1 DEPTH (CM) FIG 10. '%cs (AVERAGE OF ALL PROFILE SAMPLES ON BELLE) -52- a

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