- ey . yids .055 100 90 A - Belle soil - top inch 80 Activity 70 - 60 L 50 Z August 20, 1958 B - Belle soil - 8-10" depth Hioel41 ppl42 August 20, 1958 134 145 ¥ Zr95nb99 4o T 30 20 .76 Rul03Rp103 Ryl06R,106 Jt 498 “315 ‘ i rie te 10 I 1 Fig. 7. I 2 ! 3 Pg ES 4 MEV 5 .6 7 wo .8 Gamma spectrum curves of Belle top soil and of soil taken at a depth of 8 - 10 inches. ‘The W185 peaks were arbitrarily equated to illustrate the greater relative amount of W185 at depth in relation to the other isotopes.

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