- 55 32-4 yC/KG Is TOP INCH 0 Pigure 14 A. SECOND INCH THIRD INCH FOURTH INCH SAND PROFILE FIFTH INCH SIXTH INCH SEVENTH INCH EIGHTH INCH INCREMENTS Radioactivity in eight increments of a sand proflle taken in Rongelap lagoon off Kabelle island under six feet of water. 20 ' YC /KG 10 5 0 DHORT — HHOKT —— HAMS B56 BIS BHMT BHP BIS BIS BIS PARTICLE SIZE IN MM 4 .989~-1.651 147-589 074-147 <.074 LeBTO ESRES LEBTG SRS REET SORTS DteY “ORY Org Ors Ore one Y BOMRST BIS Figure 14 B. Specific radioactivity in five different particle size fractions for each of the soil profile increments shown in Pigure 14 A. Figure 14 C. = 165! 589-1651 147-589 074-147 O74 074 165! 589-165 147-589 074-147 > = 074 on. 165! Oke B25 589-1651 197-589 074 -147 DHOW Ss BORTS 074- 147 074 0 165! sx 147-589 S 10 074-14 O74 5 — 20 (6m .589-1.651 >70 5 60 g 40 — The highest radioactivity levels are in the smallest particle size fraction in each increment. The percent of the total radioactivity in each incre- ment contributed by the different particle size fractions of that increment. The percent contributed by the two finer fractions increases with depth down to the eighth inch.