—NIl4 N -— Ni2 — NIO o~ APPROXIMATE HloH TIDE . 1972 X ow ——N6 \ OCEAN = ~ Eee ~— NB 5 5 SANDBAR - BUILDUP SINCE 1972 | AGUON SALLY — AOMON 5 — 36 5 59 — 510 50m ——Sl2 — 314 — $I6 one S18 FIGURE 7-105. ISOPLETHS ON 137Cs ACTIVITY IN pCi/g (AVERAGE IN TOP 40 CM) FOR ISLAND SALLY