FIGURE 6-16. AOMON CRYPT AREA NEAR JOB COMPLETION. The last few sheetpile are being removed. Backfill material came from the beach in left foreground. The PACE area in the background has been totally recontoured, (June 1979) The last actions at the Crypt included backfilling the entire area with clean beach sand from Tilda, removing the sheetpile (Figure 6-16), then core sampling to verify the material near the surface met criteria. Locations of post-backfill coring are shown in Figure 6-11. The largest TRU values obtained from the 5-foot cores were 2.9 pCi/g from within the sheetpile area and 42.4 pCi/g from the location of Excavation Site 1. 183