»” FIGURE 8-27. PLACING CEMENT IN KEYWALL FORMS. Eighty percent (40 sections) of the keywall located on the reef was complete when tremie operations ceased.8! At this point, the total amount of contaminated material to be contained should have been known, the configuration of the dome determined, the location of the remaining keywall staked out and all surrounding material within the dome area removed to an elevation of 10 feet.82 Instead, because soil cleanup began late, there were only 3,500 cubic yards in the stockpile and the balance to be contained was unknown. At the 12 February [979 Fission Products Survey Conferencechaired by the Director, DNA in Albuquerque, conferees were briefed on current project status (Figure 8-28) and advised that soil-cement operations would begin soon with less than 12,000 cubic yards of soil remaining to be contained from the islands other than Runit. It was estimated that there were between 18,000 and 42,400 cubic yards of soil which might be excised from Runit, more than enoughtofill a circular dome up to 30 feet in height. The Director, DNA initially decided to proceed with cleanup of Runit to 160 pCi/g, but subsequently requested that an optional plan be developed for cleanup of Lujor soil to 80 pCi/g, concurrent with the Runit cleanup.83 The options were discussed further during a visit to Enewetak by the Commander, Field Command on 16-21 February 1979, including options for the shape and configuration of the dome. However, no specific decision on the shape was made.