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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.