Runit (Yvonne) Cleanup and Crater Containment The technicians advised that it would be unrealistic to plan on m 50 cubic yards sustained daily output, even with maximur daylight hours. In July, additional personnel were assigned to th operation to provide two-team, double-shift operations cov daylight hours. At the technicians’ recommendation, Field C procured another spare tremie pump, this one a duplicate of the pump, to replace the spare which had been obtained from excess proved inoperable.65 Equipment problems continued to hampe operations until 26 September 1978 when a master mechanic was | by Holmes & Narver, at the request of USASCH and Field Com: maintain and repair equipment which exceeded USAE mait capability.66.6? The mechanic, Mr. James W.Shively, proved inva keeping the crater containment equipment in operating condition vareity of adverse conditions and continuous personnel turnover. § On 2 October 1978, Navy divers entered Cactus Crater to in: material placed there. The existing surfaces of the material ; even.©? However, core drilling, after the dome had been capped project completed (March 1980), revealed some segregation andlz The segregation andlaitance was probably caused by: (1) placing t during daylight hoursonly, in lieu of 24-hour-a-day operation, (2) pump failures, (3) difficulties in controlling the discharge en tremie pipe; and (4) improper dumping of some oversize mater The POD/Field Command decision to handle oversize m: debris and encapsulate it in the sturry was not a part of the POD | the OPLAN. Lacking specific guidance, the JTG disposed of cont material too large for the tremie pump by bulldozingit in at the ec crater. An estimated 7,109 cubic yards of oversized material were this manner (Figure 8-23).7! When the tremie pump could not load of slurry, the slurry was discharged from the transit-mix tr excavated trenches and allowed to harden (Figure 8-24). The | slurry then was loaded into a dump truck and placed in the cra ‘‘processed tremie’’ method was used only when necessary limited to eight loads per day unless approved by CJTG. 72 Contaminated debris stockpiled on Runit from the other is! placed in the crater during the tremie operation. Slurry was used the material and encase the debris into the concrete mass produc tremie process. Approximately 4,500 cubic yards of contaminat were disposed of in this manner. As the tremie operation progressed and the fill approached th of the water, slurry was placed by both the tremie barge inaccessible areas around the crater rim, by using transit-m (Figure 8-25). Tremie operations were completed on 10 Februar months ahead of schedule. Thecrater was filled to approximat