116 RADIOLOGICAL CLEANUP OF ENEWETAKAq Lt MOBILIZATION MAT. /SUPPLIES PROCURE SHIP EQUIP. PROCURE SHIP DEMOBILIZATION a CLEAN UP CONSTRUCTION BASE CAMP REMOTESITE CLEAN UP TEAM A TEAM B TEAM C ADVANC ARRIVES r FIGURE 2-7, OPERATION SCHEDULE (MONTHS). Containment would be accomplished by mixing contaminated soil, cement, and salt water into a slurry and pumping the mixture through pipes to a tremie barge, then to the bottom of the crater. By keeping the discharge end of the tremie pipe at least | foot beneath the top surface of the previously placed slurry, a monolithic mass would be accumulated, gradually displacing the water from the crater. All contaminateddebris was to be removed from theislands and encapsulated in the slurry during this phase. When the water becametoo shallow to float the barge, the tremie operation would stop andtheslurry line would be held by a crane moving slowly around to form a mound. During the inactive periods in the containment operation, Team C personnel would assist Team B in their cleanup of Runit, the last and largest soil cleanup operation. After all contaminated debris and soil had been contained, a cleanup of the containment site would be conducted to assure that all contaminated material was in the container before the concrete cap was begun. The container would be covered with an 18-inch-thick concrete cap. Once the cap was complete, the stone mole would be grouted with noncontaminated material to provide a structure more resistantto theeffects of the sea.248 The CONPLANcleanup schedule was based on man-hour estimates taken from the Enewetak Engineering Study and adjusted for such factors as weather, radiological safety, and emergencies.249 The concept planners estimated that cleanupofall plutonium contamination over 40 pCi/g on Il