ee 134... RADIOLOGICAL CLEANUP OF ENEWETAK ATOLL With the selection ofthe in situ method, the radiologicalplanningiggy, shifted from the numberof soil samples per unit area to how manyin Sity measurements were needed and whatsize thein situ field of view shoulg be. In developing the OPLAN, the issue was resolved by specific ERDA decisions. Measurements would be made at a specific height and on a specific grid spacing. Raw data would be converted to plutonium concentrations using a consistent set of reasonable assumptions, and the resulting numbers would be related to the revised soil cleanupcriteria. (See expanded discussions in later chapters.) OPLAN development indicated that the cleanup would require More people, more time, and more moneythan previously estimated.323 While the CONPLANestimated 600 military personnel, the OPLANcalled for 866. In the CONPLAN, it was estimated that the project would take 28 months from D-Day, while the OPLAN developers estimated 34 months. Time estimates for camp construction and demobilization in both plans were furnished by 84th Engineer Battalion personnel; however, Planning factors had changed considerably since the time the CONPLAN had been developed; i.e., tents and prefabricated buildings were eliminated in favor of more permanent facilities. Some of the additional time was required to construct additional billeting and recreation facilities required to supporta population of 443 at Lojwa Camp, 122 more than estimated in the CONPLAN.324 Additional construction time also was required because the many prefabricated units anticipated in the CONPLAN were not available. All but a few facilities would have to be constructed using standard building materials.325.326 Too, some activities which were previously considered as part of the cleanup were redefined as demobilization functions. There was an anticipated 3-month delay in availability of ERDA radiological support (15 September 1977 rather than 15 June 1977). In order to accommodatethis delay and the delay in availability of the Lojwa Camp, the planners rescheduled mobilization and cleanup activities. Northern islands debris survey and removal were rescheduled to begin prior to, instead of concurrent with, contaminated soil operations and southern islands cleanup.327 Three alternatives for determining D-Day were considered: a. D-Day of 15 June 1977, with mobilization actions as scheduled in the JCS-approved CONPLAN. b. D-Day of 15 June 1977, with modifications to the CONPLAN schedule of mobilization actions to accommodate the delay in ERDA radiological support and Lojwa Campavailability. c. Deferral of D-Day to accommodate the delay in ERDAradiological support and Lojwa Camp availability while maintaining the CONPLANschedule for mobilization actions.