ns p Operatio Soil Cfeanu was completed, the western area was reexcavated and the enclosure was sampled again. Approximately 1,200 additional cubic yards of bottom e excavated from this area and removed to Runit. soil wer excavation within the enclosure was complete, DOE-ERSP Aner that the 14 areas (Figure 7-35) which had required additionalsoil reques | be covered with a stabilizing soil-cement mixture to prevent the remova f any of this contaminated soil to the surface. Thesoil-cement was prepared outside the enclosure by mixing cement with backfill sand ‘aproximately four bags per cubic yard). The soil-cement mixture was (app migration oO laced on the bottom with the clamshell. The clamsheil was carefully ne alled by a guide who directed the crane operator to place the mixture er the 14 points as precisely as possible. Subsequent investigation revealed that the soil-cement mixture did form a rigid coating. Upon the completion of placement of soil-cement mixture, the final backfill operation in the sheet pile enclosure began. AOMON CRYPT RADIOLOGICAL SUPPORT While the established radiation protection program was adequate for a large portion of the excavation operation, certain aspects peculiar to the excavation required special attention. Enewetak Standing Operating Procedure 608-14, Radiation Safety at the Aomon Crypt Excavation Site, was written to address the special requirement. The Aomonhotline, which was near the crypt, was manned bynot less than two FRST members. The FRST operated a standard hotline point at the Bijire end of the causeway, employing standard radiological safety and control procedures. When operations were underway, a FRST member was always present to insure \hat appropriate radiation safety procedures were being followed and to monitor personnel, equipment, and debris for radioactive contamination. An additional FRST member was also present whenever drilling operations were underway. Becausethe soil and debris were saturated with water upon being removed from the crypt, protective masks normally were not required during excavation. However, when the drier soil was being moved from the crypt area to the stockpile and from the stockpile to the Cactus Crater, additional precautions were taken, such as requiring the dump truck drivers and bucket loader operators to wear protective masks. Air sampling was done in accordance with established procedures, with five air samplers being used: one at the Aomon hotline; one downwind of the temporary soil stockpile in the crypt; one downwind on Aomon;and two in the area of ongoing operations. Handling of debris by personnel, rather than by machine, was kept to a minimumto avoid the possibility of a person being cut and the wound becoming contaminated. When