erations 359 Soil Cleanup Op ( We US my ( FIGURE 7-27. AOMON CRYPT. The original formation of the crypt apparently had not been documented, and discussions with personnel who had been ontheatoll at that time yielded conflicting information. It was reported that the remains of the steel tower from the Kickapoo shot had been cut into sections no greater than 10 feet long and placed rather uniformly in the center ofthe crypt with a crane.>> It also was reported that the crypt contained about §,000 cubic yards of contaminated soil from the Yuma GZarea. Later investigation indicated that the soil volume from Yuma was approximately 1,500 cubic yards; however, it also indicated about 5,000 cubic feet of contaminated Yumadebris were present.34 In addition to incomplete knowledge on the exact contents of the crypt. its precise three-dimensional location was unknown, and the method by which the contaminated soil and debris would have to be removed was no! at all certain. The area had an extremely high water table, and it was apparent that excavations of contaminated soil and debris would have tc be performed under water. EARLY SURVEYS OF THE CRYPT The first investigations of the crypt area were made by the FRST i: October 1977, using powered earth augers. They brought up samples o St