FIGURE 6-14. DEBRIS REMOVAL DURING AOMON CRYPT EXCAVATION. Longsections of “I” and “Hbeams had to be removed prior to driving of sheetpile in this area. The clamshell bucket was used as a grapple to search for debris since the water in the hole was too dirty for more precise methods. (February 1979) The U.S. Army element excavated soil in search of metallic debris at two locations outside of the area eventually bounded by the sheetpile. The locations of these searches were based on results of the magnetometer survey, but no significant debris was found at Excavation Site 1, shown on Figure 6-11. A substantial volume of debris was removed from Excavation Site 2 (Figure 6-14), then the soil was replaced in the hole so the sheetpile could be driven. Metallic debris had to be removed first so as to not interfere with driving of sheetpile. (After the main excavation was completed, the soil was again removed from Excavation Site 2 and transported to Yvonne.) 181