Soil Cleanup Operations | . (4) Backfill excavated areas. e n of tio ple (5) Clean and decontaminat sheet pile upon com project. " | nt (6) Establish and maintain land routes for the moveme nity equipment, and contaminated soil and debris in the vici the Aomon Crypt and Aomon. (7) Prepare a beach ramp for loading of soil and debris. (g) Provide other assistance as required. . c, USNE: (1) Provide water craft for movement of equipment, debris, ¢ contaminated soil to and from the Aomon Crypt. (2) Clear channel(s) of obstructions to allow access to the beact (3) Assist in the channel dredging operations. d. USAF Element: Provide FRST personnel for radiation control « safety. e. DOE-ERSP: (1) Perform all analysis required for contaminated soil remo (2) - operations. Develop equipmentsuitable for underwater soil sampling. (3) Resurvey the entire crypt in sufficient detail to allow certificat of radiological condition. f, H&N-PTD: (\) . Provide 45-ton crane and operators to emplace sheet p excavate soil and debris, and remove sheet pile after back operations. ~ (2) Design, build, and operate a sand dredge to clear a channel the vicinity of the Aomon Crypt. (3) Provide maintenance supportfor specialized equipment. INITIAL EXCAVATION OF THE CRYPT Initial excavation began on |S January 1979 (Figure 7-34). Based on exploratory operations, it was determined there was a possibility that tt areas contained debris and/or contaminated soil. The central, and larg area of suspected contamination would be isolated using a sheet - enclosure. The other two smaller areas were located on the eastern western sides of the sheet pile enclosure. The eastern area was the smallest and was thoughtto contain debris a small amountof soil contaminated above 400 pCi/g. On 15 January |! this location was excavated. The horizontal dimensionsof the excava were 5 by IS meters and its depth was approximately 9 feet. No debris ee