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