1321 - Office of Legacy Management - U.S. Department of Energy

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FDF Subcontract No. 98SC000001
IT Project No. 773481
Desciiption of opttation & Process
IssueDatc 2/13/98 Rev. B
0 Material from OU1 Contaminated Soil Stockpile will be conveyed across the rail
spur into the Material Handling Building and will be stock piled in a designated
bin.
Following segregation in the waste pit area, excavated material will be transferred at a rate of
approximately 100 tons per hour, to one of two mixing pits in the Material Handling Building. A
common sump, located to the south of the mixing pits, will collect free water runoff fiom the
waste being received. The water collected in the sump will be pumped out as needed for
processing through the WTS.
2.3.2 Initial Blending
Waste material will be removed from the mixing pits by a front end loader and moved to a
blending area in the Materials Handling Building. The initial blending will serve two purposes:
(1) to blend materials with high radioactive content and materials with low radioactive content in
such proportions as to meet the off-site disposal facility WAC, and (2) attempt to achieve
optimum moisture content without the need for processing through the dryer. This blending is
not for the purpose of diluting characteristically hazardous waste to render it nonhazardous.
Should both of the objectives of the initial blending operation be achieved, the blended wastes
will be transferred directly to the Railcar Loadout Building for storage and sampling prior to
loading into railcars for shipment to the off-site disposal facility without further processing.
Production of WAC-compliant blends bypassing the dryer operations may be used as the
principal method of production for some excavation phases. This mode of production is referred
to as Alternative Waste Production.
23.3 Screening
Waste material will be screened with or without blending at the discretion of the IT Shift
Supervisor. The primary objective of the screening operation is to properly size waste material -
for processing through the dryer. Three screening systems (H- 1004A/B) are being evaluated for
use in this operation. These are:
0 A stationary 4-inch vibrating deck screen
0 A rotating trommel-type screen
0 An equipment-mounted rotating trommel-type screen.
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Material handling equipment, such as a front end loader will be used to feed either of the
screening devices. The screens will discharge both oversize and on-size materials to piles on the
floor of the Materials Handling Building from which they will be moved by hnt end loaders (or
KN/3957MrPRAPIEZIE1.WPD/02-20-98(909 ayDlME 5
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