Data Quality Objectives Summary Report for Characterization of Fine Grained Sediments at Area C
Approximately 200 surface barriers will be required to cover waste sites on the Central Plateau. These barriers will serve to limit or eliminate recharge through the waste sites, effectively isolating contamination from the underlying groundwater. Barrier design will begin in fiscal year (FY) 2004 in support of U Plant waste site closure; construction of these barriers is scheduled to begin in FY 2005. A vital part of barrier design is the evapotranspiration (ET) layer. This is the top layer, which retains precipitation during the rainy season and allows it to evaporate and/or be transpired by plants in the dry season. This layer will consist of fine-grained silt/loam, which only occurs in a few areas on and near the Hanford Site. A large volume of this type of soil is needed to meet the needs of waste site barrier construction at the U Plant waste sites, the BIC Cribs areas, and other 200 Area waste sites. A previous study (BHI-01551, ''Alternative Fine-Grained Soil Borrow Source Study Find Report'') that investigated four borrow source areas on or near the Hanford Site concluded that Area C, located south of the Rattlesnake Barricade and Highway 240, is the only site with the potential to meet the needs of the numerous 200 Area waste sites. The data indicate that Area C has substantial reserves, and that it occurs as a continuous body suitable for exploitation. The amount of suitable material identified in BHI-01551 carried a large uncertainty, with volume estimates ranging from 1.9 to 6.6 million m3. This data quality objective (DQO) is being performed to reduce the uncertainties associated with the fine-grained borrow soils in Area C suitable for use as an ET barrier. This DQO summary report focuses on identifying the types and amount of data that must be collected to confirm that enough suitable and exploitable fine-grained soils are available in Area C to meet construction requirements for 200 Area surface barriers. This effort directly supports remediation of U Plant waste sites and the BIC Cribs, but other projects that plan to use fine-grained material for engineered barriers also may benefit from the results.
- Research Organization:
- Fluor Hanford, Richland, WA (United States)
- Sponsoring Organization:
- ENVIRONMENTAL MANAGEMENT (US)
- DOE Contract Number:
- AC06-96RL13200
- OSTI ID:
- 816302
- Report Number(s):
- WMP-17686, Rev.0; TRN: US200320%%403
- Resource Relation:
- Other Information: PBD: 4 Sep 2003
- Country of Publication:
- United States
- Language:
- English
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