Work plan for the excavation of contaminated materials from 100-D Ponds

摘要

The D Ponds were used as a treatment, storage and/or disposal (TSD) facility under the Resource Conservation and Recovery Act of 1976 (OKRA). The D-Ponds waste site is located in the 100-DR-1 Operable Unit of the 100 Area at the Hanford Reservation. The site consists of two surface ponds (now dry) separated by an earthen dike. the south pond was used as a settling pond for waste water from the 100-D Area and contains the sediment material to be removed. The north pond was used as a percolation pond and received clarified overflow from the settling pond. Two horizontal pipes, buried in the earthen dike, connect the two ponds and allowed the water to overflow from the settling pond to the percolation pond. This work plan describes the work required to remediate the D-Ponds waste site. The actions needed to remediate the site include the removal and disposal of contaminated sediments, piping and debris. This remedial action is required to be complete by 1998. The U.S. Department of Energy, Richland Operations Office is voluntarily accelerating the cleanup.