Hydrogeologic Conceptual Model for the Carbon Tetrachloride and Uranium/Technetium Plumes in the 200 West Area: 1994 through 1999 Update

This report updates the hydrogeologic conceptual model for the carbon tetrachloride and uranium/technetium plumes in the 200 West Area of the Hanford Site over the last 5 years (1994 through 1999). During this 5-year period, the Environmental Restoration Contractor has been performing interim remedial actions at three operable units to remove the carbon tetrachloride and uranium/technetium contamination from the subsurface.