Soil and Groundwater Program Manager, DOE Office of Environmental Management Sector
Pacific Northwest National Laboratory
Dr. Freedman is the PNNL Soil and Groundwater Program Manager for the DOE Office of Environmental Management Sector. She leads the Deep Vadose Zone program, which leverages investments from basic science, applied research, and site contractors in a collaborative effort to address the complex region of the deep vadose zone at Hanford. The primary goal of this program is to develop innovative remediation alternatives for deep vadose zone challenges in characterization, prediction, remediation, and monitoring and ensure long-term protection of water resources through development and application of transformational remedial solutions. She has a Ph.D. in Environmental Sciences from The Ohio State University, and specializes in hydrogeology and vadose zone hydrology. Dr. Freedman’s research activities have included theoretical and numerical studies of coupled hydrodynamics, contaminant transport, and geochemistry in environmental systems since joining PNNL in 2000. She has been involved in both forward prediction and inverse modeling of tank farm wastes at the Hanford Site, and has been a major contributor to the vadose zone modeling for field investigations of past leaks, as well as tank closure performance assessments (PA) investigating potential leak scenarios. She is particularly interested in solving real-world problems using high performance computation, and leads the development of the Platform software that is part of ASCEM (Advanced Simulation Capability for Environmental Management, a collection of next-generation toolsets for use in environmental applications). Through this work, she has demonstrated the use of supercomputers and to model subsurface discharges and evaluate potential remediation technologies in the deep vadose zone at Hanford.
Achieving Implementable Remedies and Long-Term Management of Radionuclides at Complex Sites
Drinking water standards have historically been used to implement baseline cleanup goals for contaminated soil and groundwater, but technical challenges make it difficult to fully remediate to these standards at complex sites within reasonable time frames. In this presentation, challenges associated with geologic complexities, co-mingled radionuclides, metals and other contaminants, and continuing sources from the deep vadose zone at the Hanford Site are described within the context of achieving implementable remediation goals. The emphasis is on the technical basis needed to support decision-making as part of a holistic remediation approach for use at Hanford and other sites with significant complexity.