English

DTIC ADA606932: The Impact of DNAPL Source-Zone Architecture on Contaminant Mass Flux and Plume Evolution in Heterogeneous Porous Media

This project was designed to accomplish a systematic study of the mass-transfer behavior of chlorinated-solvent immiscible liquids in heterogeneous porous media at multiple scales, and to investigate the impact of source-zone architecture on mass discharge and plume response. The project involved both bench-scale and field-scale investigations, as well as mathematical modeling analysis. A unique component of the project involved comprehensive long-term studies conducted at a field site (the TIAA site). The analyses employed contaminant mass discharge as an integrative measure of the performance and effectiveness of remediation efforts. The standard approach of characterizing discharge at the source-zone scale was expanded to provide characterization at the plume scale, which was evaluated by examining the change in contaminant mass discharge associated with plume-scale pump-and-treat systems. This approach allows linking the impacts of source-zone remediation to effects on site-wide risk. The studies reported herein investigated the impact of source-zone remediation efforts on contaminant mass discharge and associated plume response at an unprecedented resolution and scale. The res

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