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FIELD EVALUATION OF DNAPL EXTRACTION TECHNOLOGIES: PROJECT OVERVIEW
Citation:
Wood*, A L., T R. Lee*, C G. Enfield*, M. C. Brooks, T. J. McHale, AND T. J. McHale. FIELD EVALUATION OF DNAPL EXTRACTION TECHNOLOGIES: PROJECT OVERVIEW. Remediation of Chlorinated and Recalcitrant Compounds: The Third Intl. Conference, Monterey, CA, 05/20-23/2002.
Description:
Five DNAPL remediation technologies were evaluated at the Dover National Test Site, Dover AFB, Delaware. The technologies were cosolvent solubilization, cosolvent mobilization, surfactant solubilization, complex sugar flushing and air sparging/soil vapor extraction. The effectiveness of each technology was determined by monitoring the removal of tetrachloroethylene (PCE) from an isolated test cell. Known volumes of PCE were released into the test cell prior to each remediation test. Contaminant elution from the cell was tracked in order to assess DNAPL removal effectiveness. Three- dimensional sampling networks in the test cells were used to map spatial distribution of DNAPL. Results of remedial technology tests suggest that spatial variability of DNAPL saturation and hydraulic conductivity are important factors in determining remedial performance. Partitioning tracer tests were conducted following each DNAPL release. Results from these tests were used to assess the effectiveness of this technique for quantifying the mass of DNAPL in the test cell.