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FIELD ASSESSMENT OF MULTIPLE DNAPL REMEDIATION TECHNIQUES
Citation:
Wood*, A L., T. R. Lee, AND C G. Enfield*. FIELD ASSESSMENT OF MULTIPLE DNAPL REMEDIATION TECHNIQUES. Presented at 3rd Intl. Conf. Remediation of Chlorinated and Recalcitrant Compounds, Monterey, CA, 05/20-23/2002.
Description:
Five DNAPL remediation technologies were evaluated in constructed test cells 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 efficiency. PCE concentrations in the groundwater were measured before and after remediation and these dates were used to evaluate the impact of partial mass removal on dissolved contaminant concentrations. Three dimensional sampling networks in the test cells were used to map spatial distribution of DNAPL. Results of the field demonstrations will be presented and the performance of the technologies will be compared.