CERCLA Corrective Action
The facility’s wastewater treatment plant underwent certified closure under the Resource Conservation and Recovery Act (RCRA) in 1981; however, impacts to groundwater from chlorinated solvents used during historical manufacturing processes were observed and the site was placed on the National Priorities List in 1992. Since that time, numerous investigation and remediation activities have been completed to characterize site conditions and address groundwater contamination. Remedial approaches have included air sparging/soil vapor extraction (AS/SVE), in situ chemical oxidation, in situ chemical reduction with zero-valent iron (ZVI), enhanced biological reductive dichlorination (ERD), and groundwater extraction and treatment. The remedial measures have significantly reduced the extent of the groundwater contaminant plume, although certain areas of the site still exceed groundwater cleanup goals (drinking water Maximum Contaminant Levels). GEI manages ongoing long-term operations and maintenance, hydrogeologic investigations, conceptual site model refinement, hydrogeologic modeling, remedial process optimization, remedial implementation, regulatory relations with EPA Region 3 and Delaware Department of Natural Resources and Environmental Control (DNREC), and closure strategy development.
Program Manager: John Jolly (404) 803-9094