Client : USACE Omaha District
Statement of work:The project consists of conducting a range of PBR services ranging from assessment through final cleanup, at 54 Defense Environmental Restoration Program (DERP) sites at MAFB and APAFR, FL. Approximately 76,105 tons of soils and munitions debris (MD) have been removed from 21 sites to address metals, munitions, hydrocarbons, and polyaromatic hydrocarbons (PAHs). In addition, various methods of in-situ treatment have been used to treat groundwater contaminated with hydrocarbons and chlorinated solvents, including sites contaminated with DNAPLs. Groundwater treatment technologies include in-situ chemical oxidation (ISCO), air sparging, and enhanced anaerobic bioremediation (including enhanced reductive dechlorination [ERD]). Over the course of the project over 1.3 million pounds of chemical oxidants and/or amendments have been injected at 11 sites. Project complexities include addressing sites adjacent to active taxiways, within an active bombing range at APAFR, and near sensitive wetlands and estuaries. Performance and long-term groundwater monitoring, well repairs, landfill cover O&M, and well abandonment have been conducted over the course of the project. HGS is providing HGL technical services on this project by conducting technical review on multiple sites where ERD is currently being implemented to treat chlorinated solvents and petroleum hydrocarbon remediation is ongoing. Technical review consists of assessing remedy performance and providing recommendations for additional treatment.