HGL is providing PBR services, ranging from assessment through final cleanup, at 54 Defense Environmental Restoration Program (DERP) sites within MAFB, headquarters of U.S. Central Command, and APAFR, Florida. HGL has exceeded the contract minimum performance objective of 23 site closeouts (SCs) by advancing 31 sites toward SC, meeting no further action conditions at 18 sites, and achieving final regulatory SC at 23 sites in under 4.5 years.
Work includes completing source removal actions for soils contaminated by polycyclic aromatic hydrocarbons (PAHs), metals, petroleum products, and munitions debris (MD); constructing biosparging systems to treat volatile organic compounds (VOCs) in soil and groundwater; and using in situ remediation technologies to treat groundwater contaminants. Project complexities include addressing sites with challenging karst hydrogeology and dense non-aqueous phase liquid (DNAPL) sources, adjacent to active taxiways, within an active bombing range at APAFR, and near sensitive wetlands and estuaries.
|✔||Conducted site remediation and developed and implemented an Optimized Exit Strategy.|
|✔||Implemented in situ remedies, including in situ chemical oxidation, bioremediation, biosparging, and enhanced reductive dechlorination (ERD) at 15 sites to treat POL contaminants, VOCs/semivolatile organic compounds, PAHs, and pesticides.|
|✔||Implemented innovative thermal ERD and deep soil excavations using large-diameter augers to remediate DNAPL beneath the water table.|
|✔||Excavated over 75,000 tons of source materials, including POL- and DNAPL-contaminated soils.|
|✔||Completed over 65,000 hours of work without a safety incident.|
|✔||Received National Safety Council Perfect Record Awards for 2014 through 2017.|
|✔||Received “Exceptional” ratings in all categories in 2017 CPARS evaluation.|