MEC Removal and HTRW Cleanup at Fort Belvoir Engineer Proving Ground (EPG), Fort Belvoir, Virginia

From 2008 through 2014, HGL was tasked with achieving Remedy in Place (RIP)/Response Complete (RC) at sites within the Fort Belvoir EPG, a high-profile BRAC installation, under a performance-based task order from the Army Environmental Command (AEC). The work, which was performed in close coordination with the U.S. Army Corps of Engineers, Baltimore District (CENAB), included completing a munitions clearance, environmental investigations, removal actions, remediation, and long-term management at seven sites that contained MEC, material potentially presenting an explosive hazard (MPPEH), MC, and HTRW-contaminated soil and groundwater.

HGL performed a RCRA Facility Investigation (RFI) followed by CERCLA remedial activities and removal actions to excavate and remove buried wastes and achieve site closure. The schedule for MEC removal was met, and HGL achieved RC at the MEC sites. No further action (NFA) was established as the preferred alternative for the seven sites.

During the removal actions, a large MEC/HTRW disposal pit was identified and required HGL to excavate an approximately 100-square-foot area to a depth of 26 feet. HGL used on-site testing of removed HTRW items to accelerate characterization of the excavated material, allowing for on-time completion of the MEC removal.

HGL continues to work with CENAB to provide environmental remediation services for 26 sites at Fort Belvoir, including the Mine and Booby Trap Area Munitions Response Site (MRS). The performance objectives and requirements to complete RC at this MRS include selecting the remedy by completing the Proposed Plan and Decision Document, implementing a focused MEC/MPPEH removal on 33 acres, and implementing land use controls as outlined in the FS.

Benching and Sloping of MEC Disposal Pit
Project Highlights
Completed MEC removal in an accelerated period of 9 months, which included removing MEC from a 100-square-foot pit that was approximately 26 feet deep, using mechanical excavation and sifting techniques.
Investigated over 226,000 anomalies and recovered 4,452 UXO items, 12,373 pounds of MD, and 76,305 pounds of non-ordnance-related debris.
Investigated MC and coincidental HTRW contamination, performing a chemical characterization of commingled HTRW to expedite work at one site and remediating metals at another to bring it to clean-closure.
Received final CPARS ratings of “Exceptional” for Quality, Management, and Regulatory Compliance; and “Very Good” for Schedule.