Malcolm Pirnie - Removing Subsurface Contamination at a Government Facility

Remediation

SOLUTIONS FOR:

Projects

Removing Subsurface Contamination at a Government Facility

Assessment and removal of subsurface contamination

Client:	U.S. Army Corps of Engineers, Baltimore District
Project:	Assessment and Removal of Subsurface Contamination
Location:	Watervliet, NY

Issue

The 140-acre Watervliet Arsenal had extensive subsurface contamination resulting from munitions manufacturing throughout past operations. Since some areas of contaminated soil could not be accessed for excavation, the New York State Department of Environmental Conservation and U.S. Environmental Protection Agency turned to Malcolm Pirnie for innovative remedial strategies.

Solution

Malcolm Pirnie designed and evaluated a suite of corrective measure studies to remove dissolved-phase and free-phase petroleum hydrocarbons and chlorinated hydrocarbons, including: vacuum extraction, air sparging, reactive barrier walls, cut-off trenches, recovery wells, passive LNAPL recovery, and in-situ bioremediation of contaminated soils. We also designed and implemented interim corrective measures (ICM) to evaluate the feasibility of removing LNAPLs from fractured bedrock via passive recovery.

BenefitS

Based on the corrective measures studies, we combined in-situ permeable iron reactive walls, soil excavation, on-site landfarming, off-site disposal, and capping to address subsurface petroleum and chlorinated solvent contamination at inaccessible areas across the site. We are currently monitoring these technologies at more than 25 solid waste management units throughout the facility.