The objective of this project was to demonstrate and validate placement, stability and performance of reactive amendments for treatment of contaminated sediments in active Department of Defense (DoD) harbor settings. This project extends pilot-scale testing of the application of activated carbon (AC) to decrease the bioavailability of polychlorinated biphenyls (PCBs) in contaminated sediment to near full-scale demonstration under realistic conditions at an active DoD harbor site. The evaluation was conducted at Pier 7 of the Puget Sound Naval Shipyard and Intermediate Maintenance Facility (PSNS & IMF) in Bremerton, Washington.