2006 Activated Carbon Pilot Study

Overview

The Activated Carbon Pilot Study (ACPS) was performed from September to October 2006 to evaluate the effectiveness of applying and mixing activated carbon in sediments of the lower Grasse River. Activated carbon is widely used in water treatment facilities to remove organic materials from the treated water. Research conducted to evaluate the use of activated carbon in remediating contaminated sediments has shown that PCBs sorb onto the carbon particles and become trapped, making them unavailable to the fish or other river organisms.

In general, the technology utilized during this pilot study consisted of adding activated carbon to the upper layer of the sediments using specially designed equipment, and monitoring over a multi-year period to determine effectiveness. The ACPS was conducted by Arconic (formerly Alcoa) with oversight from the United States Environmental Protection Agency (EPA; lead), New York State Department of Environmental Conservation (NYSDEC), and the St. Regis Mohawk Tribe (SRMT). The targeted location of the ACPS in relation to previous Arconic pilot studies is shown on the figure below.

Area Map

Study Map