Cement-based solidification/stabilization (S/S) treatment technology is enabling the U.S. Environmental Protection Agency to clean up the New Bedford Harbor Superfund site while reusing the treated material to build a dewatering facility.
The New Bedford, Mass., site, located in an 7,300-hectare (18,000-acre) urban estuary, is highly contaminated with polychlorinated biphenyls (PCBs) and heavy metals. PCBs are man-made, odorless, and colorless chemicals used in the manufacture of electrical transformers and capacitors. PCB wastes were discharged directly into the harbor as well as indirectly through the city's sewer system. PCB levels are highly variable throughout the site, with concentrations as high as 40,000 parts per million (ppm) in wetland and mudflat sediments.
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