This 180-acre Superfund Site in Missouri is bisected by a small river with a manufacturing area located to the east on a floodplain, and a wooded upland area to the west. Waste disposal and associated remedial actions occurred in both areas during the 1970s. The primary contaminant of concern is dioxin. Following changes in toxicological standards for dioxin, USEPA concluded that the protectiveness of the historical remedies could not be assured and requested the Responsible Party conduct a “Protectiveness Review”.
To address the Superfund Protectiveness Review, an Administrative Order on Consent (AOC) and a complex set of work plans to promote health and safety, assure quality, and investigate soil, sediment, and groundwater were developed by Foth and approved by regulators, including to:
Understanding the Superfund process, Foth provided innovative approaches to the investigation effort by applying advanced sampling and data analysis techniques, with USEPA and State approval, to reduce the level of effort and risks while providing defensible data. These included:
Over the past year media coverage and public scrutiny has prompted a series of public interactions, hosted by USEPA. The extraordinary Superfund related work and measures taken at the Site, combined with robust data collection, analysis and reporting, have provided technically defensible data, particularly with regard to the protectiveness of historical soil remedies.