Casco Bay's soils contain a legacy of environmental toxics.  CBEP attempts to assess concentrations of these toxics, their potential impacts on marine life, and any changes in levels of sediment toxics over time

• Are the Levels of Toxic Chemicals in Casco Bay Sediments Changing Over Time? Indicator 10, State of the Bay Report, 2010 (PDF)
• What are the Levels of Toxic Chemicals in the Sediments of Casco Bay?, Chapter 4, Toxic Pollution in Casco Bay: Sources and Impacts (PDF)
• Assessment of Sediment Contamination in Casco Bay, Geochemical and Environmental Research Group, Texas A&M University, 2005 (PDF)
• Sediment Contaminants in Casco Bay, Maine: Inventories, Sources, and Potential for Biological Impact, M.C. Kennicutt II, T.L. Wade, et al.  Environmental Science & Technology, Vol. 28, No. 1, 1994  (PDF)
• Toxic Contaminants in the Surficial Sediments of the Fore River, Maine, M. Doan, March 2005. (presentation slides (PDF) | download data files