How can you be certain that your laboratory sediment, soil, organism tissues, and water tests reflect actual chemical exposures at contaminated sites?
Understanding the bioavailability and bioaccumulation of chemicals in soils, sediments, organism tissues, and water is imperative for managing contaminated sites. Often, the absorption of chemicals from soils, sediments, or water is lower than the absorption in laboratory toxicity studies that form the basis of regulatory values. A site-specific evaluation of bioavailability can produce more realistic estimates of exposure and risk to help establish cleanup goals that are scientifically defensible and protective of human health and the environment.
Exponent designs studies and obtains data and other information that can be used to develop more accurate assessments of chemical bioavailability. Specifically, we have developed site-specific oral bioavailability values and bioavailability data for ecological risk for metals (antimony, arsenic, beryllium, copper, cadmium, chromium, lead, mercury, and vanadium) and organic compounds, including polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), per- and polyfluoroalkyl substances (PFAS), and dioxins and furans exposures.
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