In many cases, the ultimate risk to residents from environmental lead comes from multiple sources. While lead based paint is a key source, lead migrating from outdoor areas can be as toxic as the indoor paint sources. Dr Troast uses the Integrated Exposure Uptake and Biokinetic Model IEUBK Model) as a predictive tool for assessing residences. The IEUBK Model allows the user to determine a statistically valid probability of whether the blood lead levels of children exceed the risk thresholds used by Federal agencies.
In many legal cases, there are multiple residences which may have contributed to the neurotoxic effects of lead. Just as often there may be a residence which did not materially contribute to the effects of lead on children residing in the home. Using the IEUBK Model, available blood lead data, and other environmental data, Dr. Troast can offer analyses demonstrating that certain residences did or did not materially add to the effects of lead in children residing in homes.
Dr Troast will use his unique knowledge of the IEUBK Model and lead toxicity at the Environmental Information Association at their 2013 Meeting. He will address the utility of examining the lead sources in conducting an exposure assessment and risk assessment that relates lead exposures to the newly reduced lead thresholds. The report will present case studies where Dr Troast used the IEUBK Model to determination whether individual residences contributed to mental decline in children residing in those houses.
Richard Troast, PhD was a senior scientist at the US EPA in the Hazardous Waste Program in Washington DC until his retirement in 2005. He has over 30 years' experience in toxicological and environmental assessments. Dr. Troast chaired the EPA group responsible for development of the IEUBK Model.
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