What is a probabilistic risk assessment? What new data were considered in this assessment?
Because of the statistical way in which a probabilistic assessment is able to analyze a wide range of data, it provides a more scientifically robust analysis. A probabilistic assessment is able to indicate a range of risks estimates based on a range of assumptions and what the likelihood is of any particular risk within the range occurring. This is the first time that EPA has used a probabilistic approach for a non-food use assessment. A deterministic assessment is only able to take into consideration specific point estimates in determining a single risk value. A probabilistic risk assessment provides for a much more accurate, advanced and robust analysis, thereby producing results that can be more closely correlated with exposure scenarios people experience in everyday life. Among the new data considered in the risk assessment are a relative bioavailability study on wood surface residues and soil residues for CCA and a hand wipe study that provides information about CCA residues that
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