British Columbia Mine Reclamation Symposium

A framework for conducting human health risk assessment at contaminated sites Zapf-Gilje, Reidar, 1951-; Boyle, B.; Wright, W.; Haerer, W.; Macfarlane, M.


The recommended human health risk assessment framework allows for the consideration of site-specific factors, such as the screening of exposure pathways, contaminants and receptors, and encourages the development of a conceptual site model, which will enable the risk assessor to focus on matters of potential significance or concern. The need to provide interim deliverables, in the form of technical memoranda documenting assumptions made and procedures used in the the problem formulation, toxicity assessment and exposure assessment phases, is emphasized. As demonstrated above, provisions made for the use of stochastic modelling, where appropriate, will likely result in estimates of risk mat more closely reflect reality, and allow uncertainty to be quantified; value-of-information analysis can then be performed to determine where additional (if any) investigation or modelling efforts should be focussed.

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