EESA10H3 Lecture Notes - Lecture 10: Wingspread, Risk Assessment, Bioaccumulation
12 Apr 2017
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Risk - possibility ???? or probability of suffering harm from a hazard. Must sometimes take action without full scientific understanding of hazard. Risk assessment sets default procedures for bridging gaps in scientific understanding. Basic framework: evaluate exposure and toxicity; bring this information together to characterize a health risk . Help identify risks that are easily reduced or eliminated. Help clarified what is known and not known about situation. Can provide quantitative information for decision making. Health canada regulations for foods and drugs. Canada council of ministers of the environment: national contaminated sites program, canada-wide environmental standards (cwes) Ontario ministry of environment: site-specific clean-up guidelines for contaminated soils. 1. problem definition: purpose, management goals, policy context, receptors , audience, hazard definition, level of funding. Identify contaminant: single compounds or, complex mixture with a few compounds. !3: driving toxicity, conta- minated soil, and/ or air pollution, and/or. Analysis: organism, species or groups of species exposed to stressor, define scenario:
