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Lecture 5 - Risk Assessment Lecture#5 Risk Risk Assessment...

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1 Risk Assessment Lecture#5 Risk Risk Assessment Potency Factor (ICP#1) Incremental Cancer Risk (ICP#2) Reading: R: Ch 14 (sections 14.1 – 14.6) Overview What is risk? What are the steps of risk assessment for pollutants? What do common dose-response curves look like? What is a potency factor and how is it calculated (ICP#1)? How can incremental cancer risk be estimated (ICP#2)? Environmental Regulation provides the means to implement the laws for environmental protection allows concentration standards to be established for protecting public and ecosystem health from harmful effects of pollutants e.g., in air NAAQS, in water MCLs but how does one establish the needed information on which to base air and water quality standards this is a question of hazard and risk assessment What is Risk? Risk Assessment? Risk : The probability that a substance or situation will produce harm under specific conditions. Risk is a combination of two factors: the probability that an adverse event will occur and the consequences of the adverse event Risk Assessment : A systematic method to determine probability of adverse effects A common application of risk assessment methods is to evaluate human health and ecological impacts of chemical releases to the environment Risk Voluntary Risk : A result of action taken by choice. Firefighting, driving, smoking, bungee cord jumping- statistical data of humans Natural Disasters : These include floods, hurricanes, earth quakes, and other disasters beyond human control- statistical data of humans Involuntary Risk : Risk resulting from uncontrollable actions of others. Examples
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