ENVS 4040 Lecture Notes - Hydrology, Epidemiology

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The basic model, partitions risk assessment into four steps: hazard identification, dose-response modeling, exposure assessment and risk characterization. Integration of a risk assessment with a cost analysis and other matters to develop strategies for risk regulations and control often called risk management. Hazard identification uses the input of biologist, chemist and others to determine whether available data indicate that some compound or exposure should be considered possible hazards. Dose-response modeling requires the input of statisticians, epidemiologist and people expert in developing models that predict adverse response as a function of dose. Toxicologists are important for understanding mechanism of toxicity and the relevance of animal data for human exposures. Exposure measurements often require the input of engineers as well as hydrologist (for waterborne hazards), meteorologists (for airborne hazards). Six essential issues arise in risk assessment. First, not every person exposed to a potential hazard will exhibit an adverse response.

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