Introduction: past history; legislation; emergency planning and response. Process and plant accidents: process fundamentals; process equipment; classification of accidents; fires, explosions, toxic emissions and hazardous spills; process applications. Health risk assessment: introduction to health risk assessment; health hazard identification; dose-response; exposure assessment; health risk analysis and characterization. Hazard risk assessment: introduction to hazard risk assessment; event/hazard identification; accident causes and probability; accident consequences and evaluation; hazard risk analysis. Quantitative hazard risk assessment: hazard risk assessment fundamentals; hazard risk assessment calculations; hazard risk analysis applications.