This book provides the theory and the practice of risk assessment and management in the context of hazardous substances in the workplace based on a rational conceptual framework. Exposure to chemicals in industry and commerce is particulary important given the volume of chemicals used, the different forms in which they may exist and their range of health effects. This book will address the historical perspectives; discuss the various models available, propose a more comprehensive model and discuss the various elements of risk assessment and the management process. Furthermore applications of risk assessment and management in various industrial sectors will be discussed based either on substance or the process involved. This book will link the theory with the practice of risk assessment and management. It will provide the individual responsible, as well as those involved in providing input into the process of risk assessment and management in the workplace a clear understanding of the issues and the activities involved. It will also provide examples of assessment and management in a range of selected industries and processes.