ABSTRACT
This chapter starts with an introduction to both the professional practice of industrial hygiene and the organization of this book. It explains book's use of learning goals and special notations intended to focus one's reading of a broad range of topics into the nuggets that must be thoroughly understood and the few that are memorable. This book focuses on the control of chemical hazards and predominantly upon airborne chemical hazards, although many of the principles presented also apply to airborne biological hazards. It is only after a control has been implemented that exposures and the risks of adverse health effects are reduced, and the people can say that they have made a positive difference. Much of the early part of this book focuses on the physical mechanisms that determine how people are exposed to airborne chemical hazards at work; later chapters illustrate how same mechanisms can be used to reduce employee exposure.
