At the end of this course, the student should: 1) Understand the various strategies used by occupational hygienists to reduce or eliminate exposures to chemical stressors in the work environment; 2) understand the principles of industrial ventilation design as it relates to the removal of toxic chemicals from the workplace, including general and local exhaust systems, make-up air, fans, air cleaning systems, and recirculation; 3) be able to assess the effectiveness of ventilation systems in controlling health hazards; 4) Understand the principles, uses and limitations of respiratory protection, including correct selection for chemical and biological agents; and, 5) Understand the importance of substitution, isolation and other non-engineering control methods for reducing health risks in the workplace.