Exposure Control

Principles of Exposure Control
There are generally five accepted strategies for controlling exposure to hazardous materials:

1. Elimination

  • The first and most desirable control
  • For example, an experiment could be changed so that a toxic chemical does not need to be used

2. Substitution

  • Replace a chemical with a less hazardous chemical, one that is less toxic and more easily disposed
  • For example, use water-based instead of solvent-based materials

3. Engineering Controls

  • Engineering controls separate or isolate the hazardous material from the worker
  • Example:  local exhaust ventilation, fume hoods

4. Administrative Control

  • Implementing safe work procedures to reduce exposure to hazardous materials
  • For example, only work with small quantities of hazardous chemicals and limit exposure time

5. Personal Protective Equipment

  • PPE is the most common but least desirable control. The use of PPE does not reduce or eliminate the hazard at the source.
  • Examples:  respirators, gloves, safety glasses