Controlling a hazard at its source is the best way to protect employees. Engineering or administrative controls to manage or eliminate hazards to workers is the preferred option. When engineering or administrative controls are not feasible or do not provide sufficient protection, supervisors must provide personal protective equipment (PPE) to their workers and ensure its use. Attire when occupying a laboratory or shop containing hazardous materials or equipment.
There are several ways to protect against exposure to airborne contaminants. The most effective are engineering and administrative controls. (Engineering controls can include measures such as increasing ventilation or installing a fume hood; administrative controls involve changes in work procedures.) The law requires that these controls be considered before employees are issued respirators. If engineering and administrative controls are infeasible, respirators can be assigned.
