5.4 Physical/Engineering Controls

Safety equipment (primary barriers) includes biological safety cabinets, enclosed containers and other engineering controls designed to remove or minimize exposures to hazardous biological agents.  Users of biohazardous agents must ensure biological safety cabinets and other protective equipment are adjusted and functioning properly prior to initiating an activity requiring their use.  The design and construction of the facility (secondary barriers) also contributes to the laboratory workers’ protection in addition to providing protection to persons outside of the laboratory and within the community from biohazardous agents which may be accidentally released from the laboratory.