Buddy System: A system for organizing employees into work groups in such a manner that each
member of the work group is designated to be observed by at least one other member of the
group at all times. The purpose of the buddy system is to provide rapid assistance to employees
in the event of an emergency.
Chemical Hazard: The exposure of employees to any regulated or non-regulated hazardous
materials (solids, liquids, and gases; natural and man-made), with the potential for causing harm to
people, the environment, or property when released.
Confined Space: An enclosed area that has one or more of the following characteristics:
It is not intended for continuous occupancy,
It has restricted entry and exit, and
It may contain potential or known hazards.
Contamination Reduction Corridor: The area that controls access into and out of the
Exclusion Zone/Radiological Area and where personnel decontamination activities take place.
Contamination Reduction Zone: The transition area between the Exclusion Zone and Support
Zone. The area where decontamination procedures take place.
Controls: Changes in the work processes and/or working environment with the objective of
controlling the hazards either by eliminating the responsible agents, or reducing them to levels
believed not to be harmful to health, as well as by preventing exposure to workers.
Critical Operations: Those emergency operations necessary for the safe emergency shutdown of
an operation, site, task, or piece of machinery.
Critical Operations Personnel: Those personnel identified in writing and trained to accomplish
emergency shutdown operations. These personnel may be required to delay their own evacuation
of the site during an emergency.
Emergency (Confined Space): Any occurrence (including any failure of hazard control or
monitoring equipment) or event internal or external to the confined space that could endanger
Emergency (Site): A sudden and unexpected event, taking place on the site, and requiring
urgent action for control or remediation in order to minimize the danger to workers, the public,
the environment, or property.