III H. Hazardous Facilities
Structures housing, supporting or containing sufficient quantities of toxic or explosive
substances to be dangerous to the safety of the general public if released.
III E. Essential Facilities1
Facilities involved in handling or processing sensitive munitions, nuclear weaponry or
materials, gas and petroleum fuels, and chemical or biological contaminants.
Facilities involved in operational missile control, launch, tracking or other critical defense
Mission-essential and primary communication or data handling facilities.
Hospitals and other medical facilities having surgery and emergency treatment areas.
Fire, rescue, and police stations.
Designated emergency preparedness centers.
Designated emergency operations centers.
Designated emergency shelters.
Power generating stations or other utilities required as emergency back-up facilities for
Seismic Use Group IIIE facilities.
Emergency vehicle garages and emergency aircraft hangars.
Aviation control towers and air traffic control towers.
Waste treatment facilities required to maintain water pressure for fire suppression.
Essential facilities are those structures that are necessary for emergency operations subsequent to a natural disaster.
Table 4-1 Seismic Use Groups-Continued