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LLNL Emergency Management Plan (EPlan) Rev 27 January 2022 59 Category IV. This CBC performance objective is specifically for an Essential Facility where continued uninterrupted operation is needed after a catastrophic earthquake. This included the design and installation of nonstructural components/equipment needed to keep the building operational following a major earthquake. The decision to use a higher seismic performance objective was based on the need following a major 2,500-year seismic event for the LLNL EOC to be available to support emergency response to onsite nuclear facilities - which are designed to a higher earthquake standard than CBC Risk Category IV. The new facility provides space for; • an EOC capable of self-sustained 24-hour operations for a minimum of 72 hours without support from site infrastructure or services; • site local emergency response functions; and • site life-safety/industrial alarms monitoring and site emergency communications (i.e., site Fire Department dispatching, building voice announcement systems, etc.) functions. The design and construction requirements for the facility specifically addressed: • survivability from the initial effects of the emergency (e.g., earthquake ground shaking, security threats); • habitability within the facility during the emergency (e.g., high-efficiency particulate air [HEPA] filtration, positive pressure envelope, ability for short-term isolation from external atmospheric contaminants); • sustainability of operations for extended periods up to 72 hours without resupply of critical resources (e.g., fuel, food, water, sewage management); and • accessibility of the facility to response staff during an emergency impacting the LLNL site. The EOC in this building can manage and coordinate LLNL's response during and after an emergency or regional disaster. It accommodates all the activities an EOC must perform to be effective; • obtaining and maintaining situational awareness; • developing plans of actions; • supporting Incident Command and First Responders in the field; • initiating emergency procurements and staging obtained resources; • multi-agency coordination; and • continuously assessing the impacts and potential consequences of an emergency to employees and the public.