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Corral Hollow Road is the only offsite evacuation route for Site 300. Once vehicles exit Site 300, county and state authorities coordinate the traffic. Evacuation to either the east or the west on the road will be based on cloud path or potential cloud path patterns. ARAC meteorological support personnel will be available to provide assistance upon request. 11.2.3 Evacuation of Offsite Locations Should there be an imminent or actual release, the IC or his designate immediately determines the character, exact source, amount,and extent of any released materials through observation, review of records,questioning of employees working in the area,use of available test equipment, and information gathered by the site Incident Command Team.The IC or designee concurrently assesses possible hazards to human health or the environment that may result from the release. The assessment includes both direct and indirect effects of the release(e.g., fire; explosion;the effects of any toxic, irritating,or asphyxiating gases that are generated;or the effects of any hazardous surface runoff from water or chemical agents used to control fire-and heat-induced explosions). If assessment reveals an indication that evacuation of local areas is advisable,the Fire Department Duty Chief immediately notifies local authorities via the Fire Division's PC-based, automatic communicator system.The IC and/or Duty Chief, Site 300 Manager,and the technical staff will provide information, such as ARAC data, to assist appropriate officials in evacuation decisions. In every situation,the IC,Duty Chief,or designate will immediately notify the State Office of Emergency Services. 11.3 Evacuation Procedures for Facility Personnel Evacuation procedures for the general Facility staff,the Facility Manager or Representative(or alternate), and the Assembly Point Leader are outlined in the sections below. 11.3.1 Facility Manager,Representative,or Alternate The Facility Manager, Representative,or alternate follows these steps in a large-scale emergency (that requires evacuation): • Remain in the general work area until it is safe to leave. • Notify personnel of the evacuation order. • Act as Sweep Team Leader; help the Assembly Point Leader organize a sweep team. • Conduct a rapid sweep of the Facility to locate unaccounted for personnel who may be injured,provide assistance as needed,and observe the general condition of the Facility. • Ensure that all personnel have left their respective operational areas. • Go to the Emergency Assembly Point, await instructions from the Site 300 Department Operations Center. In the interim,follow the Assembly Point Leader's instructions. 11.3.2 Assembly Point Leader Assembly Point Leaders provide local command and control of an emergency situation during periods when emergency response forces are unable to provide assistance. Guidance is provided by Self-help Plans for the assigned area. LLNL Site 300 Contingency Plan 29 January 2019