Gather Information about the incident location....
** At 2:50 p.m., the responders arrive at the scene of the incident. The incident commander realizes that what began as one incident--a tanker overturn--has become two incidents: a leak and a toxic plume. The hazardous materials experts estimate that they will have the leak plugged within 90 minutes--then the source of the incident will be under control. However, residential areas in the toxic plume’s path are still in danger. At this point, police responders take responsibility for civil evacuation decisions. What follows is the Oakland Police Department’s further use of the EMIS....
Decisions about evacuations involve several factors. To make the best decisions about who to evacuate and when to initiate the evacuation, the police department needs information about:
* the potential extent of the endangered area,
* sensitive populations within the endangered area,
* population density information at the neighborhood level,
* resource availability (e.g. how many officers are available, and where are they?),
* locations of other sensitive facilities (such as hazardous materials sites), and
* transit routes into and out of the emergency area.
To most efficiently mobilize their finite number of officers to evacuate the endangered area, the police department needs to know the entire extent of the toxic plume. In the worst case, the leak will remain unplugged until the entire contents of the tank truck have escaped into the atmosphere.
? Show the current plume location, the plume 90 minutes from now, and the “worst case” plume extent superimposed on a detailed street map of the city...
....This view now becomes the basemap for all further information displays from the EMIS.
Plume # 1 :Current Plume Area
Plume # 2 : Ninety-Minute Plume Area
Plume # 3 : Worst Case Plume Area