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EMERGENCY MEDICAL SERVICES FIRST RESPONDER ADV/AN(.ED LIFE SUPPORT AGREENIENT (REV 217/11) EXHIBIT B - DEPICTION & DEFINITION OF SUB-AREAS 1. Density Area Designation: Designations of call density areas were accomplished by reviewing the call density for every square kilometer grid in the County. The grids were normalized by examining the underlying road structure with the goal of creating zones with Rural/Suburban contiguous with Metro/Urban, eliminating anomalous pockets of high or low density in the midst of one of the density areas, and creating a map that can be incorporated into the computer aided dispatch system. Sub-area definitions are for general descriptive purposes only; the actual sub-areas are identified on the maps in this Exhibit. The map defines the subarea, not the actual number of calls received during any period. The identified Sub-areas are subject to change at the discretion of the County. 2. Sub-Areas: There are 3 possible Sub-areas contained within each ERZ. Metro/Urban call densities are determined by identifying the square kilometers that average 2 or more calls per month and at least half of the surrounding square kilometers also average 2 or more calls per month. Rural/Suburban areas are those in which the average calls per square kilometer are between 0.25 and less than 2.0 calls per month on average. Wilderness/Low Call Density is determined by identifying the square kilometers that average less than 0.25 calls per month (or one call every 4 months, on average) Alameda County: I Conte Cosa r� i {I -1-••. . afP0lt ToneJar* IA. Alamrn 'fir - a San Francisco o..ryn _ __ l ' Oakland _r �.... ®.. Bay .1 InlamaliDnel •0 a :7: - ____4 _-.,i Nrport ar .....�t . ll _ :. p re Ingama _. - - 09 m / ro`l- ,: Wow City • w - i . rl. rtCarlos _- Urban F ... ti .: y Rural is a _ ° Banta Clan 11 Wilderness Page E-2