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Description: Travis Air Force Base Land Use Compatibility PlanSection 4.1 Compatibility Zones EstablishedIn total, the Air Force Base features six compatibility zones, A, B1, B2, C, D, and E, as well as two overlay zones, the Assault Landing Zone (ALZ) Training Overlay Zone and the Height Review Overlay Zone. Each of the compatibility zones and overlay zones are generally described with tabular information relating to density and intensity requirements and additional zone-specific criteria. The Plan provides additional general, noise, safety, aircraft protection, and overflight regulations and supporting criteria that apply to each of the compatibility zones.Section 4.2 Compatibility Zone A Compatibility Zone A consists of the Travis AFB runways (the two existing major runways and the ALZ, together with immediately adjoining areas within the runway primary surface and clear zones. The dimensions are set in accordance with Federal Aviation Administration (FAA) and Air Force criteria.Section 4.3 Compatibility Zone B1 Compatibility Zone B1 comprises Accident Potential Zone I (APZ I) as defined by the Air Force. This is an area of substantial risk situated within 7,500 feet of the runway ends. It is also subject to potential noise levels in excess of 80 dB Community Noise Equivalent Level (CNEL).Section 4.4 Compatibility Zone B2Compatibility Zone B2 is comparable to Accident Potential Zone II (APZ II) as indicated in Air Force guidelines, but is expanded to encompass approach and departure flight tracks that are not aligned with the runway. High risk and potential noise levels in the 70-to-80-dB CNEL range are the major compatibility factors.

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