2.1 Study Scope and Purpose . . . . . . . . . . . . . 2.2 Organization . . 2.3 Sponsors. . . . . . . . . . . . 2.4 Consultants . . . . . . . . . . . . . . . . 2·5 Participants. . . . . . . . . . . . . . EXISTING CONDITIONS 3.1 Introduction. • • • • • • • • . • . •••• 3.2 Airport Facilities. • • • • • . . • ••••• 3.4 3.5 3.6 3.2.1 Runway and Taxiway System •••••••• 3. 2. 2 Passenger Terminal Facilities • • • • • • . • • • • 3.2.3 General Aviation Facilities • 3.2.4 Air Cargo Facilities. • • ••••• Aircraft Operations • • • 3.3.1 Fleet Mix ••••••••••• 3.3.2 Runway and Flight Track Utilization 3.3.3 Aircraft Fleet Noise Compliance •• Noise Monitoring System • • • • • • • • • • • • 3.4.1 Permanent Airport Noise Monitoring System 3.4.2 Portable Noise Meter ••••••••••• 3.4.3 Noise Monitoring Programs at Other Airports • Environment • • • • • • • • • • • • • • • • • Noise 3. 5.1 3.5.2 3.5.3 3.5.4 3.5.5 3.5.6 Climate 3. 6.1 3.6.2 Aircraft Noise Description Methodologies •• Aircraft Noise Levels • • • • • Ambient Noise Levels Maintenance Runup Noise Levels •• Taxiing Noise Levels ••.•.•••. Total Noise Environment • Meteorological Records…Open full document
Notes
The first major noise analysis after the Sea-Tac Communities Plan and the last before the first Part 150. Revises the noise analysis from the 1975 Sea-Tac/Communities Plan to reflect major changes in aviation operations, particularly airline deregulation (which increased major carriers from twelve to over twenty-five) and the doubling of commuter airline operations. The study forecasts noise exposure levels through 2000 and projects decreasing noise levels primarily due to aircraft fleet modernization—including engine retrofits and replacement of older aircraft with quieter new technology planes—with noise contours showing approximately 10% area reduction between 1980-1985 and an additional 14-15% decrease by 1990, as the affected areas shift closer to the airport.