This draft report from the City of Burien analyzes environmental impacts of proposed updates to the Seattle-Tacoma Airport Master Plan, covering noise and vibration, air quality, water resources, and visual aesthetics. The study found that while the airport's Environmental Impact Statement used accepted noise modeling methods, several gaps remain — including the need for better data on aircraft noise levels, surface traffic noise, and vibration effects on nearby residents and buildings. Mitigation measures to address these issues will be developed in a separate follow-up report.Open full document
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This draft executive summary outlines the environmental issues analysis conducted for the City of Burien’s Seattle-Tacoma Airport Master Plan Update Studies. It covers four primary areas: noise and vibration, air quality, water resources, and aesthetics and visual impacts. The document identifies deficiencies in the existing EIS studies and recommends additional analysis and mitigation measures to be developed in a separate Mitigation Plan.