This 1998/1999 study by the Washington State Department of Ecology monitored levels of oxides of nitrogen and particulate matter in the SeaTac area, likely in relation to emissions from Seattle-Tacoma International Airport and surrounding traffic. Prepared by Jim Frost and Doug Knowlton of Ecology's Air Program, the report assessed local air quality conditions during that period. It serves as a technical reference for understanding pollution levels near the airport in the late 1990s.

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A monitoring study conducted by the Washington State Department of Ecology examining oxides of nitrogen and particulate matter in the SeaTac area during 1998 and 1999. The report was prepared by Jim Frost and Doug Knowlton of the Ecology Air Program. The document was revised on December 13, 1999.

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As the source for federal transportation grants, the Puget Sound Regional Council was charged with developing a system to meet the growing need for commercial aviation. When the search for a second airport failed, they authorized the Port of Seattle to build the Third Runway, with a mandate to develop a noise abatement and mitigation program. In their effort to stop the Third Runway, the ACC argued over every detail of the Port's efforts--including property buyouts and sound insulation. The dispute was meant to be settled by a three member Expert Arbitration Panel. This is their final report. It finds 2-1, that the Port's program was insufficient in several respects. Despite that, funding for the Third Runway was approved by the PSRC, and the 'Port Package' program, proceeded largely unchanged. Expert Arbitration Panel's final decision finding that the Port of Seattle had not shown sufficient reduction in real on-the-ground noise impacts to satisfy noise reduction conditions required for approval of a third runway at Sea-Tac International Airport. The majority decision concluded the Port's noise abatement programs were insufficient despite being impressive in scope.

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