Air quality monitoring data from November 14, 2024, showing SMPS (Scanning Mobility Particle Sizer) particle bin counts (log10) and total ultrafine particle (UFP) counts for two co-located instruments at the 10th and Weller monitoring site, used to assess measurement precision. The charts span approximately 14:51 PST on Nov 13 through 09:11 PST on Nov 14, 2024, and appear to be produced by an organization whose partial logo (likely Air Quality or similar agency) is visible in the lower corners.

Notes

Air quality monitoring data from November 14, 2024, showing SMPS (Scanning Mobility Particle Sizer) particle bin counts (log10) and total ultrafine particle (UFP) counts for two co-located instruments at the 10th and Weller monitoring site, used to assess measurement precision. The charts span approximately 14:51 PST on Nov 13 through 09:11 PST on Nov 14, 2024, and appear to be produced by an organization whose partial logo (likely Air Quality or similar agency) is visible in the lower corners.

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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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