Summary Sea-Tac Airport Air Quality Studies 2009

In April 1995 the Federal Aviation Administration (FAA) and the Port of Seattle issued a joint Draft Environmental Impact Statement (EIS) for the proposed Master Plan Update Improvements at the Seattle-Tacoma International Airport. In February 1996 the FAA and the Port issued the Final EIS, which incorporated a draft air quality conformity determination. The Final EIS considered the available Sea-Tac air quality information from previous studies, updated the baseline and projection year emission inventories for the five criteria pollutants of concern, performed area-wide dispersion screening modeling for volatile organic compounds (VOC) and oxides of nitrogen (NOx) and conducted localized traffic intersection modeling analyses for carbon monoxide (CO). Memorandum of Agreement - The modeling found that the proposed project build-out and operational conditions could result in potential exceedences of the NAAQS for CO (9.0 ppm) and near exceedences of the NO2 NAAQS. However, no monitoring data was available with which to interpret the EIS worst case modeling results. Based on these findings and comments to the EIS a Memorandum of Agreement between the Port, FAA, Ecology, PSAPCA and the EPA was agreed upon to conduct air quality monitoring. The purpose of the monitoring was to more accurately describe existing air pollution levels and interpret the EIS modeling results. The proposed monitoring included:  Carbon Monoxide measurements at roadway intersection in the airport vicinity.  Nitrogen Oxides near the ends of the runways.  Engine Exhaust Residue under the flight paths of aircraft. Carbon Monoxide - A carbon monoxide saturation study was…

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PSCAA Advisory Council Meeting Agenda
Add to CalendarMWednesday Mar 11, 9:00am - 11:35am
1904 3rd Avenue, Suite 105, Seattle, WA 98101
Call to order – Roll Call – Quorum Established – Land Acknowledgement We would like to acknowledge that our Agency operates in four present-day counties, which are the traditional lands of the Coast Salish people, past and present. This acknowledgement does not take the place of authentic relationships with indigenous communities in our jurisdiction and [...]