The Puget Sound Air Pollution Control Agency (PSAPCA) raised concerns in 1992 about inadequate air quality analysis in the Flight Plan Project's environmental impact statement, citing missing dispersion modeling for both vehicle and aircraft emissions near Sea-Tac Airport. A follow-up 1992 letter addressed the use of ethylene glycol as a de-icing agent at Sea-Tac, concluding it was unlikely to pose a significant air quality risk due to its low vapor pressure. A 1993 internal memo clarified PSAPCA's role in reviewing airport-related environmental impact statements and conducting annual inspections of registered equipment at airports within its jurisdiction.Open full document
Notes
A memo and related correspondence from the Puget Sound Air Pollution Control Agency (PSAPCA) addressing air quality issues at Sea-Tac Airport. The documents include a February 1992 letter critiquing the Flight Plan Project Draft Programmatic Environmental Impact Statement for inadequate air quality analysis, a May 1992 letter to the Department of Ecology regarding de-icing with ethylene glycol at Sea-Tac Airport, and a February 1993 memo summarizing PSAPCA’s role in regulating airport air quality within its jurisdiction.