Notes:
The emissions inventory was developed for Seattle-Tacoma International Airport (the Airport) sources using the FAA’s EDMS Version 5.1.4.1. The purpose of the inventory was to identify existing conditions emissions of criteria pollutants as part of the Sustainable Airport Master Plan (SAMP) and to serve as a baseline for considering various strategies to achieve the Port of Seattle’s air quality goals and objective. EDMS was used, as at the time the study began, it was the FAA’s state-of-the-art emissions model and is required when assessing aviation emission sources at Airports. It recognized by the U.S. Environmental Protection Agency (USEPA) as the preferred tool for modeling aircraft emissions.
EDMS was used to estimate emissions from non‐road mobile sources, such as, aircraft engines, auxiliary power units, ground support equipment, ground access vehicles, training fires, and stationary sources, such as generators, commercial kitchens, cooling towers, boilers, and bulk liquid storage tanks. For this evaluation, detailed airport activity characteristics were collected to model each of these sources. Relative to what is typically the dominant airport source (aircraft), data was collected and incorporated into EDMS details on types of aircraft, engine combinations, number of landing and takeoffs (LTOs), and the operating time in each of the LTOs modes (takeoff, climbout, taxi-idle, startup, and approach).
The purpose of this paper is to supplement the Protocol document that was prepared before the analysis was initiated, but documenting the assumptions that produced the results to be used as the existing conditions in the SAMP.