Port of Seattle, Aviation Environment and Sustainability P.O. Box 68727 Seattle, Washington 98168 Dear Steve Rybolt: The U.S. Environmental Protection Agency has reviewed Federal Aviation Administration’s November 2024 Draft Environmental Assessment for the Seattle-Tacoma International Airport Sustainability Airport Master Plan Near Term Projects (EPA Project Number 18-0056-FAA). The EPA has conducted its review pursuant to the National Environmental Policy Act and our review authority under Section 309 of the Clean Air Act. The CAA Section 309 role is unique to the EPA and requires the EPA to review and comment publicly on any proposed federal action subject to NEPA’s environmental impact statement requirement. The DEA evaluates the potential environmental impacts associated with implementing thirty-one near- term projects (NTPs) to meet the forecasted demand of the airport to 2032, including a second terminal with additional gates, an elevated busway, cargo facilities, roadway realignment, airfield updates, parking infrastructure, and facilities for sustainable aviation fuel. The project area is approximately 5.8 square miles in the City of SeaTac in King County, Washington. The DEA identifies and evaluates a No Action Alternative (Alternative 1), the Proposed Action (Alternative 2) which proposes to construct a new second terminal north of the existing terminal, and a Hybrid Terminal Option (Alternative 3). After reviewing the DEA, the EPA has identified public health and environmental quality concerns about potential project impacts to communities with environmental justice concerns and is providing recommendations to improve the assessment and environmental outcome of the proposed action. In addition, the EPA recommends providing…Open full document
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18-0056-FAA DEA SeaTac Airport SAMP NTP