TagEnvironmental Impact Statement(400)

This document is the References section of the Environmental Assessment for Seattle-Tacoma International Airport's Sustainable Airport Master Plan Near-Term Projects, prepared by Landrum & Brown in October 2024. It lists the sources cited across four chapters, including federal regulations, FAA advisory circulars, technical memoranda, city and county planning documents, and environmental studies used to evaluate the airport's proposed near-term development projects. Key references cover topics such as air quality, greenhouse gas emissions, stormwater management, facility requirements, and land use planning for the communities surrounding Sea-Tac Airport.

This October 2024 report from the Washington State Department of Ecology examines options for collecting and disposing of Aqueous Film-Forming Foam (AFFF), a firefighting chemical that contains harmful PFAS compounds. The Final Programmatic Environmental Impact Statement evaluates the potential environmental effects of different collection and disposal methods for this toxic foam, which has historically been used at airports and military facilities. It is published by Ecology's Hazardous Waste and Toxics Reduction Program and is unrelated to airport noise policy.

This technical report analyzes existing surface transportation and traffic conditions around Seattle-Tacoma International Airport as part of the Sustainable Airport Master Plan (SAMP) Near-Term Projects Environmental Review. It examines 108 intersections — including signalized, stop-controlled, and uncontrolled locations — along key travel routes connecting the airport to surrounding communities, focusing on weekday PM peak-hour traffic volumes. The study also includes freeway analysis of SR 518 and I-5 ramps and segments at the request of WSDOT.

The Federal Aviation Administration (FAA) issued a Negative Determination in July 2024, concluding that planned near-term construction and equipment relocation projects at Seattle-Tacoma International Airport (SEA) are not reasonably likely to cause effects on Washington State's coastal zone. The 31 Near-Term Projects, which include taxiway extensions, blast pad expansions, and relocation of navigational aids, are part of the airport's Sustainable Airport Master Plan and are scheduled to begin construction in 2026. The FAA requested written concurrence from the Washington State Department of Ecology, while the Port of Seattle remains responsible for separate consistency certification for any projects requiring Clean Water Act permits.

In May 2024, the Council on Environmental Quality published major updates to the rules governing how federal agencies must review environmental impacts of projects, affecting everything from public participation to project timelines. The changes place new emphasis on environmental justice, requiring agencies to meaningfully engage communities facing disproportionate environmental burdens, and remove previous rules that limited who could challenge agency decisions in court. While some updates are designed to speed up the review process, others may add new requirements for agencies and project sponsors seeking federal permits or funding.

This technical report, prepared by Landrum & Brown for the Port of Seattle in June 2024, outlines the purpose and need for near-term construction and improvement projects identified in Sea-Tac Airport's Sustainable Airport Master Plan. It is part of a broader set of supporting documents that also covers alternatives analysis, terminal needs assessment, and air cargo facility requirements. The report provides the foundational justification for proposed airport development decisions and infrastructure changes.

This technical report, prepared by Landrum & Brown for the Port of Seattle in June 2024, outlines the purpose and need for near-term capital projects identified in Sea-Tac Airport's Sustainable Airport Master Plan. It is part of a broader set of supporting documents that also covers alternatives analysis, terminal needs assessment, and air cargo facility requirements. The report provides the foundational justification for proposed airport improvements and infrastructure expansions at Seattle-Tacoma International Airport.