Notes
Final Supplemental Environmental Impact Statement (SEIS) — combined NEPA and Washington State SEPA document — prepared by the FAA Northwest Mountain Region (responsible federal official: Dennis Ossenkop) and Port Of Seattle (SEPA contact: Barbara Hinkle) for proposed Master Plan Update development actions at Seattle-Tacoma International Airport (STIA), May 1997. Volume 2 contains Appendices C-2 through F, beginning with Appendix C-2: Air Quality. The SEIS addresses a proposed 8,500-foot third parallel runway (Runway 16X/34X) separated 2,500 feet from existing Runway 16L/34R, extension of Runway 34R by 600 feet, new air traffic control tower, North Unit Terminal, Main Terminal improvements, parking and access expansion, South Aviation Support Area for cargo/maintenance, and support facility relocation. Environmental impacts assessed include wetlands, floodplain encroachment, stream relocation, historic sites, noise, water quality, and air quality conformity analysis under the Clean Air Act amendments. Development period: 1997–2010. Case number FAA-WA-96007-3-Fsup v.2.