TagEA(2)

This document outlines the forty most frequently asked questions about the National Environmental Policy Act (NEPA), covering topics such as how agencies evaluate a range of alternatives, the role of environmental impact statements (EIS), and the use of environmental assessments (EA). It provides plain-language guidance on requirements like the no-action alternative, mitigation measures, public comment periods, and records of decision. While not specific to airport noise, it serves as a foundational reference for understanding the federal environmental review process that governs major infrastructure projects such as those at Sea-Tac Airport.

In October 2012, the Federal Aviation Administration (FAA) approved new GPS-based arrival flight paths into Seattle-Tacoma International Airport (Sea-Tac) under the 'Greener Skies Over Seattle' initiative. The new procedures, developed in partnership with Alaska Airlines, Boeing, and the Port of Seattle, use satellite navigation technology to guide arriving aircraft on more precise, fuel-efficient descent paths from the northwest and southwest. The FAA concluded that the changes would not cause significant environmental harm, issuing a Finding of No Significant Impact (FONSI) alongside its formal approval.