EPA Region 10 letter to FAA Northwest Mountain Region regarding Sea-Tac Airport Master Plan conformity analysis

In this August 23, 1996 letter, the U.S. EPA Region 10 responds to the FAA's request for clarification on the conditional approval approach for the Seattle-Tacoma International Airport Master Plan Update. The EPA explains that NEPA, SEPA, and federal Clean Air Act conformity rules prohibit piece-mealing or segmenting projects to obscure environmental impacts, and that any conditionally approved projects — such as the North Unit Terminal — must eventually demonstrate full compliance with all applicable environmental laws before receiving final approval.

Notes

The EPA Region 10 responds to an FAA July 15, 1996 letter seeking clarification on issues related to EPA’s June 1996 comment letter on the FAA’s draft conformity analysis for the Seattle-Tacoma International Airport Master Plan Update. The letter addresses the FAA’s conditional approval approach for the Airport Layout Plan (ALP), including the development of an additional runway and the North Unit Terminal. EPA raises concerns about piece-mealing or segmentation of projects under NEPA, SEPA, and the Federal Clean Air Act conformity rules.

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