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Comment Period

General Electric Aviation

Periodic Review

Nov. 7, 2019 - Dec. 16, 2019, 11:55 p.m.

We want to hear from you!

We are overseeing cleanup of contamination on the former General Electric Aviation (GE) property at 220 S. Dawson St., Seattle, WA 98108.

The following documents are available for review and comment:

  • Five-year periodic review: We review monitoring data to make sure the cleanup methods are working. This review is for cleanup actions for the groundwater under the property.

You can also review documents at these locations:

Department of Ecology
Northwest Regional Office
3190 160th Ave. SE
Bellevue, WA 98008-5452
Call for appt. 425-649-7190

New Holly Library
7058 32nd Ave. S
Seattle, WA 98118

Recent cleanup actions

GE has tried three different methods to cleanup trichloroethylene (TCE) and other contamination in the groundwater under the property.  Most recently in 2019, GE injected zero valent iron particles (ISCR) mixed with organic plant material into the contaminated groundwater.  This treatment has been slow to work in some areas and is not yet working in other areas.

We will continue to review the monitoring results and are considering other cleanup methods. If a new method is needed, we will hold a public comment period. GE still plans to use ICSR to clean up contaminated groundwater that has moved off the property.

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Comment online

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Comment by mail

Dean Yasuda
Department of Ecology, Northwest Regional Office
3190 160th Ave. SE
Bellevue, WA 98008
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Thea Levkovitz
Public Involvement Coordinator

To request ADA accommodation, contact Ecology's ADA Coordinator by email at ecyadacoordinator@ecy.wa.gov, or call 360-407-6831, 711 (relay service), or 877-833-6341 (TTY). More about our accessibility services.