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Comment Period

Boeing Auburn public comment period

Boeing Auburn cleanup documents available for public comment

Sept. 12, 2022 - Nov. 11, 2022, 11:59 p.m.

We invite you to review and comment on cleanup documents for contamination cleanup at the Boeing Auburn facility, located at 700 15th St. SW in Auburn, Washington.

Please review and comment on:

Public comment period

This public comment period opens Sept. 12, 2022 and closes Nov. 11, 2022. Submit your comments:

When the public comment period ends, we will consider all comments and may change the documents based on them. After considering all comments, the documents will become final.

Will there be a public meeting?

At this time, there are no public meetings scheduled for this comment period. We will hold a public meeting if 10 or more people request one. To request a meeting, please contact Janelle Anderson at 425-301-6454 or email janelle.anderson@ecy.wa.gov.


Boeing has owned and operated the Auburn facility since 1966. Boeing treated and stored hazardous waste and used a liquid chemical—trichloroethylene (TCE)—to clean and degrease metal airplane parts. The site became contaminated when some of the TCE leaked into soil and groundwater.

Boeing no longer uses TCE. Through an interim cleanup action Boeing successfully cleaned up the TCE-contaminated soil on their property.


Chemical levels are low enough that they do not present risks to human health. There are trace levels of the following chemicals:

  • Trichloroethylene (TCE): Liquid chemical commonly used to remove grease from metal parts.
  • cis-1,2-dichloroethene: Chemical that results from TCE breakdown.
  • trans-1,2-dichloroethene: Chemical that results from TCE breakdown.
  • Vinyl chloride: Toxic chemical created when TCE breaks down.

The most toxic chemicals are TCE and vinyl chloride. Vinyl chloride naturally degrades into non-toxic end products.

The groundwater flowing away from the Boeing Auburn facility is contaminated with TCE and its breakdown products. The contaminated groundwater flows north and northwest from the Boeing property, under portions of Algona and Auburn. The areas of highest remaining contamination in groundwater are under the Outlet Collection Mall.

Contamination at this site is declining at a steady rate due to natural breakdown and will be enhanced in certain areas by treatments applied under the Cleanup Action Plan.

For more information about the site and the history of contamination, go to our Boeing Auburn webpage, or read the:

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Comment online

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Comment by mail

Li Ma, Site Manager
Department of Ecology Northwest Region Office
P.O. Box 330316
Shoreline, WA 98133
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Janelle Anderson
Community Outreach Specialist
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