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Comment period

Occidental cleanup site, Tacoma

Documents available for review and comment

Dec. 18, 2023 - March 29, 2024, 11:59 a.m.

We invite you to review and comment on cleanup documents for contamination cleanup at Occidental Chemical Corporation located at 605 E. Alexander Avenue in Tacoma, Washington.

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Please review and comment on:

In-person locations

You may also review these documents in person at several locations. Please see our Occidental public notice for a list of locations.

How to submit comments

This public comment period opens Dec. 18, 2023 and closes March 29, 2024. You may submit formal public comments in the following ways:

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.

Site background

From 1929 to 2002, the Occidental Chemical Corporation (Occidental) site in the Tacoma Tideflats was used for industrial chemical production, shipbuilding, and military activities. Occidental made chemicals to sell, such as chlorine, caustic soda (sodium hydroxide), and solvents trichloroethene (TCE) and tetrachloroethene (PCE). Occidental manufactured about 457 million pounds of solvents at this location. An estimated one million pounds of solvents contaminate the groundwater.

However, it does not affect homes, public places, public drinking water, or activities such as swimming, paddleboarding, or boating.

We oversee the investigation and cleanup of the groundwater, surface water, and soil by applying the Model Toxics Control Act (MTCA), our state cleanup law. MTCA requires us to ensure that people, wildlife, and the environment are protected from harmful chemicals.

For more information about the site and the history of contamination:

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Comment online

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Comment by mail

Kerry Graber, Site Manager
Department of Ecology - Southwest Region Office
P.O. Box 47775
Olympia, WA 98504
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Kerry Graber
Site Manager
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