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Comment Period

Block 38 West Cleanup Site, Seattle

Draft Agreed Order and Public Participation Plan available for comment

March 16, 2020 - April 14, 2020, 11:59 p.m.

We are inviting public comment on cleanup documents for the Block 38 West site.

The Block 38 West site is located at 500 - 536 Westlake Ave N. in Seattle. It is part of the South Lake Union neighborhood, which is located next to downtown Seattle and bordered on the north by Lake Union. 

The following documents are available for review and comment:

  • Agreed Order – requires the potentially liable person (PLP) to complete a Remedial Investigation (RI), Feasibility Study (FS), and draft Cleanup Action Plan (dCAP) for the site.
  • Public Participation Plan (PPP) – Describes how Ecology will inform the community about site activities and opportunities to be involved in the cleanup process.


This area has a long history of industrial and commercial activities which caused contamination of the soil and groundwater. Currently, this area is undergoing extensive redevelopment as new buildings are constructed for commercial and residential use. Proposed construction activities at the site could impact an existing groundwater contaminant plume located nearby. We are working with property owners to clean up contamination present at the site and other nearby sites to reduce impacts to human health and the environment. 

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Comment by mail

Tena Seeds
3190 160th Ave SE
Bellevue, WA 98008
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Tena Seeds
Site Manager

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.