C St, Shelton, WA 98594

General location of Shelton C Street Landfill - click to enlarge
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We are working with the City of Shelton to investigate and cleanup Shelton’s C Street Landfill. The formal agreement, called an Agreed Order, between the City of Shelton and Ecology that defines how cleanup will proceed was finalized in 2016.

The Agreed Order and Public Participation Plan for the Shelton C Street Landfill site was available for public comment during the spring of 2016. During the comment period, we held a public meeting and hearing to discuss the site and the proposed Agreed Order. Ecology presented basic elements of the site history and cleanup process during both meetings.

Ecology's Cleanup Process
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In spring, 2017, we finalized two documents that will help us find the nature and extent of contamination at the C Street Landfill.

  • The Contaminants of Potential Concern Memo - This memo contains a list of chemicals and metals the City of Shelton will look for during the remedial investigation.
  • The Remedial Investigation Work Plan - This work plan describes how and where investigators will look for contaminants. The results from this work will be compiled in the Remedial Investigation and Feasibility Study (RI/FS) report. We will ask for public comment on this report before it is final.
To see either of these documents, you can click the links below, or click the "View Electronic Documents" link on the right.


The Shelton C Street Landfill is just west of downtown Shelton and U.S. Hwy 101. The Landfill was actively used as a dumping site for various industrial, municipal, and other waste for much of the 1900s. To read more about the site, click the “View Electronic Documents” link on the right.


Ecology and the City of Shelton are beginning the cleanup process with a remedial investigation. This investigation is an in-depth study to find out what needs to be cleaned up and where. It will: 

  • Determine site features like groundwater flow and soil type
  • Define the type and extent of contamination
  • Assess potential effects on human health and the environment
  • Define the goals for cleanup


Public involvement is a key part of the the cleanup process. We will ask you to provide comments on cleanup documents when they are ready. If you would like to be added to the site’s mail list, contact the Public Involvement Coordinator at the link on the right. 

In 2016, we invited public review and comment of the agreed order and public participation plan for the cleanup of the C Street Landfill.

Click the links below to review the comments we received, attachments delivered with them, and our responses. One commenter referenced a compact disc of background information in their comment. That disc is available for review at Ecology’s Southwest Regional Office.


Ecology provided an update on the Goose Lake and C Street Landfill cleanup sites to the Shelton Commission on March 17, 2014.

View presentation


Map showing site location as Mason County, WA SITE INFORMATION


View Electronic Documents

Cleanup Site Details Report

Facility Site ID: # 1186

Cleanup Site ID: 2295

Shelton, Mason County

Status: Cleanup Started   Get definitions of Status terminology

Andrew Smith
Site Manager
(360) 407-6316

Nancy Davis
Public Involvement Coordinator
(360) 407-0067

Document Repositories:

Southwest Regional Office
300 Desmond Dr SE
Lacey, 98503-1274