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Comment Period

Simpson Timber Bunker C, Shelton

Cleanup site - Periodic review

March 28, 2019 - April 28, 2019

Ecology invites the public to review and comment on the draft periodic review report for the Simpson Timber Bunker C site. The periodic review report shows that cleanup work remains effective in protecting human health and the environment.


The site is in the Shelton mill industrial area, adjacent to Goldsborough Creek. In 1991, oil was discovered while digging a trench near the former location of two 13,000 gallon above-ground storage tanks. Testing showed diesel range petroleum hydrocarbons were present in soil above state cleanup levels. They were not detected in the groundwater.
Most of the accessible contaminated soil was removed, but some could not be removed because the site was surrounded by obstructions on all sides. A sheet pile wall along the edge of Goldsborough Creek, operating railroad tracks, and the mill building bordered the perimeter of the cleanup area. After soil excavation, the contaminated area was refilled and covered with clean soil. After the cleanup, monitoring showed petroleum contaminants were not found in the groundwater.
In 2013, an environmental covenant was recorded for the site that restricts land use and requires the soil cover over the buried contaminated soil and the sheet pile wall bordering Goldsborough Creek be maintained in satisfactory condition.

Review process

Ecology conducts a Periodic Review of a site at least every five years after the initiation of a cleanup action when institutional controls are part of a cleanup, as required by the Model Toxics Control Act (MTCA). The purposes of the review are to evaluate site conditions and to ensure continued protection of human health and the environment.

Ecology will review comments received during the comment period and may modify the review if new information is submitted during the comment period. The Periodic Review will become final if no significant changes are made.
Ecology will hold a public meeting if 10 people request one.

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Comment online

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Comment by mail

Panjini Balaraju
WA Department of Ecology
PO Box 47775
Olympia, WA 98504-7775
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Panjini Balaraju
periodic review coordinator

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