Public Comment Form

Reserve Silica Reclamation RI

The Reserve Silica Reclamation site (Site) is located at 26000 Black Diamond Ravensdale Road, between Ravensdale and Black Diamond, Washington. The Site is in a historical mining area where coal and sandstone have been mined from a tilted bedrock formation south of Ravensdale Lake and Ravensdale Creek.


Two surface mining pits – the Lower Disposal Area (LDA) and Dale Strip Pit (DSP) – were reclaimed with cement kiln dust and mining spoils between 1979 and 1988 under the permitting authorities of two King County agencies, currently known as King County Department of Local Services and Public Health – Seattle & King County (Public Health).


Reserve Silica Corporation and Holcim (US) Inc. entered into an agreed order under the state’s cleanup law, the Model Toxics Control Act (MTCA) in December 2019. The Agreed Order requires the companies to complete a:

·       Remedial Investigation (RI).

·       Feasibility Study (FS).

·       Preliminary Draft Cleanup Action Plan (CAP).

 

Ecology is inviting comments on the following Draft Remedial Investigation

The Remedial Investigation describes the site history, regulatory and environmental settings, field investigations, conceptual site model, and proposed cleanup standards for the Site.



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Comments are due by May 30, 2025 at 11:59 P.M.


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Next Steps: After the close of the comment period, Ecology will review and consider all comments received as we finalize the documents and respond accordingly.





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