EPA Remedial Investigation and Feasibility Study (RI/FS) Update

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Published: Monday, 05 February 2024 18:56

In 2005, the Environmental Protection Agency (EPA) initiated the Upper Columbia River Remedial Investigation and Feasibility Study (RI/FS). Funded under a settlement agreement with Teck, its purpose is to establish the nature, extent and possible human and ecological risks of metals and other contaminants released into the environment.

EPA and the Participating Parties (Ecology, Confederated Tribes of the Colville Reservation, Spokane Tribe of Indians and Department of Interior) are currently reviewing the Draft Final Upland Remedial Investigation (RI) Report, that Teck American Inc., submitted in October 2023.

EPA released the Final Upland BERA (Baseline Ecological Risk Assessment) in December 2023. The BERA evaluates the risk of chemicals (in this case primarily metal contaminants) in soils to plants and wildlife. Also known as Operable Unit 3, the uplands refer to approximately 100 square miles (64,000 acres) east and west of the Columbia River below the U.S.—Canada Border. The BERA is posted at www.ucr-rifs.com/documents/risk-assessments/bera/.

The upcoming Upland Feasibility Study will define the areas needing cleanup and evaluate a range of cleanup alternatives to address risks to people’s health and the environment.

TAI will submit the Aquatic BERA in April 2024.  This BERA will evaluate risk to plants, wildlife, fish, and other organisms in and along the river from contaminants such as zinc, copper, cadmium, mercury, and lead found in sediment and slag.