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Regional Sediment Evaluation Team

Sediment Evaluation Framework for the Pacific Northwest -  Finalized May 2018

The US Army Corps of Engineers and US Environmental Protection Agency share federal responsibility for regulating dredged material within waters of the United States under section 404 of the Clean Water Act and for regulating dredged material in ocean waters under section 103 of the Marine Protection, Research, and Sanctuaries Act.

Under section 401 of the CWA, the states of Washington, Oregon, and Idaho must also certify that aquatic discharges do not violate state and federal water quality standards.

This Sediment Evaluation Framework for the Pacific Northwest provides a framework for assessing and characterizing sediment to determine the suitability of dredged material for unconfined, aquatic disposal; determine the suitability of post-dredge surfaces; and predict effects on water quality during dredging. The Sediment Evaluation Framework describes procedures for evaluating potential contaminant-related environmental impacts of dredging and the aquatic placement of dredged material in inland waters and the disposal of dredged material in ocean waters.

The framework is designed for use in the Pacific Northwest, defined here as the States of Washington, Oregon, and Idaho. It will be periodically revised and updated as warranted by advances in regulatory practice and technical understanding.

This 2018 Sediment Evaluation Framework was prepared by the Northwestern Regional Sediment Evaluation Team (RSET) agencies and finalized in May 2018. It updates the 2016 SEF, which replaced the 2009 SEF and the freshwater benthic toxicity screening levels published in the 2006 interim final SEF.

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