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Contaminant Loading to the Lower Duwamish Waterway from Suspended Sediment in the Green River

Publication number Date Published
09-03-028November 2009
VIEW NOW Contaminant Loading to the Lower Duwamish Waterway from Suspended Sediment in the Green River (Number of pages: 118) (Publication Size: 3MB)

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Author(s) Gries, T. and J. Sloan
Description To support Lower Duwamish Waterway (LDW) cleanup efforts, total organic carbon (TOC), polychlorinated biphenyls (PCBs), and other contaminants were measured in suspended Green River sediment. Centrifuges and sieves collected samples on seven occasions between July 2008 and January 2009.

Contaminants were generally greater than measured in bedded sediments upstream of the LDW but less than indicated by water samples. Fine suspended sediments usually had higher concentrations than sand-sized particles. Daily contaminant loading rates were calculated. Lower and upper bounds for annual loading rates and average concentrations were approximated. These values were sensitive to assumptions about contaminant concentrations during highest streamflows.
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Keywords Lower Duwamish Waterway, suspended sediment, sampling, contaminant, Green River, cleanup, river, water, loading
WEB PAGE Lower Duwamish Waterway
WATERSHED Water Resource Inventory Area 09 Duwamish-Green
DATA Environmental Information Management (EIM) #LDW_08


POSTER: Sediment transport and contaminant loading to the Lower Duwamish Superfund Site from the Green River: Application of innovative sampling technologies to verify model predictions

Quality Assurance Project Plan: Loading of Contaminants to the Lower Duwamish Waterway from Suspended Sediments in the Green River