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Sediment Toxicity Near Gas Works Park, Lake Union, Seattle

Publication number Date Published
03-03-014March 2003
VIEW NOW: Acrobat PDF format (Number of pages: 37) (Publication Size: 425KB)

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Author(s) Jack, R.
Description The Department of Ecology analyzed sediments using chronic bioassays at 11 sites across northern Lake Union and at two reference sites on Lake Washington. Chemical concentrations in the test sediments were not analyzed. All Chironomus tentans bioassay results document sediment toxicity above the cleanup screening level criteria as defined in Ecology’s Sediment Management Standards. One of the test stations also had a cleanup screening level exceedance for Hyalella azteca. Results indicate that toxicity extends beyond the limits of this investigation, and comparisons with six historic bioassay stations suggest that no changes in sediment toxicity have occurred.
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Keywords chemical concentrations, results, toxicity, chemical, sediment, standards, toxic, management, sediment management standards, lake
WATERSHED Water Resource Inventory Area 08 Cedar-Sammamish
DATA Environmental Information Management (EIM) #RJAC005


Quality Assurance Project Plan: Comparison of Toxicity in Lake Union Sediments Using Molecular DNA Techniques and Conventional Bioassay Measures