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Assessment of Sediment Toxicity near Post Point (Bellingham Bay)

Publication number Date Published
08-03-016June 2008
VIEW NOW Assessment of Sediment Toxicity near Post Point (Bellingham Bay) (Number of pages: 62) (Publication Size: 2MB)

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Author(s) Gries, T.
Description Studies near the Post Point Wastewater Treatment Plant outfalls found sediment toxicity ascribed to sulfides. This study was to determine if this toxicity warranted detailed cleanup investigations.

Sediments were collected from 8 locations in September 2007 and tested using 4 bioassays. Sulfide levels in sediment, porewater, and during bioassays were also measured. Only 2 samples had minor toxicity, but they were among the highest sulfide levels measured, and a dose-response relationship was suggested. Sulfides levels near Post Point were not different from levels in other inner Bellingham Bay areas.

Recommendations include no detailed studies, limited monitoring for sediment toxicity, and new sampling and toxicity test methods.
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Keywords recommendations, wastewater treatment plant, sulfide, toxicity, treatment, assessment, sediment, standards, toxic, quality, waste
WEB PAGE Urban bay sediment monitoring
WATERSHED Water Resource Inventory Area 01 Nooksack
DATA Environmental Information Management (EIM) #PPTox07


Quality Assurance Project Plan: Assessment of Sediment Toxicity near Post Point (Bellingham Bay)