Presentation Title

PCBs Associated with Suspended Solids in the Green River Basin

Session Title

Session S-01B: PCBs in the Green/Duwamish Watershed

Conference Track

Toxics

Conference Name

Salish Sea Ecosystem Conference (2014 : Seattle, Wash.)

Contributing Repository

Digital content made available by University Archives, Heritage Resources, Western Libraries, Western Washington University.

Start Date

30-4-2014 10:30 AM

End Date

30-4-2014 12:00 PM

Abstract

Sources of PCBs to the Lower Duwamish Waterway Superfund Site include the urban drainage basin as well as inputs from upstream portions of the Green River Watershed, which are likely a long-term source of these contaminants to the waterway. To better understand contaminants in the upper watershed, suspended solids samples were collected from four major tributaries to the Green River (Newaukum, Soos and Mill Creeks and the Black River), as well as at two locations on the main stem Green River: an upstream location at Flaming Geyser State Park and a downstream location at Foster Links Golf Course. Two collection methods were used: sediment traps and filtered solids collected by pumping water through filter bags. The sediment traps were deployed for approximately three months over a year-long period. The filtered solids were collected over a 24-hour periods during both baseflow and storm event conditions with a target of one baseflow event and five storm events. While all samples were analyzed for PCBs, polycyclic aromatic hydrocarbons, arsenic and conventional parameters, this presentation will focus on the results for PCBs, grain size and total organic carbon.

Rights

This resource is displayed for educational purposes only and may be subject to U.S. and international copyright laws. For more information about rights or obtaining copies of this resource, please contact University Archives, Heritage Resources, Western Libraries, Western Washington University, Bellingham, WA 98225-9103, USA (360-650-7534; heritage.resources@wwu.edu) and refer to the collection name and identifier. Any materials cited must be attributed to the Salish Sea Ecosystem Conference Records, University Archives, Heritage Resources, Western Libraries, Western Washington University.

Language

English

Format

application/pdf

Type

Text

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Apr 30th, 10:30 AM Apr 30th, 12:00 PM

PCBs Associated with Suspended Solids in the Green River Basin

Room 608-609

Sources of PCBs to the Lower Duwamish Waterway Superfund Site include the urban drainage basin as well as inputs from upstream portions of the Green River Watershed, which are likely a long-term source of these contaminants to the waterway. To better understand contaminants in the upper watershed, suspended solids samples were collected from four major tributaries to the Green River (Newaukum, Soos and Mill Creeks and the Black River), as well as at two locations on the main stem Green River: an upstream location at Flaming Geyser State Park and a downstream location at Foster Links Golf Course. Two collection methods were used: sediment traps and filtered solids collected by pumping water through filter bags. The sediment traps were deployed for approximately three months over a year-long period. The filtered solids were collected over a 24-hour periods during both baseflow and storm event conditions with a target of one baseflow event and five storm events. While all samples were analyzed for PCBs, polycyclic aromatic hydrocarbons, arsenic and conventional parameters, this presentation will focus on the results for PCBs, grain size and total organic carbon.