|
|
|
|
Ecology Publications & Forms |
|
|
|
|
|
Ecology Publications & Forms |
| Title | Spokane River PCBs in Biofilm, Sediment, and Invertebrates, 2018 and 2019: Screening Study Results |
||||
|
|||||
| VIEW NOW |
Spokane River PCBs in Biofilm, Sediment, and Invertebrates, 2018 and 2019: Screening Study Results (Number of pages: 83) (Publication Size: 4631KB)
|
||||
| Author(s) | Era-Miller, B. and S. Wong | ||||
| Description | In August 2018, the Washington State Department of Ecology (Ecology) measured PCBs in biofilm, sediment, and caddisflies in the Spokane River. In August 2019, Ecology sampled additional biofilm. A combination of comparing total PCB concentrations, as well as homologs and congener patterns, across monitoring locations allowed Ecology researchers to identify new source areas of PCBs and to confirm suspected PCB source areas to the river. The highest levels of PCBs in biofilm came from the Mission Reach, a 2.5-kilometer section of the Spokane River between East Mission Avenue Bridge and Gonzaga University. Homolog and congener patterns suggest multiple sources of Aroclors in the Mission Reach, with Aroclors 1254 and 1260 dominating. Seven other source areas were found to be much lower for PCBs in biofilm compared to the Mission Reach but still elevated relative to background reference locations. Sediments were collected at three locations. Sediment PCBs were highest at the downstream end of the Mission Reach, near Gonzaga. PCB congener patterns in both sediments and biofilm from Plantes Ferry closely matched, indicating the strength of the Aroclor 1242/1248 signal in the river there. Caddisflies were collected at two locations. Comparison of the congener patterns and stable nitrogen isotope 15N between the biofilm and caddisflies indicated that PCBs metabolize in caddisflies much more than in biofilm. |
||||
| REQUEST A COPY
|
The mission of the Department of Ecology is to protect, preserve, and enhance Washington’s environment. To help us meet that goal, please consider the environment before you print or request a copy.
ADA Accessibility The Department of Ecology is committed to providing people with disabilities access to information and services by meeting or exceeding the requirements of the Americans with Disabilities Act (ADA), Section 504 and 508 of the Rehabilitation Act, and Washington State Policy #188. Visit Ecology’s website for more information. |
||||
| Contact | Brandee Era-Miller at 360-407-6764 or Bera461@ecy.wa.gov | ||||
| Keywords | biofilm, invertebrates, toxics monitoring, Spokane River, sediment, PCBs | ||||
| WEB PAGE | Spokane River multi-parameter TMDL | ||||
| WATERSHED | Water Resource Inventory Areas (WRIA 54,WRIA 57) |
||||
| DATA | Environmental Information Management (EIM) #SWON0001 |
||||
| RELATED PUBLICATIONS | Title:
Addendum to Quality Assurance Project Plan for Measuring PCBs in Biofilm, Sediment, and Invertebrates in the Spokane River: Screening Study Quality Assurance Project Plan: Measuring PCBs in Biofilm, Sediment, and Invertebrates in the Spokane River: Screening Study |
Copyright © Washington State Department of Ecology. See https://ecology.wa.gov/About-us/Accountability-transparency/Our-website/Copyright-information.
|