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| Title | Quality Assurance Project Plan: TMDL Technical Assessment of DDT and PCBs in the Okanogan River | |||
| Month-Year Published | August 2002 | |||
| Online Availability |
516 kilobytes, requires version 4.0 or later of Adobe Acrobat Reader Software get Acrobat Reader
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| Short Description |
Objectives of this project include assessing DDT and PCB loads to the Okanogan River and Osoyoos Lake, assessing DDT and PCB concentrations in edible fish tissue, reconstructing historic DDT and PCB deposition patterns, and, to the extent possible, predicting future DDT and PCB concentrations in fish tissues. The ultimate goal of the project is to determine where DDT/PCB loading may be reduced and how this may affect concentrations in fish tissue. (Also see abstract below) | |||
| Publication Number | 02-03-070 | |||
| Author(s) | Serdar, D. | |||
| Print Availability | ||||
| Number of pages | 39 pp. + app (57 total) | |||
| Keywords | assessment, basin, Columbia River, fish, flow, lake, objectives, Okanogan River, PCBs, plan, quality assurance, quality assurance project plan, river, study, technical, TMDL, tribe, water | |||
| Subject Waterbodies |
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| Related Publications | Title | Relationship | ||
| TMDL Technical Assessment of DDT and PCBs in the Lower Okanogan River Basin | similar topic | |||
| Abstract | Long Description |
The Okanogan River is a large Columbia River drainage with a basin covering a total area of approximately 8,900 mi2 in north-central Washington and British Columbia. Approximately 2,600 mi2 of the basin is in Washington (lower basin) where the mainstem Okanogan River flows out of Osoyoos Lake 79 miles southward to its confluence with the Columbia River. One segment of the Okanogan River, Osoyoos Lake, and several tributaries to the Okanogan River have been included on the 1998 Clean Water Act Section 303(d) list due to the presence of DDT in fish and water samples. One Okanogan River segment is also listed for PCBs due to their presence in fish tissue. A total maximum daily load (TMDL) has been identified as the action initially needed to bring these waterbodies into compliance with state and federal water quality standards. This study plan identifies the data needed to assess loading of DDT and PCBs in the Okanogan River, Osoyoos Lake, and their tributaries. Objectives of this project include assessing DDT and PCB loads to the Okanogan River and Osoyoos Lake, assessing DDT and PCB concentrations in edible fish tissue, reconstructing historic DDT and PCB deposition patterns, and, to the extent possible, predicting future DDT and PCB concentrations in fish tissues. The ultimate goal of the project is to determine where DDT/PCB loading may be reduced (including loading from sediments) and how this may affect concentrations in fish tissue. Samples of edible fish tissue, surface sediments, sediment cores, surface water, and municipal treatment plant sludge's will be collected and analyzed as part of the project. Data available from other agencies such as B.C. Ministry of the Environment and the Colville Confederated Tribes will also be summarized as part of the project. |
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