Ecology Publications & Forms
TMDL Technical Assessment of DDT and PCBs in the Lower Okanogan River Basin
TMDL Technical Assessment of DDT and PCBs in the Lower Okanogan River Basin (Number of pages: 142) (Publication Size: 2MB)
|Prompted by elevated concentrations in fish tissues, a TMDL assessment was done for DDT and PCBs in the lower Okanogan River basin. Results indicate there is little external loading to the mainstem Okanogan River through tributaries or sewage treatment plants (STPs). Most tributaries and STPs are below load/waste load allocations needed to meet criteria. Contaminated sediments appear to be the primary source for accumulation in fish tissues Significant decreases in sediment DDT and PCB concentrations will be necessary to reduce fish tissue concentrations below criteria. Recommendations are made to augment data from Osoyoos Lake and in certain fish species.
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|recommendations, Okanogan River, investigation, contaminated, technical, toxics, results, sampling, environmental, fish, study, basin, river, plan, water, assessment, Ecology, waste, PCBs, pesticide, lake, contaminated sediment, DDT
|Water Resource Inventory Area 49 Okanogan
|Environmental Information Management (EIM) #DSER0009
Lower Okanogan DDT PCB Detailed Implementation Plan: Water Quality Implementation Plan
Lower Okanogan River Basin DDT and PCBs Total Maximum Daily Load: Submittal Report
Quality Assurance Project Plan: TMDL Technical Assessment of DDT and PCBs in the Okanogan River
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