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Ecology Publications & Forms |
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Ecology Publications & Forms |
| Title | A Total Maximum Daily Load Evaluation for Arsenic in the Similkameen River |
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A Total Maximum Daily Load Evaluation for Arsenic in the Similkameen River (Number of pages: 124) (Publication Size: 3MB)
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| Author(s) | Johnson, A. | ||||
| Description | A TMDL evaluation was conducted for arsenic in the Similkameen River. The major source appears to be tailings from historical mining activity in British Columbia between Hedley and the U.S. border. The only significant sources identified in Washington were: 1) Palmer Lake, likely arising from periodic flooding by the Similkameen River and perhaps inputs from Sinlahekin Creek, and 2) resuspension of contaminated sediments. It was determined that the Similkameen naturally exceeds EPA human health criteria for arsenic upstream of Hedley. Water quality targets of 0.4 - 0.6 ug/L total recoverable arsenic are therefore proposed and estimates provided of the load reductions needed to meet the targets. An arsenic monitoring plan is suggested. |
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| Contact | EAP Publications Coordinator at 564-669-3028 or EAPpubs@ecy.wa.gov | ||||
| Keywords | creek, flow, fish, 303(d), section 303, evaluation, study, river, plan, water, water quality, Total Maximum Daily Load, lake, flood, arsenic | ||||
| WATERSHED | Water Resource Inventory Area 49 Okanogan | ||||
| DATA | Environmental Information Management (EIM) #AJOH0016 |
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| RELATED PUBLICATIONS | Title:
Effects of Small-Scale Gold Dredging on Arsenic, Copper, Lead, and Zinc Concentrations in the Similkameen River Quality Assurance Project Plan: Effects of Small-Scale Gold Dredging on Metals Concentrations in the Similkameen River Lower Similkameen River Arsenic Total Maximum Daily Load: Submittal Report |
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