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| Title | The Effect of the Everett WTP on Water Quality in the Snohomish River Estuary. | |||
| Month-Year Published | July 1987 | |||
| Online Availability |
2921 kilobytes, requires version 4.0 or later of Adobe Acrobat Reader Software get Acrobat Reader
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| Short Description |
The existing Everett Wastewater Treatment Plant discharge zone provides minimal initial dilution of effluent due to inadequate depth and lack of a diffuser. (Also see abstract below) | |||
| Publication Number | 87-e07 | |||
| Author(s) | Determan, T. | |||
| Print Availability |
Not maintained in stock. Copy must be made from archive version.
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| Number of pages | 50 pp. | |||
| Keywords | dilution zone, flow, guidelines, lead, quality, river, Snohomish River, treatment, waste, wastewater, wastewater treatment plant, water, water quality, WTP | |||
| Subject Waterbodies |
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| Abstract | Long Description |
The existing Everett WTP discharge zone provides minimal initial dilution of effluent due to inadequate depth and lack of a diffuser. Total chlorine residual at NPDES permit levels may exceed acute-toxicity criteria within the existing discharge zone. Tide-induced multiple-dosing of the receiving water by WTP effluent appears to be insignificant. Water quality criteria can be met under maximum permitted WTP flow and minimum receiving water flow if complete dilution occurs. The two-outfall, equal-flow discharge option proposed for WTP upgrade compliance with Ecology Dilution Zone Guidelines is unlikely. The WTP may be a source of lead for receiving water sediments. However, metals in sediments are within acceptable levels. |
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