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| Title | Snohomish Wastewater Treatment Plant Class II Inspection - September 20-21, 1992 | |||
| Month-Year Published | March 1993 | |||
| Online Availability |
2441 kilobytes, requires version 4.0 or later of Adobe Acrobat Reader Software get Acrobat Reader
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| Short Description |
A Class II Inspection was conducted in September 1992 at the city of Snohomish Wastewater Treatment Plant in Snohomish County. The Snohomish facility is a facultative lagoon system which discharges into the Snohomish River. The inspection data found the Snohomish facility was producing a fairly good effluent quality. Effluent concentrations were within the NPDES permit limitations with the exception of the monthly BOD5 average concentration. Flow was well within the design criteria specified in the permit, but BOD5 was approaching criteria. (Also see abstract below) | |||
| Publication Number | 93-e59 | |||
| Author(s) | Stasch, P. | |||
| Print Availability |
Not maintained in stock. Copy must be made from archive version.
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| Number of pages | 47 pp. | |||
| Keywords | bioassay, BOD5, copper, county, effluent, flow, Inspection, metals, NPDES, priority pollutant, quality, river, silver, site investigation, Snohomish River, toxic, toxicity, treatment, waste, wastewater, wastewater treatment plant, water | |||
| Subject Waterbodies |
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| Abstract | Long Description |
A Class II Inspection was conducted in September 1992 at the city of Snohomish Wastewater Treatment Plant in Snohomish County. The Snohomish facility is a facultative lagoon system which discharges into the Snohomish River. The inspection data found the Snohomish facility was producing a fairly good effluent quality. Effluent concentrations were within the NPDES permit limitations with the exception of the monthly BOD5 average concentration. Flow was well within the design criteria specified in the permit, but BOD5 was approaching criteria. Effluent priority pollutant concentrations were generally less than the USEPA Quality Criteria for Water. Two metals, copper and silver, exceeded the freshwater chronic toxicity criteria by a small margin. The bioassays documented little toxicity in the effluent. |
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