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| Title | Edmonds Wastewater Treatment Plant Class II Inspection, April 17-19, 1989 | |||
| Month-Year Published | May 1990 | |||
| Online Availability |
2181 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 on April 17-19, 1989, at the Edmonds Wastewater Treatment Plant. The plant was providing primary treatment and was undergoing an upgrade to secondary treatment. (Also see abstract below) | |||
| Publication Number | 90-e00 | |||
| Author(s) | Andreasson, J. | |||
| Print Availability |
Not maintained in stock. Copy must be made from archive version.
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| Number of pages | 53 pp. | |||
| Keywords | ammonia, bioassay, BOD5, chemical, chemical oxygen demand, copper, cyanide, effluent, evaluation, fecal coliform, hydrocarbons, lead, mercury, outfall, oyster, pH, Puget Sound, quality, sediment, silver, site investigation, total suspended solids, toxicity, TSS, wastewater treatment plant, water, water quality, zinc | |||
| Subject Waterbodies |
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| Abstract | Long Description |
A Class II Inspection was conducted on April 17-19, 1989, at the Edmonds Wastewater Treatment Plant. The plant was providing primary treatment and was undergoing an upgrade to secondary treatment. At the time of the inspection, the effluent was within permit requirements for biochemical oxygen demand-5 day (BOD5), total suspended solids (TSS), and pH. Fecal coliform numbers were high, probably due to the sampling location and method used by Ecology. Copper, mercury, silver, lead, zinc, cyanide and un-ionized ammonia were found at levels above water quality criteria in the effluent. An acute (96-hour) effluent bioassay test on rainbow trout resulted in 100% mortality in 65% effluent. The effluent was also highly toxic to Microtox echinoderm and Pacific oyster. A sediment sample collected at the outfall in Puget Sound showed phenol and mercury to be above Ecology's Interim Sediment Quality Evaluation criteria. Several polyaromatic hydrocarbons were found at levels exceeding sediment criteria in the outfall and background samples. Sediment bioassay results did not indicate toxicity in the sediments. |
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