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| Title | Tacoma Central Wastewater Treatment Plant Class II Inspection, June 26-28, 1989 | |||
| Month-Year Published | June 1990 | |||
| Online Availability |
2456 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 June 26-28, 1989, at the Tacoma Central Wastewater Treatment Plant. The effluent was within permit limitations during the inspection. (Also see abstract below) | |||
| Publication Number | 90-e01 | |||
| Author(s) | Andreasson, J. | |||
| Print Availability |
Not maintained in stock. Copy must be made from archive version.
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| Number of pages | 60 pp. | |||
| Keywords | ammonia, bacteria, bioassay, BOD5, chemical, chemical oxygen demand, Commencement Bay, copper, cyanide, effluent, fecal coliform, outfall, receiving water, river, site investigation, total suspended solids, toxicity, TSS, wastewater treatment plant, water, water quality | |||
| Subject Waterbodies |
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| Abstract | Long Description |
A Class II Inspection was conducted on June 26-28, 1989, at the Tacoma Central Wastewater Treatment Plant. The effluent was within permit limitations during the inspection. Copper and cyanide in the effluent exceeded acute water quality criteria for saltwater. Ammonia exceeded chronic criteria for saltwater. Effluent bioassay test results showed moderate acute toxicity to Microtox, moderate chronic toxicity to fathead minnow, and significant chronic toxicity to echinoderm. A recent upgrade to secondary treatment has resulted in a major reduction in the loading of biochemical oxygen demand (BOD5), total suspended solids (TSS), and fecal coliform bacteria to the receiving water. The current quality of water in the Puyallup River, following a recent relocation of the WTP outfall from the river to Commencement Bay, is compared to that shown in earlier studies. |
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