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| Title | City of Lynnwood WTP Class II Inspection | |||
| Month-Year Published | November 1992 | |||
| Online Availability |
1590 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 at the city of Lynnwood Wastewater Treatment Plant on June 17-19, 1991. The effluent met NPDES permit requirements. (Also see abstract below) | |||
| Publication Number | 92-e17 | |||
| Author(s) | Das, T. | |||
| Print Availability |
Not maintained in stock. Copy must be made from archive version.
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| Number of pages | 22 pp. + app (32 total) | |||
| Keywords | bioassay, BOD5, effluent, flow, metals, NPDES, PCBs, pesticides, priority pollutant, sand, silver, site investigation, stream, toxicity, wastewater treatment plant | |||
| Subject Waterbodies |
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| Abstract | Long Description |
A Class II Inspection was conducted at the city of Lynnwood Wastewater Treatment Plant on June 17-19, 1991. The effluent met NPDES permit requirements. A few priority pollutant compounds were found in WTP effluent, but levels were not sufficiently high to be a cause of concern. No pesticides/PCBs or VOCs were found in the effluent. Three BNA compounds were detected in the effluent stream but were judged to be of little or no concern. No whole effluent toxicity was indicated by rainbow trout and fathead minnow. However, toxicity to Ceriodaphnia dubia was very evident: the 7-day survival and reproduction test resulted in 100% mortality in all dilutions of effluent. Also, some chronic toxicity was indicated by the echinoderm sand dollar sperm fertilization and inland silverside minnow bioassays. Among priority pollutant metals, barium was detected in sludge cake and ash leachate samples, but below the hazardous waste regulatory level. Influent BOD5 load and flow exceeded 85% of design criteria. |
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