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| Title | Spokane River Basin Class II Inspection at the Liberty Lake Wastewater Treatment Plant | |||
| Month-Year Published | April 1994 | |||
| Online Availability |
892 kilobytes, requires version 4.0 or later of Adobe Acrobat Reader Software get Acrobat Reader
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| Short Description |
Announced Class II Inspections were conducted at three industrial wastewater treatment plants (WWTPs) and two municipal WWTPs in the Spokane River basin during March 22-24, 1993. A separate inspection report was written for each discharger in the basin. This report is based on the inspection conducted at the Liberty Lake Sewer District WWTP. (Also see abstract below) | |||
| Publication Number | 94-55 | |||
| Author(s) | Das, T. | |||
| Print Availability |
Not maintained in stock. Copy must be made from archive version.
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| Number of pages | 11 pp. | |||
| Keywords | basin, BOD5, chemical, chemical oxygen demand, copper, effluent, fecal coliform, Inspection, inspections, lake, lead, metals, pH, receiving water, river, SEPA, site investigation, Spokane River, study, total residual chlorine, total suspended solids, toxic, toxicity, treatment, TSS, waste, wastewater, wastewater treatment plant, water, water quality, zinc | |||
| Subject Waterbodies |
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| Abstract | Long Description |
Announced Class II Inspections were conducted at three industrial wastewater treatment plants (WWTPs) and two municipal WWTPs in the Spokane River basin during March 22-24, 1993. A separate inspection report was written for each discharger in the basin. This report is based on the inspection conducted at the Liberty Lake Sewer District WWTP. The plant was operating well at the time of inspection and met permit requirements for five-day biochemical oxygen demand (BOD5), total suspended solids (TSS), fecal coliform, and pH. However, the effluent concentration exceeded the daily maximum limit for total residual chlorine on March 22. Removal efficiencies for BOD5 and TSS were much higher than the 85% requirement. Effluent lead concentrations exceeded the chronic water quality criterion. Copper and zinc concentrations exceeded both acute and chronic water quality criteria. A concurrent metals study is also progressing in the Spokane River basin, and it should provide greater insight concerning effluent metals toxicity in the receiving water. Other minor recommendations are included in this report. |
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