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| Title | Inland Empire Paper Company Mixing Zone Survey, September 1990 | |||
| Month-Year Published | February 1992 | |||
| Online Availability |
2030 kilobytes, requires version 4.0 or later of Adobe Acrobat Reader Software get Acrobat Reader
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| Short Description |
A survey was conducted in September 1990, on the Spokane River to evaluate compliance of the Inland Empire Paper (IEP) Compnay wastewater discharge with water quality and dimensional mixing zone criteria. IEP effluent was meeting recently expired NPDES permit limits. (Also see abstract below) | |||
| Publication Number | 92-e40 | |||
| Author(s) | Joy, J. | |||
| Print Availability |
Not maintained in stock. Copy must be made from archive version.
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| Number of pages | 39 pp. | |||
| Keywords | aluminum, copper, effluent, lead, mercury, mixing zone, NPDES, river, Spokane River, study, temperature, toxicity, water, water quality | |||
| Subject Waterbodies |
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| Abstract | Long Description |
During September 1990, a survey was conducted on the Spokane River to evaluate compliance of the Inland Empire Paper (IEP) Company wastewater discharge with water quality and dimensional mixing zone criteria. IEP effluent was meeting recently expired NPDES permit limits. Dye and water quality samples indicated IEP effluent aluminum, copper, lead, and mercury concentrations were adequately diluted, and met chronic toxicity criteria within the mixing zone. CORMIX2 and UDKHDEN mixing zone model simulations compared well to field dye study results. Field data and model simulation results indicated the IEP discharge system was complying with the mixing zone standards set under a settlement agreement. CORMIX2 simulations predicted poorer mixing with a lower effluent temperature, or a greater effluent volume. A possible problem with far-field D.O. concentrations in the Upriver Dam pool was also explored with a QUAL2E model simulation. Several recommendations were made. |
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