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| Title | Sumas River Receiving Water Study | |||
| Month-Year Published | October 1992 | |||
| Online Availability |
1418 kilobytes, requires version 4.0 or later of Adobe Acrobat Reader Software get Acrobat Reader
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| Short Description |
A survey of the Sumas River was conducted from September 24-25, 1992, to assess the impact of the city of Sumas Wastewater Treatment Plant (WTP) effluent on the river. (Also see abstract below) | |||
| Publication Number | 92-e07 | |||
| Author(s) | Cusimano, B. | |||
| Print Availability |
Not maintained in stock. Copy must be made from archive version.
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| Number of pages | 28 pp. | |||
| Keywords | ammonia, biological, BOD5, creek, dissolved oxygen, effluent, fecal coliform, flow, nitrogen, nonpoint, pH, phosphorus, point source, receiving water, river, stream, study, temperature, TMDL, total residual chlorine, wastewater treatment plant, water, water quality | |||
| Subject Waterbodies |
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| Abstract | Long Description |
A survey of the Sumas River was conducted from September 24-25, 1992, to assess the impact of the city of Sumas Wastewater Treatment Plant (WTP) effluent on the river. The receiving water study identified an effluent dilution of about 250:1, which is projected to drop to 71:1 under annual (7Q10) and summer (7Q20) design flow conditions. Fecal coliform concentrations above the WTP exceeded the water quality criterion for Class A waters, and nitrogen loadings from Johnson Creek were high, likely due to agricultural nonpoint sources. Under the survey conditions, WTP effluent did not affect downstream temperature, dissolved oxygen, or pH, however, phosphorus concentrations were altered by the effluent. Worst-case modeling predicted water quality violations for total residual chlorine (TRC) under all design conditions, and dissolved oxygen under summer design conditions. TMDL, WLAs, and LAs were recommended for ammonia, biological oxygen demand (BOD5), TRC, and fecal coliform. |
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This page last updated August 17, 2011
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