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| Title | Stormwater Sediment Trap Monitoring of Discharges to Thea Foss Waterway | |||
| Month-Year Published | May 1997 | |||
| Online Availability |
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| Short Description |
In-line sediment traps were successfully deployed between September 1996 and January 1997 in three major stormwater discharges to Thea Foss Waterway (Foss Waterway) located in Commencement Bay, Tacoma, Washington. The primary objective of this investigation was to determine contaminant concentrations associated with particulates entering the waterway. These data are needed to refine source loading terms for Water Quality Analysis Simulation Program (WASP) modeling which is being conducted to evaluate the potential for recontamination of bottom sediments in Foss Waterway. (Also see abstract below) | |||
| Publication Number | 97-322 | |||
| Author(s) | Norton, D. | |||
| Print Availability | ||||
| Number of pages | 23 pp. + app (93 total) | |||
| Keywords | chemical, Commencement Bay, contaminant, discharge, hydrocarbons, model, monitoring, objectives, quality, sediment, Stormwater, water, water quality | |||
| Subject Waterbodies |
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| Abstract | Long Description |
In-line sediment traps were successfully deployed between September 1996 and January 1997 in three major stormwater discharges to Thea Foss Waterway (Foss Waterway) located in Commencement Bay, Tacoma, Washington. The primary objective of this investigation was to determine contaminant concentrations associated with particulates entering the waterway. These data are needed to refine source loading terms for Water Quality Analysis Simulation Program (WASP) modeling which is being conducted to evaluate the potential for recontamination of bottom sediments in Foss Waterway. Data collected indicated that concentrations of nineteen individual chemicals exceeded the Commencement Bay Sediment Quality Objectives in the trapped particulates. The majority of the measured exceedances were for polynuclear aromatic hydrocarbons (especially HPAH) and phthalates. The greatest number of exceedances (20) were measured in the 15th Street drain which discharges to the central portion of the waterway. |
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