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| Title | Contaminants Associated with Settling Particulate Matter and Bottom Sediments at Two Marinas in Thea Foss Waterway | |||
| Month-Year Published | June 2001 | |||
| Online Availability |
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| Short Description |
Settling particulate matter (SPM) and bottom sediments were collected at two marinas in Thea Foss Waterway, Commencement Bay, Tacoma, Washington, between September 1999 and February 2000. The samples were analyzed for metals (copper, lead, mercury, zinc), semivolatile organics, and butyltins. These data were needed to refine contaminant flux estimates for marinas in order to model the potential for sediment recontamination in the waterway. This information was also needed to evaluate the need for further source control activities related to marinas. (Also see abstract below) | |||
| Publication Number | 01-03-023 | |||
| Author(s) | Norton, D. | |||
| Print Availability | ||||
| Number of pages | 26 pp. + app (72 total) | |||
| Keywords | contaminant, disposal, lead, marina, model, objectives, order, particulate matter, Puget Sound, sediment, study, water, zinc | |||
| Subject Waterbodies |
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| Abstract | Long Description |
Settling particulate matter (SPM) and bottom sediments were collected at two marinas in Thea Foss Waterway, Commencement Bay, Tacoma, Washington, between September 1999 and February 2000. The samples were analyzed for metals (copper, lead, mercury, zinc), semivolatile organics, and butyltins. These data were needed to refine contaminant flux estimates for marinas in order to model the potential for sediment recontamination in the waterway. This information was also needed to evaluate the need for further source control activities related to marinas. In general, concentrations of most contaminants were higher at the head of the waterway near City Marina compared to the mouth near Totem Marina. In bottom sediments, 22 individual chemicals (primarily mercury, LPAHs, HPAHs, bis(2 ethyl hexyl)phthalate, and benzoic acid) were measured at concentrations above the Commencement Bay Sediment Quality Objectives (CMBSQO). A similar chemical suite (19) also exceeded the CMBSQO in SPM. Based on comparison with bulk sediment chemistry levels, tributyltin concentrations in all SPM and bottom sediment samples have the potential to exceed the Puget Sound Dredge Disposal Analysis recommended screening level of 0.15 ugTBT/L for interstitial water. Based on data collected in this study, there does not appear to be clear evidence that would isolate marinas as unique sources of these contaminants within Thea Foss Waterway. Consequently, the data most likely represent the combined flux of contaminants from all sources within the areas sampled. |
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