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| Title | Metals Concentrations in Commencement Bay Waterways During 1997 - 1998 | |||
| Month-Year Published | February 1999 | |||
| Online Availability |
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| Short Description |
Zinc, copper, arsenic, cadmium, lead, mercury, chromium, and nickel were analyzed in surface and deep water samples from three waterways in Commencement Bay and in the main bay during 1997-98. The data were analyzed for differences in metals concentrations between waterways and with depth, and compared to water quality criteria, historical data, and Puget Sound background. The fraction of dissolved metals was calculated and compared to EPA conversion factors used for setting metals limits in NPDES permits. (Also see abstract below) | |||
| Publication Number | 99-308 | |||
| Author(s) | Johnson, A., J. Summers | |||
| Print Availability | ||||
| Number of pages | 50 pp. + app. (66 total) | |||
| Keywords | cadmium, chromium, cleanup, copper, lead, mercury, metals, methods, NPDES, order, Puget Sound, results, water, water quality, zinc | |||
| Subject Waterbodies |
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| Abstract | Long Description |
Zinc, copper, arsenic, cadmium, lead, mercury, chromium, and nickel were analyzed in surface and deep water samples from three waterways in Commencement Bay and in the main bay during 1997-98. Clean sampling techniques and low-level methods of analysis were used. The data were analyzed for differences in metals concentrations between waterways and with depth, and compared to water quality criteria, historical data, and Puget Sound background. The fraction of dissolved metals was calculated and compared to EPA conversion factors used for setting metals limits in NPDES permits. Results showed all metals concentrations were well within criteria for protection of aquatic life. Cleanups have resulted in substantial water quality improvements in Blair and Hylebos Waterways, where arsenic and zinc concentrations are an order of magnitude lower than in the 1980s. |
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