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| Title | Results of Pesticide/PCB Monitoring in Chambers/Clover Creek Drainage. Memorandum to Bob Duffy, SWRO, March 15, 1996. | |||
| Month-Year Published | March 1996 | |||
| Online Availability |
5795 kilobytes, requires version 4.0 or later of Adobe Acrobat Reader Software get Acrobat Reader
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| Short Description |
Seven herbicides and two organophosphorus insecticides were detected in water samples collected from Chambers Creek near Steilacoom and Clover Creek above Steilacoom Lake during June, August, and October, 1995. The only compounds identified on more than one occasion were the herbicides 2,4-D and dichlobenil (Casoron), and the insecticide parathion (by way of a degradation product). A tissue sample from marine mussels at the mouth of Chambers Creek contained detectable levels of several of the older chlorinated pesticides or their metabolites (DDE, dieldrin, chlordane, and nonachlor) as well as polychlorinated biphenyls (PCBs). (Also see abstract below) | |||
| Publication Number | 96-e07 | |||
| Author(s) | Johnson, A. | |||
| Print Availability |
Not maintained in stock. Copy must be made from archive version.
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| Number of pages | 9 pp. + app (121 total) | |||
| Keywords | bill, creek, herbicide, lake, marine, monitoring, PCBs, pesticides, Puget Sound, results, water, water quality | |||
| Subject Waterbodies |
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| Abstract | Long Description |
Seven herbicides and two organophosphorus insecticides were detected in water samples collected from Chambers Creek near Steilacoom and Clover Creek above Steilacoom Lake during June, August, and October, 1995. The only compounds identified on more than one occasion were the herbicides 2,4-D and dichlobenil (Casoron), and the insecticide parathion (by way of a degradation product). A tissue sample from marine mussels at the mouth of Chambers Creek contained detectable levels of several of the older chlorinated pesticides or their metabolites (DDE, dieldrin, chlordane, and nonachlor) as well as polychlorinated biphenyls (PCBs). Pesticide concentrations in the water and tissue samples were less than 1 part per billion, which is too low to represent a water quality concern. The total PCB concentration of 8 ug/Kg (ppb) found in the mussel sample, although not unusually elevated for Puget Sound mussels or other harvested species, is sufficiently high to put Chambers Creek on the 303(d) water quality limited list for exceeding the human health edible tissue criterion of 1.4 ug/Kg. |
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