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| Title | Quality Assurance Project Plan: Investigation of Background Concentrations of Organic and Inorganic Arsenic in Freshwater Fish Tissue in Four Washington Lakes | |||
| Month-Year Published | September 2002 | |||
| Online Availability |
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| Short Description |
This study plan describes the rationale and methods for characterizing inorganic and organic arsenic in freshwaters and associated fish tissues from four lakes throughout Washington State. The appropriate definition of natural conditions will assist in describing the magnitude of ambient arsenic in waters and fish. The form arsenic takes in the environment is important because different arsenic species have markedly varying toxicities. (Also see abstract below) | |||
| Publication Number | 02-03-075 | |||
| Author(s) | Jack, R. | |||
| Print Availability | ||||
| Number of pages | 24 pp. | |||
| Keywords | arsenic, fish, investigation, lake, plan, quality assurance, quality assurance project plan, study, tissue, toxic, water | |||
| Subject Waterbodies |
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| Related Publications | Title | Relationship | ||
| Investigation of Background Inorganic and Organic Arsenic in Four Washington Lakes | similar topic | |||
| Abstract | Long Description |
This study plan describes the rationale and methods for characterizing inorganic and organic arsenic in freshwaters and associated fish tissues from four lakes throughout Washington State. The appropriate definition of natural conditions will assist in describing the magnitude of ambient arsenic in waters and fish. The form arsenic takes in the environment is important because different arsenic species have markedly varying toxicities. Eight lakes have been identified for planning purposes; however, only four will be sampled. The availability of fish, by electroshocking and/or gill nets, will determine the final sampling locations. Samples will be collected for total and dissolved arsenic during two different seasons, for a total of four water samples from each lake. Water will be collected using a depth integrating sampler. Phytoplankton, a potential seasonal reservoir of arsenic, will be sampled twice from each lake, once in the summer and again in the late fall. The phytoplankton data will determine if seasonal cycling is potentially occurring. If so, this media may require further evaluation and/or future water sampling may need to account for seasonal phytoplankton uptake or release. Two sediment grabs will be collected immediately after the water sampling. Two different fish species will be sampled. One will be a salmonid and the other a species of opportunity based upon availability. In general, larger specimens will be emphasized. No anadromous or species stocked within the past five years will be sampled. Equal weight aliquots of descaled, skin-on fillet tissue will be mixed into equal sized composites and analyzed for organic and inorganic arsenic species. More complex arsenosugars and arsenobetaine will not be analyzed, but tissues will be archived for this possible future analysis. |
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