esm223_05_Other_Reading_Wisconsin_Field_Procedures_Manual -...

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Unformatted text preview: ------------------------------------------------------------------------ WI DNR Field Procedures Manual Part B: Collection Procedures ------------------------------------------------------------------------ 701.1 PLANNING AND BACKGROUND INFORMATION FOR A SEDIMENT SURVEY 1. _Introduction_ Contaminated sediments are a chronic and sometimes toxic problem affecting some of Wisconsin's inland lakes and streams and Great Lakes coastal areas, especially where industrial and other human activity has been most intense. Contaminated sediments can become a storage sink and possible resource for contaminants to be released to the environment. Suspended contaminated sediments can move through a water system to be deposited, sometimes over a wide area, in previously clean waters. Contaminants from sediments have been shown to move into the food chain, and thus be available for consumption by fish, wildlife and humans. Contaminants in sediments can also affect the base of the food chain by affecting existing resident biota communities. Specific consequences of contaminated sediments in the state of Wisconsin include for example: contaminated fish and the need for advisories on the consumption of these fish; reduced vitality and diversity of species in an ecosystem; restrictions on dredging activities and costly handling of dredge spoils; expense to businesses and the taxpayers for the remediation of contaminated sites; unpleasant aesthetics and reduced recreational useability of some water bodies. Although there are many adequate methods for sampling sediments, the intent of this guidance is to present the few most desirable methods to be used for sediment work performed for or by the Wisconsin Department of Natural Resources. The methods presented herein are, at this time, well standardized (i.e., EPA), reliable, effective, repeatable, and deemed most economical. Standardization of sediment assessment procedures should help increase the reliability and quality of the sediment data generated for Wisconsin waters, and will consequently benefit those who must use the data for decision making. This guidance presents information generally in the order in which one would approach a sediment assessment project. However, later stages of a project including sampling and analysis must be collectively considered in the initial planning stage to insure that all conditions for the assessment and data quality will be met throughout the study. A well planned assessment is most likely to produce complete and reliable data. 2. _Planning a Sediment Survey_ 1. Scope The goal of this section is to provide a short summary of the Department's sediment assessment activities as well as a basic framework (including where to go for additional information) for designing and planning the types of sediment quality assessments most often carried out by the Department. In addition to what is presented here, much literature exists that describes in detail principles that should be followed during the planning of a sediment...
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esm223_05_Other_Reading_Wisconsin_Field_Procedures_Manual -...

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