Dredged material/sediment

In situ methods have potential use as an interim or emergency measure until dredging can be undertaken or as a primary remedial action where it is determined to be more cost-effective than removal. The biggest advantages are that they are much less costly than dredging, eliminate the need for dredged material management, and minimize the resuspension of contained sediments.15... 

INTEGRATED STUDIES Freshwater lake near Amsterdam, the Netherlands near dredged materials discharge site Sediments ... 

There is a potential for endrin to be present in soils and sediments at hazardous waste sites. Endrin has been detected in soil samples collected at 44 of the 102 NPL sites and in sediment samples collected at 19 of the 102 NPL sites where endrin has been detected in some environmental medium however, concentrations were not reported (HazDat 1996). Endrin was not detected (detection limit 0.01 ppm [10 ppb] wet weight), however, in soils derived from dredged materials at 9 confined disposal facilities bordering the Great Lakes (Beyer and Stafford 1993). 

Ocean Data Evaluation System (ODES) Data Submissions Manual QA/QC Guidance for Sampling and Analysis of Sediments Water and Tissue for Dredged Material Evaluations Chemical Evaluations Quality Assurance Plan for the National Pesticide Survey of Drinking Water Wells Analytical Method 2, Chlorinated Pesticides Quality Assurance Project Plan for Analytical Control and Assessment Activities in the National Study of Chemical Residues in Lake Fish Tissue... 

The aim of the present study was to identify the DR CALUX bioassay performance criteria for the analysis of PHAHs in sediment samples in order to implement the bioassay in the assessment of dredged materials for systematic monitoring in the eoming years. Therefore, both an intra-and interlaboratory validation study was performed. 

Table 2 Action levels (AL) applied in the Chemical Toxicity Test (CTT) system to judge whether dredged material from Dutch harbours can be disposed at sea. Underlined values exceeds the AL threshold. The three bioassays in the marked Box are evaluated in Table 3. Loswal Noord is the Reference station where harbour sediments are dumped. 

Dioxins are very persistent organic pollutants that are present in harbours as by-produets of ineomplete combustion and industrial processes (Besselink et al., 2004). Dioxins in sediments are not aeutely toxic, but are known to induce developmental, reproduetive and immune toxicity after ehronie exposure at low levels. In the licensing system for qualifying dredged material for... 

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