Download or read book Sediment Quality and Dredging Activities in the St Lawrence River written by Lucie Olivier and published by . This book was released on 1993 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report is an evaluation of the sediment quality of the St. Lawrence River. Where possible, trends in changes that may have occurred between 1976 and 1989 have been determined. Seven metals were focused on: cadmium, chromium, copper, mercury, nickel, lead and zinc. Sites at which heavy metals were the highest are identified and, whenever possible, related to toxic inflows from the River's international section, priority industries, tributaries and riverside municipalies.
Download or read book Background Contaminant Levels in Preindustrial Sediments of the St Lawrence River written by Isabelle Saulnier and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Preindustrial marine clays, often dredged in the maritime seaway, represent a concern for the environment management as they are considered potentially toxic with regards of the sediment quality criteria. A research project was initiated in 1999, at the St. Lawrence Centre, to better document the background levels of target chemicals in these "uncontaminated" sediments. The results highlight the association of Cr and Ni to the inert silicate fraction of marine clay sediments, whereas Cd, Pb, Zn as well as Cd and Hg display generally an affinity towards more reactive phases of the sediment. The latter trace metals in these sediments are not an issue for dredged material management as their levels are always close to the no-effect level. Future results will include normalization of trace metal concentrations with organic carbon content, grain size distribution and conservative elements such as Al and Li, for a better application of the criteria to preindustrial marine clays.
Download or read book Contaminated Sediment Guide to Selecting and Operating Dredging Equipment and Related Practices written by Jacques Bérubé and published by [Montréal] : St. Lawrence Centre. This book was released on 1992 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Recommendations for the Management of Suspended Solids SS During Dredging Activities written by Québec (Province) and published by . This book was released on 2016 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The St. Lawrence River is a complex ecosystem whose properties change from its headwaters to its outlet. Opened in 1959, the St. Lawrence Seaway allows ocean-going vessels to travel from the Atlantic Ocean to the Great Lakes, a distance of more than 3200 km. To ensure safe navigation conditions, roughly 450 000 m3 of sediment are dredged annually in the St. Lawrence. One of the major concerns associated with dredging is the temporary increase in suspended solid (SS) concentrations, which can pose a threat to aquatic life. The surface water quality criteria adopted by the MDDELCC help protect aquatic life from the harmful effects of suspended solids. These quality criteria are used, in particular, to limit SS concentrations in wastewater effluents discharged into the environment. SS management criteria specific to dredging activities have now been identified, taking into account ambient SS concentrations observed in the St. Lawrence and SS concentrations measured in dredging situations"--Abstract, p. vi.
Download or read book Ecological Risk Assessment ERA of Open water Disposal of Sediment to Support the Management of Dredging Project in the St Lawrence River written by Gaëlle Triffault-Bouchet and published by . This book was released on 2012 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: The St. Lawrence River is subject to various anthropological pressures that can entail negative consequences for the ecosystem. As a result of the third and fourth St. Lawrence Action Plans, the current vision of sustainable management of this river and its main functions emphasizes the need for sound risk-based assessment approaches to support management decisions. More specifically, the sustainable navigation strategy, drawn up under St. Lawrence Action Plan III, explicitly identifies the need to develop sediment quality assessment tools, including those derived from ecotoxicological studies. The first management option addressed in this perspective was the open-water disposal of dredged sediments. In this context, an ecotoxico-logical risk assessment (ERA) approach using chemical characterization in Tier 1 and benthic organisms' toxicity tests in Tier 2 was elaborated based on physicochemical, toxicity testing, and benthic community structure data acquired from sediment samples collected in 59 sites along the St. Lawrence River. Hence this ERA approach will be used to determine whether the risk posed by the exposure of benthic organisms to dredged sediments at deposit sites and downstream is acceptable and compatible with open-water disposal.
Download or read book Problems Associated with Dredging Operations on the St Lawrence written by René Rochon and published by . This book was released on 1985 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: Scientific documentation on sediment chemistry and the contamination potential of open-water disposal of dredged material are criticallly reviewed and summarized in this report. Analyses, comparisons and recommendations are made on techniques for possible use in dredging projects. The most important limitations of these techniques are described. Recommendations are made for the establishment of priorities for future research on dredging projects, particularly those on the St. Lawrence River.
Download or read book Sediment Sampling Guide for Dredging and Marine Engineering Projects in the St Lawrence River written by St\AN226\ephane Lorrain and published by Montréal : Environmental Protection Branch, Environment Canada, Quebec Region. This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This document is intended to help proponents & managers of dredging & marine engineering projects to design & implement sediment sampling plans that satisfy concerns about the physical & chemical characterization of sediments. The introduction describes the relevance of this guide & the context in which it was written. Chapter 2 introduces the principal objective of sediment characterization studies and discusses factors that may affect the informational value of the samples. The third chapter covers the planning of sampling operations, including development of a specific sampling approach, and explains the main components of a study design. The last chapter describes how to develop a quality assurance & control program. Appendices include statistical formulas for calculating sample size, a table showing numbers of samples required for dredging projects of different sizes, and an alternative approach for evaluating environmental sampling effort based on the use of Bayesian mathematics.
Download or read book Orientation Document on Integrated Management of Dredging on the St Lawrence River Supporting Document for the Sustainable Navigation Strategy of the Navigation Consensus Building Committee written by St. Lawrence Vision 2000 (Canada) and published by [Sainte-Foy, Québec] : Saint-Laurent Vision 2000. This book was released on 2004 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sediment Quality in the St Lawrence River in the Quebec Sector in 2012 and Its Evolution Since 1989 written by Margella Pelletier and published by . This book was released on 2018 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Monitoring the State of the St Lawrence River Toxic Contamination in Sediments Lake Saint Fran ois a Century old Story written by Canada. Environment Canada and published by Sainte-Foy, Québec : St. Lawrence Vision 2000. This book was released on 2002 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Field operations manual written by Stéphane Lorrain and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Environmental Impacts of Dredging and Sediment Disposal written by Canada. Dept. of the Environment. Environmental Protection Br and published by . This book was released on 1994 with total page 97 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Great Lakes St Lawrence Seaway Navigation Extension written by and published by . This book was released on 1979 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sediment Sampling Guide for Dredging and Marine Engineering Projects in the St Lawrence River Planning guidelines written by Stéphane Lorrain and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book St Lawrence River Environmental Investigations written by Ontario. Great Lakes Section and published by . This book was released on 1988 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sediment Dredging at Superfund Megasites written by National Research Council and published by National Academies Press. This book was released on 2007-11-30 with total page 317 pages. Available in PDF, EPUB and Kindle. Book excerpt: Some of the nation's estuaries, lakes and other water bodies contain contaminated sediments that can adversely affect fish and wildlife and may then find their way into people's diets. Dredging is one of the few options available for attempting to clean up contaminated sediments, but it can uncover and re-suspend buried contaminants, creating additional exposures for wildlife and people. At the request of Congress, EPA asked the National Research Council (NRC) to evaluate dredging as a cleanup technique. The book finds that, based on a review of available evidence, dredging's ability to decrease environmental and health risks is still an open question. Analysis of pre-dredging and post-dredging at about 20 sites found a wide range of outcomes in terms of surface sediment concentrations of contaminants: some sites showed increases, some no change, and some decreases in concentrations. Evaluating the potential long-term benefits of dredging will require that the U.S. Environmental Protection Agency step up monitoring activities before, during and after individual cleanups to determine whether it is working there and what combinations of techniques are most effective.
Download or read book Sediment Sampling Guide for Dredging and Marine Engineering Projects in the St Lawrence River Field Operations manual written by Stéphane Lorrain and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
