00000nam 2200000zi 4500 9.878353 CaOODSP 20241203113651 m o d f cr ||||||||||| 190821s1993 oncabd #ob f000 0 eng d CaOODSP eng rda CaOODSP n-cn-on En13-5/93-09E-PDF Zeman, Ales Jan, author. Subaqueous capping of very soft contaminated sediments / Alex J. Zeman. Burlington, Ontario : National Water Research Institute, Lakes Research Branch, [1993] 1 online resource (14 unnumbered pages) : illustrations, maps, graphs. text txt rdacontent computer c rdamedia online resource cr rdacarrier NWRI contribution ; 93-09 Title from caption. Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographical references. "A proposed 100-m x 100-m site for a subaqueous capping pilot-scale project in Hamilton Harbour is located in the water depth of about 15 m where the capping material will be in a relatively low-energy environment with little potential for erosion of the cap. The cap will consist of a 0.5-mm dia. clean sand and it will be placed on the bottom with a tremie pipe discharge system mounted on a spudded barge. The design thickness of 0.5 m will provide an effective isolation of contaminants from the overlying water and biota. Consolidation following the placement of the cap is estimated to occur within the period of about 10 to 50 days. The settlement of the cap surface will range from about 14 to 21 cm. Release of significant concentrations of contaminants due to rapid consolidation is unlikely. The results of a laboratory capping test, as well as theoretical results, suggest that the selected placement technique will not disturb very soft contaminated sediments. The effectiveness of the cap will be tested by physical, chemical and biological monitoring to ensure that the cap is placed as intended and that it prevents contaminant migration to the aquatic environment"--Abstract. gccst Harbours gccst Sediments gccst Pollutants Canada. Environment Canada. National Water Research Institute (Canada). Lakes Research Branch. NWRI contribution ; 93-09. (CaOODSP)9.844121 PDF 1.54 MB https://publications.gc.ca/collections/collection_2019/eccc/en13-5/En13-5-93-09-eng.pdf