00000nam 2200000zi 4500 9.881459 CaOODSP 20241203113653 m o d f cr bn||||||||| 191031s1992 bccb ob f000 0 eng d CaOODSP eng rda CaOODSP eng eng fre n-cn-bc x9x9 En40-241/92-13E-PDF Godin, Benoit, author. Cominco sediment bioassays, sediment and water chemistry, October and November 1991 / by Benoit Godin and Michael Hagen. North Vancouver, B.C. : Environment Canada, Conservation and Protection, Environmental Protection, Pacific and Yukon Region, 1992. 1 online resource (iv, 14 pages, 6 unnumbered pages) : maps. text txt rdacontent computer c rdamedia online resource cr rdacarrier Regional data report ; DR 92-13 "May 1992." Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographical references (page 13). "Slag was collected from the Cominco Lead Smelter in Trail, B.C. and tested for toxicity using standard Daphnia magna sediment bioassays. Following the results of the test, sediments were collected from Columbia River sites upstream and downstream of the Cominco discharge. The supernatant waters in the bioassays for both the Cominco slag and the downstream sediment were toxic. The acute toxicity is attributed at least partly to elevated levels of copper and zinc. The physical abrasive effect of sharp fine particles may have been a factor. No attempt was made in these tests to distinguish between physical and chemical effects"--Abstract, page i. Issued also in print format. Includes abstracts in English and French. gccst Watercourses gccst Water quality gccst Sediments Canada. Environment Canada. Canada. Environmental Protection Directorate. Pacific and Yukon Region. Regional data report (Canada. Conservation and Protection) DR 92-13. (CaOODSP)9.880720 PDF 758 KB https://publications.gc.ca/collections/collection_2019/eccc/en40-241/En40-241-92-13-eng.pdf