00000nam 2200000za 4500 9.863962 CaOODSP 20241203113644 cr ||||||||||| 181031s1985 oncb ob f000 0 eng d 0662140818 (print) CaOODSP eng eng fre n-cn-on n-cn-qu En36-503/136E-PDF En36-503/136E Merriman, J. C. Trace organic contaminants in the Ottawa River, National Capital Region, 1980 [electronic resource] / J.C. Merriman and R.C. McCrea. Burlington, Ont. : Inland Waters Directorate, Ontario Region, Water Quality Branch, 1985. v, 7 p. : map. Technical bulletin ; no. 136 Issued also in French under title: Contaminants organiques à l'état de trace dans la rivière des Outaouais, région de la Capitale nationale, 1980. Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographical references (p. 4). "Three surveys of the Ottawa River were carried out in May, August and October 1980, in the National Capital Region, to determine ambient levels of hexachlorobenzene, organochlorine pesticides and total PCBs (polychlorinated biphenyls) in water. Quantifiable residues were most frequently found during the May survey. Methoxychlor, heptachlor epoxide, dieldrin and total PCBs showed indications of having temporal variation. Contaminants were found more frequently at stations affected by point source discharges and at sites located on tributaries of the Ottawa River. Ontario Ministry of the Environment aquatic life objectives for dieldrin and total PCBs were exceeded at least 10% of the time, suggesting that further investigation is warranted"--Abstract, p. v. Includes abstract in French. Water pollution Organochlorine compounds Ottawa River (Quebec and Ont.) Measurement McCrea, R. C. Canada. Environment Canada. Canada. Inland Waters Directorate. Ontario Region. Water Quality Branch. Contaminants organiques à l'état de trace dans la rivière des Outaouais, région de la Capitale nationale, 1980 (CaOODSP)9.863965 Technical bulletin (Canada. Inland Waters Directorate) no. 136. (CaOODSP)9.861123 PDF 675 KB https://publications.gc.ca/collections/collection_2018/eccc/en36-503/En36-503-136-eng.pdf