00000nam 2200000zi 4500 9.879337 CaOODSP 20221107165502 m o d f cr bn||||||||| 190916s1978 ykcb ob f000 0 eng d CaOODSP eng rda CaOODSP eng eng fre n-cn-yk x7x7 En40-240/78-14E-PDF Packman, Glen A., author. Assessment of the water quality and biological conditions in watersheds surrounding the United Keno Hill Mine, Elsa, Yukon, during the summers of 1974 and 1975 / by Environmental Protection Service, Yukon Branch. [Whitehorse, Yukon Territory] : Fisheries and Environment Canada, Environmental Protection Service, Yukon Branch, Pacific Region, 1978. 1 online resource (v, 26 pages) : maps. text txt rdacontent computer c rdamedia online resource cr rdacarrier Regional program report ; 78-14 "June 1978." Written by: G. Packman. Confer Acknowledgements. Errata inserted. Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographical references (page 25). "Surveys were conducted during the early summer of 1974 and 1975 at United Keno Hill Mines in the Yukon Territory. The parameters examined included water chemistry, trace metals, benthic species diversity, fish concentrations, and toxicity testing. The results indicated that zinc concentrations as high as 2.0 ppm were present in the waters of Flat Creek below the tailings pond decant, which was well above the Water Use Licence limit of 0.5 ppm. Copper, cadmium, and lead concentrations were found to be above the limits of the licence, intermittently. Benthic species diversity and fish density were reduced in Flat Creek below the tailings pond decant. Bioassay samples collected from the tailings pond decant were found to be toxic on 2 occasions out of 12 sampling times"--Abstract, page i. Issued also in print format. Includes abstracts in English and French. gccst Mining industry gccst Watercourses gccst Water quality gccst Aquatic animals Canada. Fisheries and Environment Canada. Canada. Environmental Protection Service. Pacific Region. Yukon Branch. Regional program report (Canada. Environmental Protection Service. Pacific Region) 78-14. (CaOODSP)9.879151 PDF 1.07 MB https://publications.gc.ca/collections/collection_2019/eccc/en40-240/En40-240-78-14-eng.pdf