Toxicity of saline groundwater from Syncrude's Lease 17 to fish and benthic macroinvertebrates

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  • The mining of the tar sands which are included in the area to be developed by Syncrude Canada Ltd. will require the dewatering of the mine pits. This will involve the pumping of large volumes of saline groundwater. Present plans call for its eventual disposal through Ruth Lake, the Poplar River and, finally, the Athabasca River. This study was designed to determine whether groundwater from the mine area is toxic to aquatic organisms and, if so, the concentrations at which this toxicity is expressed. A variety of species, including both fish and aquatic insects, was tested to determine the range of sensitivity among aquatic animals. The resultant data can, with some qualifications, be used to estimate the maximum safe concentrations of groundwater which can be added to natural waters with minimal risk of toxic effects.

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    Conditions of Use McMahon, B., P. McCart, A. Peltzner and G. Walder, 1977. Toxicity of saline groundwater from Syncrude's Lease 17 to fish and benthic macroinvertebrates. Syncrude Canada Ltd., Edmonton, Alberta. Environmental Research Monograph 1977-3. 99 pp. Permission for non-commercial use, publication or presentation of excerpts or figures is granted, provided appropriate attribution (as above) is cited. Commercial reproduction, in whole or in part, is not permitted without prior written consent. The use of these materials by the end user is done without any affiliation with or endorsement by Syncrude Canada Ltd. Reliance upon the end user's use of these materials is at the sole risk of the end user.