Proposed Chloride Discharge Criterion for the Sable Kimberlite Pipe Development, Ekati Diamond Mine (BHP Billiton, January 2007)
This report proposes a site-specific chloride discharge criterion of 1,332 mg/L for discharges from Two Rock Sedimentation Pond related to potential Sable kimberlite pipe mining operations at EKATI Diamond Mine, based on toxicological testing establishing an aquatic threshold (HC5) of 313 mg/L and hydrodynamic modelling demonstrating a dilution factor of 4.26 in Horseshoe Lake over 21-day periods.
- Date
- Document type
- Report
- Parties
- BHP Billiton Diamonds Inc., Rescan Environmental Services Ltd., Wek'eezhi Land and Water Board, Department of Fisheries and Oceans Canada, Environment Canada, US EPA, Canadian Council of Ministers of the Environment
- Locations
- EKATI Diamond Mine, Lac de Gras, Yellowknife, Northwest Territories, Horseshoe Lake, Horseshoe Watershed, Sable Lake, Two Rock Lake, Two Rock Stream, Exeter Lake, Yamba Lake, Coppermine River, Koala Lake, Horseshoe Lake Watershed, BHP Billiton claim block
- Parameters
- chloride discharge, water quality, aquatic toxicity, species sensitivity distribution, acute toxicity, chronic toxicity, hydrodynamic modelling, dilution modelling, assimilative capacity, pH, water hardness, phytoplankton, zooplankton, benthic invertebrates, fish abundance, water licence compliance
- Pages
- 199
Original document
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