Calgary, Alberta -- A tailing pond at a Canadian oil sands facility may be leaking toxic sludge into its surroundings, environmental activists say.
The pond, located in a remote area of Alberta, contains toxic waste from the Horizon oil sands project operated by Calgary-based Canadian Natural Resources Ltd., the Canadian Broadcasting Corp. reported Monday.
The tailing pond has been in operation for about a year. It has berms on three sides but is open on the western side where CNRL says topography and clay beneath the surface are sufficient to contain tailings in that section of the pond.
Such a setup is allowed under a plan approved six years ago by Alberta's Energy Resources Conservation Board.