Edmonton·New An Imperial Oil pipeline spilled 843,000 litres of bitumen emulsion northwest of Cold Lake, Alta., last week. In a statement, Imperial Oil apologized for the spill, which has been stopped and contained. Company apologized for incident in written statement to CBC News Listen to this article Estimated 3 minutes The audio version of this article is generated by AI-based technology. Mispronunciations can occur. We are working with our partners to continually review and improve the results.