PROVIDE SECONDARY CONTAINMENT AT EDMONTON TERMINAL
Before construction can begin, Trans Mountain must submit an updated risk assessment for potential spills, boil-overs, flash fires and vapor cloud explosions at its Edmonton Terminal West Tank Area. The company must demonstrate that its drainage system can quickly channel a significant petroleum release from any storage tank in its impoundment lot to a remote impoundment annex without overflow—all while a one-in-100-year, 24-hour weather storm is occurring. That scenario also has to include drainage for standing water generated from firefighting activities. Trans Mountain must show that its own mitigation measures will reduce risks to people and the environment to As Low As Reasonably Practicable (ALARP) and in compliance with the Major Industrial Accidents Council of Canada’s criteria for risk acceptability. Identical conditions apply to the Trans Mountain terminals at Burnaby and Sumas, British Columbia.