Suncor Energy Begins Scheduled Maintenance at Commerce City Refinery

Denver, Colorado — Suncor Energy reported today it will begin planned maintenance at its Commerce City refinery this coming weekend. The work is part of Suncor’s ongoing, regularly planned maintenance program designed to support safe, reliable operations.

Approximately 1,200 employees and contractors will be involved in the work, which includes maintenance on one of the refinery’s crude units and its associated processing units, as well as tie-in work for several capital projects. The work is expected to take place over a period of approximately four weeks.

Suncor will focus on completing the maintenance work in a safe manner while minimizing any impacts on our neighbours, our customers and the environment. Although this maintenance work may result in an increase in flaring, noise and traffic related to Suncor’s operations, necessary precautions have been taken to ensure these disruptions are kept to a minimum.

During this period, Suncor has made the necessary arrangements to ensure sufficient finished products are available and expects all customer supply agreements will be met.

Suncor Energy is an integrated energy company with operations in oil sands development and upgrading, conventional and offshore oil and gas production, and petroleum refining and product marketing. In the U.S., Suncor’s operations include pipeline operations that stretch between Wyoming and Denver; Colorado’s only refinery in Commerce City; product distribution terminals in Colorado; and retail assets across Colorado that are operated under the Shell and Phillips 66 brands. These businesses provide a vital link between our oil sands resource in Canada and the energy market in the United States. While working to responsibly develop petroleum resources, Suncor is also developing a growing renewable energy portfolio. Suncor’s common shares (symbol: SU) are listed on the Toronto and New York stock exchanges.