SAFETY-KLEEN SYSTEMS

Safety-Kleen is a leading North American used oil recycling and re-refining, parts cleaning and environmental solutions company, with approximately 4,200 employees serving more than 200,000 customer locations in the United States, Canada and Puerto Rico. Safety-Kleen provides a broad set of environmentally-responsible products and services that keep North American businesses in balance with the environment. Safety-Kleen is owned by a group of investors including Highland Capital Management, L.P. of Dallas, Texas, its largest investor.