Guardian Fueling Technologies

Tesoro Corporation is one of the largest independent petroleum refiners and marketers in the Western United States. The company operates more than five refineries, wholesale and commercial marketing operations and a network of retail fuel stations. It has a rated crude oil capacity of nearly 560,000 barrels per day. Tesoro s retail marketing system includes more than 500 branded retail stations under the Tesoro and Mirastar brand names. The company also has 2Go convenience stores and serves motorists at Wal-Mart refueling locations. It supplies the commercial segment with heavy fuels and aviation and marine gas. Tesoro is also a major producer of distillates. The company markets wholesale motor fuels to unbranded dealers. Bruce A. Smith has been the chief executive officer of Tesoro for more than 11 years. He has been with the petroleum and natural gas company for over 13 years. Smith attended Westminster College and the University of Kansas. Tesoro Corporation was established in 1968 and is headquartered in San Antonio.

Valero Energy Corporation specializes in refining and retailing operations. The company engages in wholesale marketing, transportation activities, and product supply and distribution. Its products include reformulated gasoline, diesel fuel and oxygenates. Valero Energy Corporation also provides conventional gasoline, distillates, jet fuel, asphalt, petrochemicals and lubricants. The company maintains nearly 20 refineries in the United States, Canada and Aruba. It has more than 4,700 retail sites branded as Valero, Diamond Shamrock, Ultramar, Beacon and Total. Valero Energy s company-operated convenience stores sell snacks, candy, beer, cigarettes and coffee. William R. Klesse has been the chief executive officer of Valero Energy for more than one year. He has been with the petroleum company for over 37 years. Klesse earned a BS degree from the University of Dayton, and a MBA from Texas A&M. The company was established in 1955 and is headquartered in San Antonio.