Based in Scottsdale, Ariz., Superpumper has been specializing in the gasoline and convenience store business since 1967. Operating 11 facilities in Scottsdale and Phoenix, its service stations offer Shell gasoline, gift cards, diesel fuel, propane, car wash, as well as air and water supply. In addition, the firm provides phone calling cards/wireless recharge cards of Verizon, AT&T, Voicestream and Tracfone. Superpumper s service center allows customers with access to ATM machines, restrooms, beer/wine joints as well as convenience stores.