Who We Are

Mission Statement

To surpass our customers expectations safely and effectively.


  •  • Safety
  •  • Uncompromised Integrity
  •  • Operational Excellence
  •  • Customer Empathy
  •  • Professional Appearance (Personnel, Equipment and Facilities)

History of Company

Founder George Theodoridis began driving with his father in the early years and developed a 12-year single transport career. In 1989, Superior Tank Lines was formed and has experienced years with rapid double-digit growth. Tina Campbell, MBA, wife of Mr. Theodoridis subsequently acquired 51% ownership, prompting "women-owned business" certification.


For the past two decades, woman-owned firms have grown substantially around the globe. STL has initiated an aggressive growth plan while maintaining its values and financial stability. Corporate offices are located in Colton (California) with thriving terminals in Los Angeles (California), Huntington Beach (California), Montebello (California), Portland (Oregon), Tacoma (Washington) and Kent (Washington). The 100 unit fleet serves the western U.S.

Environment & Safety

Superior Tank Lines meets or exceeds all federal and state guidelines for environmentally safe operations, and works closely with local agencies. Superior Tank Lines is committed to protecting the environment, while striving to keep pace with the surging demand for all refined fuels in California, Oregon, and Washington.

Safety and customer service are everything in this business. Our driver training program, the foundation of our business, is second-to-none. Drivers attend mandatory safety meetings once a month to review new regulations, vehicle operation tips, and receive refresher training on various aspects of hazardous materials transportation. Technology has smoothed the way for expansion, improving fleet management and communication. Our trucks are equipped with Geotab GPS systems, “Drive-Cam” cameras, and MobileEye Collision Avoidance systems on every company-owned vehicle to ensure safety for all.

Financial Stability

In order to make long term investments in our future and the communities we operate within, Superior Tank Lines owns and operates multiple facilities in California, Oregon, and Washington. 

90 percent of our business comes from dedicated work with major corporations. We service the strongest brands on the West Coast: Chevron, P66, Shell, 76, and more. We’ve built strong relationships by providing, safe, personalized, flexible service. Our focus on building strategic industry alliances allows to move into new markets, and enables Superior Tank Lines to grow with key customers.

State-of-the-art fleet specifications, skilled drivers, dedication to service and a strong management team continue to give Superior Tank Lines the ability to provide customers with consistently high levels of service. It is a strategy that will bring continued success through future generations.