TETCO is a San Antonio-based company, owned and operated by the Tom E. Turner family for more than 60 years. Food service fra ... nchises, construction and equipment sales, fuel system sales and service, petrochemical distribution, and environmental engineering are the company’s primary revenue sources, with significant interests in oil and gas exploration, real-estate development, paving, and utility construction. TETCO operates in Texas, New Mexico, Oklahoma and Utah. read more