ETTL has been providing a broad range of engineering and consulting services to clients in Texas, Arkansas, Louisiana, Mississippi, Alabama, Oklahoma and adjoining regions since 1965. The Company has a highly experienced and qualified staff of some 65 engineers, geologists/hydrogeologists, environmental scientists, field and laboratory technicians and support personnel, offering close personal service. It not only provides comprehensive geotechnical and construction materials engineering services along with fully equipped testing laboratories – as well as state-of-the-art contract soil laboratory services – but offers a multitude of environmental services, including site assessments, as well as many engineering services to landfills. ETTL also has a full complement of field sampling equipment and instrumentation, including a large fleet of vehicles for subsurface exploration. In addition to home offices and laboratories in Tyler, Texas, ETTL also maintains materials testing laboratories in Longview, Texas, and Texarkana, Arkansas.