Marietta, Georgia: Thermal Remediation Beneath Buildings and Roads

GEO's Marietta case study describes treatment of TCE and cis-1,2-DCE in a 2,489-square-foot area extending to 50 feet below ground surface. The geology included silty clayey sand, weathered bedrock, and unweathered bedrock. Contamination beneath buildings and roads, together with underground utilities, influenced the treatment design.

Marietta treatment concept showing access beneath structures and roads, with the planned recirculation component.

Gas Thermal Remediation used angled wells to reach beneath structures and roads. Heating was integrated with multiphase extraction, soil vapor extraction, and aboveground vapor treatment. The source lists a target temperature of approximately 100°C and a 134-day heating period.

The case study reports greater than 99% contaminant mass removal and achievement of remediation goals.

The document also describes a planned heat-enhanced anaerobic bioremediation and recirculation component. That planned component should be distinguished from the thermal results already reported; this summary does not claim a separately verified biological-treatment outcome.