- As soil is heated, volatile contaminants in the soil are vaporized or destroyed by a number of mechanisms, including:
(1) evaporation into the subsurface air stream introduced by application of vacuum, (2) steam distillation into the water vapor stream, (3) boiling, (4) oxidation, and (5) pyrolysis
- Depending on the depth of treatment, an array of either thermal blankets or vacuum/heater wells are used;
- Produced vapors are treated with an air pollution control system to remove residual contaminants that have not been destroyed in situ.
- Achieves high clean-up standards
- Fast remediation – 99% removal in 3-6 months;
- Wide range of target compounds, soil and underground water can be treated at the same time;
- Applicable beneath buildings.
Applicable contaminated sites:
- Applicable for sites which cannot be excavated;
- Organic contaminated sites such as petrochemical industry, underground tank farm, lumber mills and pesticides warehouse, and etc.