BEL001 – Chemical Oxidation, Pneumatic Fracturing
Manufacturing Facility, Belgium
ARS conducted its first project in Europe at a large manufacturing facility in Belgium. The work performed by ARS included Pneumatic Fracturing (PF) of the soils in combination with the Atomized Liquid Injection (ALI) of 350 kilograms of sodium persulfate and 45 kilograms of ferrous iron from depths of approximately 1.5-8 m. Persulfate reacted with ferrous iron to produce persulfate free radicals, which are strong oxidizing agents.
- Confirm the applicability of Pneumatic Fracturing for a residential area.
- Develop a plan for a large-scale Pneumatic Fracturing and oxidation event.
- Estimate oxidation rates for a given injection area.
- Estimate optimal injection rate and dose.
- Reduce chlorinated VOCs to less than 2 ppb.
Concentrations of VOCs in the immediate injection vicinity were reduced from approximately 20,000 ppb to less than 5 ppb one month after injection. However, a leaky underground storm drain in the water table caused some difficulties. The injected reactants preferentially flowed to the storm drain and reduced the radius of influence. The client is currently reviewing engineering methods to seal the leaking drain line in the area before expanding the project to full-scale.