Land owned by AAV, a large German company operating in the small town of Bornheim, North Rhine-Westphalia, Germany, was formerly used as a dry-cleaning factory. Old industrial use of the land resulted in highly toxic perchlorethylene contamination and presented a hazard to health and the environment.
RSK was brought in to immediately reduce the highly toxic levels. Research found the source, weighing 1000 kg, buried up to 20 m underground. Previous remediation strategies relying on pump-and-treat and soil venting proved ineffective, so RSK opted for an innovative treatment that used zero-valent iron nanoparticles. The nanoparticles form a reactive barrier purifying contaminates in groundwater and leaves only decontaminated water and dissolved iron.
Working with speed and efficiency, the engineers installed ten injection valves delivering more than 3000 kg of zero-valent iron nanoparticles. RSK’s bespoke solution resulted in a 93% reduction of contamination within 24 months.