• Challenges: The scale of the contamination presented a number of obstacles to success, including:
  • Treating such a widespread plume cost-effectively
  • Effectively remediating such a large contaminant mass – including DNAPL
  • Addressing re-equilibration of contamination from the soil and free-phase during treatment
  • Avoiding the accumulation of daughter compounds and ensuring their degradation.
• Remedial Design: Combining sulfidated micron scale zero valent iron and large-volume controlled release electron donor substrates, in designs tailored to the contaminant concentrations across the source area covering 8,000m².
• Application: 4 direct push injection rigs and a specialist injection trailer were operated concurrently to co-apply 250,000 litres of substrates into 611 injection points.
• Results: Validation results across the target area showed an 85% reduction in TCE concentrations was achieved over a 12-month period, with full degradation occurring. This exceeded the remedial goal, allowing the site redevelopment to continue as planned.

Language: English
Presenter:  Jack Shore, Regional Manager Europe, REGENESIS and Sarah Hughes, District Manager UK & Scandinavia, REGENESIS