Enhanced bioremediation

Geo2 were asked to mobilise rapidly and remediate the impact to save the site for redevelopment, while ensuring no liability for future landlords. We proposed a series of direct push injections of Hydrogen Release Compound (HRC), that would speed up the biological degradation of chlorinated hydrocarbons.

This process enabled the pressurised application of chemicals at depth, allowing the team to apply the treatment media at different levels throughout the water column.

The rapid application suited a tight development timescale, working around and during the construction activity that was underway. Owing to the longevity of HRC, our job aftercare involved monitoring the land every month to ensure its full efficacy following the culmination of the project.

More than 95% of dissolved phase TCE contamination was remediated within a year, and breakdown of daughter products (dichloroethylene and vinyl Chloride), created as a result of TCE degradation, was achieved over a longer period, demonstrating the ongoing activity of the HRC.

By using specially adapted direct push drilling rigs, we ensured contaminants were accurately targeted, and maximum treatment was achieved from each injection. The method chosen also meant no permanent infrastructure was needed, so it didn’t disrupt ongoing building work at the site.
The work was completed with minimal disruption and no delay to the build programme at the site.