Pesticides, VOCs and petroleum hydrocarbons remediated with a suite of in situ technologies

Case study highlights:

• Soilfix, Ramboll and REGENESIS worked together to develop a tailored multi-phase remediation solution.
• Integrated application of remediation products: RegenOx, PersulfOx, PlumeStop and ORC Advanced.
• Validation results show a rapid and sustained reduction in the concentration of all contaminants of concern (COCs).
• Remedial targets were achieved in time for lease surrender, with all stakeholders satisfied with the works completed.

This project was Highly Commended in the Brownfield Awards 2020 in the category of ‘Best Remediation of a Smaller Site’. Located in East Anglia, this industrial site had been occupied by a timber yard, incinerator, fuel storage tanks and a saw mill. These were later demolished and the site-use changed to light commerical and a car park for a FTSE 100 Company. It was decided that the site should be prepared for redevelopment and a due diligence site investigation was carried out by Ramboll to support lease surrender. It was discovered that in a corner of the site, the soils and groundwater were impacted with a wide range of contaminants including petroleum hydrocarbons, volatile organic compounds (VOC’s) including BTEX, trimethylbenzene, pentachlorophenol and a mix of pesticides, including organochlorine pesticides (Dieldrin) and gamma-HCH (Lindane). Soilfix worked closely with Ramboll and REGENESIS to deliver a tailored multi-phase remediation solution for the site, including in situ remediation using a suite of REGENESIS’ remediation technologies. REGENESIS services team carried out the groundwater remediation works on-site which included a combination of in situ chemical oxidation, sorption and enhanced biological degradation.