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Soil and groundwater remediation using modified Fenton’s reagent

Client: Academic institution
Location: Oxford
Contract period: 4 months

Site investigations had identified petroleum hydrocarbon contamination, believed to be due to the historic presence of a garage and petrol station, within the grounds of this Oxford college. 

Telluric Land Remediation initially conducted a pilot trial to establish the optimum parameters to undertake a robust and aggressive full scale in-situ chemical oxidation (ISCO) application.  The remediation works needed to be completed and validated within strict deadlines to comply with the overall construction programme. 

Forty five injection wells were installed across the affected area.  Each injection point was primed with a catalyst prior to the application of hydrogen peroxide.  Due to the close proximity of existing buildings and extensive service network in the area requiring treating, the oxidant was introduced by gravity, in a carefully controlled manner ensuring the correct volume was dispensed to each well.  An additional full round of peroxide application was undertaken within a three week period to meet with programming requirements.

Throughout the works, a thorough monitoring regime was undertaken to follow the progress of  remediation and ensure site specific remedial targets were achieved, discharging the planning conditions associated with contamination issues.

 telluric bullet Our solution

  • Environment Agency liaison
  • Laboratory and field pilot trials
  • Installation of 45 chemical injection boreholes
  • Injection of modified Fenton’s reagent
  • Groundwater monitoring and sampling
  • Compilation of validation report

Our client benefited from a rapid, cost effective, solution that discharged planning conditions and allowed the college’s expansion plans to progress without delay.

A pdf version of this in-situ chemical oxidation case study is available here.