In-situ bioremediation of oil contaminated soil in Berkshire
Client: Local authority / railway infrastructure company
Contract period: 26 weeks
Following heavy rainfall, a railway oil/water interceptor overflowed, causing diesel contamination covering an area of 16,500m2, on an adjacent public recreation ground. The result was significant die-back of the grass, and temporary closure of the site due to elevated hydrocarbon contamination in the shallow soils. Excavation of 8,250m3 contaminated soils and off-site disposal was the Client’s preferred remediation option but considered problematic as the site was in a densely populated residential area.
Telluric Land Remediation proposed an alternative strategy of in-situ bioremediation by the novel injection of nutrients and oxygen into the shallow soils, promoting microbial degradation of the diesel contamination. The entire 16,500m2 recreation area was treated to site specific remediation targets and opened to the public after 12 weeks of treatment.
- Remediation options appraisal
- Design of treatment system
- Negotiating and obtaining all statutory licenses / consents
- In-situ bioremediation of hydrocarbon contaminated soils
- Soil sampling and process optimisation
- Environmental monitoring
- Treatment validation
The alternative remediation strategy adopted resulted in a cost saving to the Client of £900,000, along with the environmental advantages of significant reductions in heavy vehicle movements, minimal noise, dust and odour production.
A pdf version of this in-situ bioremediation case study is available here.