Case Study A1: Steam Enhanced DPVE (Dual Pump) at a Former Chemical Works (Manchester) - Chlorinated Solvents
Remediation Value: £450,000
Project: Treatment of Chlorobenzene and BTEX impacted soil and groundwater. Treatment area 730 m2 to depth of 9 mbgl. Remediation techniques used included Steam Enhanced Remediation (SER), Groundwater pumping, Vertical and Horizontal Soil Vacuum Extraction (SVE) and Air Sparge (AS). A maximum groundwater temperature of 103oC was achieved during the steam injection. On commencing polishing, subsurface soil temperatures between 50 to 65oC were recorded. Temperatures reduced only 15oC over a six-week period providing optimal conditions for biodegradation. An estimated total VOC mass removal, of 2,675 kg was delivered by the SER treatment. Mass recovery peaked at 475 kg per week during steam injection.
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