Bedrock Application of ORC Advanced Allows for Site Closure

Case study highlights:

• In situ remediation achieves 99% reduction of total TPH
• ORC Advanced rapidly established aquifer conditions suitable for enhanced aerobic biodegradation of the contaminants of concern
• Specially installed injection wells used to successfully address underlying fractured limestone bedrock

A former fuel service station site was to be redeveloped as part of a major road construction project. The groundwater was impacted with total petroleum hydrocarbons (TPH), methyl tert-butyl ether (MTBE) and benzene, toluene, ethylbenzene and xylenes (BTEX) from leaking underground storage tanks (USTs). It was determined that remediation was required at the site to eliminate the risk posed to human health and the environment, targeting elevated concentrations of TPH, MTBE and BTEX in the groundwater. Mouchel Consulting (now WSP Global) contacted REGENESIS for an in situ remediation solution. ORC Advanced® was selected to enhance the aerobic bioremediation of the petroleum hydrocarbons in groundwater. In the remediation design, REGENESIS adjusted the injection spacing and application rates for the highly contaminated source area (BH103, IIW14) and the moderately contaminated plume area to allow for optimum treatment of each zone.