• Antea Group used a sorption-enhanced anaerobic bioremediation approach, marking the first application of this technology in North Carolina.
• Following the PetroFix application and subsequence monitoring period, concentrations were reduced below the risk-based cleanup objectives, leading to regulatory site closure.

At a former underground storage tank (UST) site in Wilmington, North Carolina, a history of petroleum contamination posed risks to local supply wells. Despite earlier treatment efforts spanning more than a decade – including excavation and applications of oxygen-releasing and magnesium sulfate compounds – residual benzene and naphthalene persisted in groundwater. A refined remedial strategy guided by biological data led to the successful application of PetroFix, the first such use in North Carolina. Following the PetroFix application and subsequence monitoring period, concentrations were reduced below the risk-based cleanup objectives, leading to regulatory site closure.