• PetroFix application reaches No Further Action at UST release site
• Site meets stringent North Carolina Groundwater Quality Standards (NCGWQS)
• Visual confirmation in soil cores and monitoring wells allows the field crew to make real-time adjustments to ensure proper distribution

This case study reviews a former Naval Auxiliary Air Station located in the Outer Banks region of North Carolina. After a thorough evaluation of viable remedies for petroleum contamination, the project team opted for an in-situ injection of PetroFix® Remediation Fluid to remediate the contaminants through a combination of sorption and bioremediation by adding electron acceptors. The goal for this site is to achieve closure as cost-effectively as possible. Site closure is most directly achieved by reducing contaminant concentrations below the applicable NCGWQS for four consecutive sampling events. This sorption-enhanced biostimulation approach was evaluated as the most viable, cost-effective means to reach the NCGWQS targets and achieve site closure in a reasonable timeframe.