Since 2010, Cameron-Cole has provided consulting services to an aerospace/defense contractor to assess and remediate at a contaminated site, which had been acquired through the acquisition of entities originally responsible for the contamination. Operating under an Administrative Order with the state regulatory agency, the previous owners of the property had designed and installed a Pump-and-Treat (P&T) groundwater remediation system to clean up a plume of chlorinated solvents consisting primarily of Trichloroethene (TCE). The P&T system was installed in the early 1990s and was operated for nearly two decades with little observed reduction in contaminant mass. Cameron-Cole was retained to evaluate the system’s effectiveness. Cameron-Cole recommended discontinuing the P&T system and performed supplemental assessment activities to better define the extent of subsurface impacts. Cameron-Cole conducted extensive assessment activities which included the use of Membrane Interface Probe (MIP) sampling and geospatial mapping software to develop a 3- dimensional figure of the plume including areas with identified Non-Aqueous Phase Liquid (NAPL). Results of the additional assessment revealed the plume had migrated off-site and commingled with other solvent plumes emanating from multiple off-site sources. Cameron-Cole worked closely with the owners, state regulatory agency, and off-site property owners to develop and evaluate several remedial alternatives. A Remedial Action Plan Modification (RAPM) specifying In Situ Chemical Oxidation (ISCO) using a proprietary continuous delivery system was prepared. Following regulatory approval of the RAPM, Cameron-Cole developed detailed construction drawings and bid specifications. Serving as the design engineer, Cameron-Cole provided project management and construction oversight for the installation of the remediation system. The system was activated in September 2014 and Cameron-Cole is providing the required operation, monitoring, maintenance, and regulatory reporting.