Georgia Environmental Protection Division (EPD), 224 pp, 2016

A vacant building and an asphalt-paved parking lot now occupy a site used from 1978-2009 for the manufacturing of air conditioning units and furnaces. Following discovery in 1988 of a release of reclaimed TCE from a tank farm area, a groundwater recovery system, still in operation, was installed in 1989-1990. During the current reporting period, in addition to operation of pump and treat and soil vapor extraction (SVE) systems, operation of the property-line Accelerated Remediation Technology (ART) recirculation well system continued with three new wells (ART-6, ART-7, and ART-8) installed in February 2016 to extend the geographic reach of the ART system and further reduce flux of VOCs off-property. The ART technology combines in situ air stripping, air sparging, SVE, and subsurface circulation and flushing. ART-1 and ART-2 were retired. The ART wells are located within the area of highest TCE concentrations detected in groundwater at the property's western boundary. The goal of the ART system is to reduce the mass flux of TCE exiting the property, allowing natural attenuation processes along the groundwater flow path to address the lesser VOC flux condition. TCE concentrations in groundwater passing through the ART well network are being reduced significantly. As of January 2016, SVE operations had removed an estimated total of 12,506 lb VOCs. To replace pump and treat, in situ biostimulation/bioaugmentation is planned for two areas of the property using emulsified vegetable oil and bioaugmentation culture introduced via injection wells and direct-push injections. https://epd.georgia.gov/sites/epd.georgia.gov/files/RheemPR5.pdf