GA005 – Pneumatic Fracturing, Chemical Oxidation, Ferox™
Sodium Permanganate Application at Marine Corps Logistics Base in Albany, Georgia
In 2005, ARS completed a full-scale in situ groundwater remediation at the Marine Corps Logistics Base in Albany, Georgia. ARS was contracted to an international consulting company to apply the Ferox™ technology at one site on the base and implement sodium permanganate injection at another area of the base.
Figure 1: Site Setup-Full Size Sonic Drill Rig and ARS Mixing Trailer with Fracture Manifold; Albany, GA.
The first phase of the project was implemented in the summer of 2005 and involved the application of Ferox™ in conjunction with Pneumatic Fracturing. The Zero-Valent Iron (ZVI) remedial approach was selected to address the carbon tetrachloride contamination in the groundwater at depths greater than 120 ft. bgs. The formation was silty/sandy clay and weathered limestone. To reach the depth effectively while maintaining borehole integrity for the injection as well as minimizing cuttings, ARS integrated sonic drilling into the injection process. Custom-made subs and adapters were needed to couple ARS’ proprietary injection assembly with the sonic rig’s tooling. At the completion of this phase of the work, more than 173,000 lbs. of ZVI powder were injected through 18 boreholes.
Figure 2: Bulk Oxidant Tanker and Oxidant Dilution Area
The second phase was implemented during the fall of 2005. Pneumatic Fracturing and sodium permanganate injection were conducted to remediate TCE and its daughter products at other areas on the base with similar geology. The treatment zone extended down to 160 ft. bgs. Some of the injection took place within a highly active area where military combat vehicles were serviced. Additionally, ARS set up a large-scale mixing operation onsite to dilute 40% solution to 8% for the injection operation. At the completion of this phase, more than 135,000 gallons of 8% sodium permanganate were injected through 22 injection points.
During each of the two phases, ARS deployed two field injection/drilling crews that worked parallel to each other in order to expedite the implementation. This was the deepest ZVI injection project to be implemented. It presented technical, logistic and heath-and-safety challenges. The project was completed on-schedule and within budget.