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Demonstration of ISCO Treatment of a DNAPL Source Zone at Launch Complex 34 in Cape Canaveral Air Station, FL
Citation:
BATTELLE. Demonstration of ISCO Treatment of a DNAPL Source Zone at Launch Complex 34 in Cape Canaveral Air Station, FL. U.S. Environmental Protection Agency, Washington, DC, EPA/540/R-08/001, 2008.
Impact/Purpose:
The Interagency DNAPL Consortium (IDC) was formally established in 1999 by the U.S. Department of Energy, U.S. Environmental Protection Agency, Department of Defense, and National Aeronautics and Space Administration as a vehicle for marshalling the resources required to test innovative technologies that promise technical and economic advantages in DNAPL remediation.
Description:
The Interagency DNAPL Consortium (IDC) was formally established in 1999 by the U.S. Department of Energy (DOE), U.S. Environmental Protection Agency (U.S. EPA), Department of Defense (DoD), and National Aeronautics and Space Administration as a vehicle for marshalling the resources required to test innovative technologies that promise technical and economic advantages in DNAPL remediation. The IDC selected NASA Launch Complex 34 site for demonstrating five DNAPL remediation technologies. IT Corporation was the vendor selected for implementing ISCO (using potassium permanganate) at Launch Complex 34, one of the five technologies. The following conclusions were drawn from the ISCO demonstration: 1. At least half (49% to 84%) of the initial total TCE mass and possibly 76% of the DNAPL mass in the source zone were removed by ISCO. 2. Much of this removal can be attributed to destruction of TCE by oxidation, as indicated by the chloride build-up in the plot. The sharp increase in carbon dioxide and, consequently, alkalinity levels in the groundwater, is another sign of considerable oxidation of TCE and natural organic matter occurring in the aquifer. 3.Dissolved TCE levels declined considerably in most parts of the test plot in the short term, immediately following the demonstration. The federal drinking water standard for TCE (5 µg/L) was met in several monitoring wells during postdemonstration monitoring. 4. It is possible to achieve a relatively good distribution of permanganate oxidant in sandy soils. Distribution of oxidant is more difficult in finer-grained soils. A radius of influence of 10 to 12 ft around the injection point was achieved at several locations. However, at some locations, resistance to oxidant flow was considerable, and the radius of influence was much smaller.