Evaluation of Aerobic and Anaerobic Degradation of Pentachlorophenol in Groundwater (PDF)
Bench-scale laboratory tests were conducted to evaluate and compare the enhanced bioremediation of pentachlorophenol (PCP) in groundwater under anaerobic and aerobic conditions. While tests under both conditions showed a significant reduction of PCP over the 3-month test period (greater than 90 percent reduction compared to 40 percent in controls), removal to concentrations below the 10 μg/L method detection limit was only observed under aerobic conditions in the time allowed. The results of the laboratory tests were used to select an approach for a follow-up field test to evaluate application at a Navy-owned facility in Virginia Beach, Virginia that has been placed on the National Priorities List (NPL) by EPA Region III. The field test, which involved the injection of an Oxygen Release Compound® (ORC) slurry into the aquifer, was designed based on historic site data. The monitoring system was installed in August 2000 and a baseline round of data was collected. ORC was injected in October 2000. The test is scheduled to run for thirty-six weeks (July 2001).