The Headquarters (HQ) TCE Plume, located beneath the current Town Center near 2nd Avenue and Quebec Street, has migrated to the northwest from its source area between former Buildings 383 and 385. The source of the HQ TCE plume like was leakage from a former oil/water separator at former Building 404 to a storm sewer near the former headquarters for Lowry AFB. In the source area of the HQ TCE Plume, the highest TCE concentrations occur in groundwater within the bedrock.
KMnO4 injections were first performed in the HQ Plume source area during a treatability study in 2003. A second injection in the source area was performed in 2005. Based on the groundwater monitoring data through January 2008, TCE concentrations in the source area have been reduced by 55 percent. The TCE concentrations in downgradient alluvial wells have decreased from 27 to 96 percent.
