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Comparative Demonstration of Active and Semi-Passive In Situ Bioremediation Approaches for Perchlorate-Impacted Groundwater (Longhorn Army Ammunition Plant)

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Final rept.

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Perchlorate is an inorganic anion that consists of chlorine bonded to four oxygen atoms. It is a primary ingredient in solid rocket propellant and has been used for decades by Department of Defense DoD, National Aeronautics and Space Administration NASA, and the defense industry in the manufacturing, testing, and firing of rockets and missiles. Perchlorate exhibits high solubility and mobility in water and has been identified in groundwater at numerous sites across the U.S. at concentrations above the upper limit of U.S. Environmental Protection Agencys USEPAs provisional cleanup guidance for perchlorate of 18 parts per billion ppb. Enhanced In Situ bioremediation EISB of perchlorate impacted groundwater offers the potential to treat and destroy perchlorate without the need for disposal of residuals containing recovered perchlorate as with above ground ion exchange or extensive above ground treatment as with Ex Situ bioremediation. This Report describes work conducted to demonstratevalidate the use of a semi-passive EISB approach at the Longhorn Army Ammunition Plant LHAAP in Texas. The goal of this work was to demonstrate the efficacy of this approach at a scale that is large enough to generate accurate full-scale design and cost information for widespread technology consideration and application at DoD and related sites.

Subject Categories:

  • Organic Chemistry
  • Logistics, Military Facilities and Supplies
  • Solid Wastes and Pollution and Control
  • Water Pollution and Control
  • Ammunition and Explosives
  • Ecology

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