Accession Number : ADA600303


Title :   Enhanced Attenuation of Unsaturated Chlorinated Solvent Source Zones using Direct Hydrogen Delivery


Descriptive Note : Cost and performance rept.


Corporate Author : ENVIRONMENTAL SECURITY TECHNOLOGY CERTIFICATION PROGRAM ALEXANDRIA VA


Personal Author(s) : Newell, Chuck ; Seyedabbasi, Ahmad ; Coyle, Chuck ; Wichman, Mark ; Geibel, Nick ; Leeson, Andrea


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a600303.pdf


Report Date : Jan 2013


Pagination or Media Count : 65


Abstract : As of 2005, the Department of Defense (DoD) has identified nearly 6,000 sites at its facilities that require groundwater remediation and has invested $20 billion for site cleanup over a tenyear period (Government Accountability Office [GAO], 2005). At many of these sites, unsaturated chlorinated volatile organic compounds (CVOC) source zones located above the water table are producing and sustaining groundwater plumes. Many of these unsaturated sources are currently being treated with soil vapor extraction (SVE) technologies. Long-term SVE projects can be very costly, as the treatment process for the recovered vapors is expensive. The overall objective of this project is to show if Hydrogen-Based Treatment (H2T) can serve as a remediation technology for the unsaturated zone, either as the initial remediation technology applied at a site or as a polishing technology that will allow DoD site managers to shut down an existing expensive, low performance SVE system, but where monitored natural attenuation may not be sufficient to control the groundwater plume that is sourced by the residual contaminants in the unsaturated zone. With such a technology, the cost for remediating these groundwater plumes can be greatly reduced, and a much more sustainable remedy can be implemented. This demonstration answers key questions about the performance, implementability, and cost of the technology. If successful, the H2T system can serve as a cost-effective and more sustainable remediation technology (i.e., lower carbon-footprint) for unsaturated soils containing chlorinated solvents.


Descriptors :   *CHLORINATION , *GROUND WATER , ATTENUATION , BASE LINES , CARBON DIOXIDE , CONTAMINANTS , COST ANALYSIS , EXTRACTION , FIELD TESTS , GEOLOGY , HYDROGEN , HYDROGEOLOGY , INJECTION , NITROGEN , ORGANIC COMPOUNDS , PROPANE , SAMPLING , SOLVENTS , TRICHLOROETHANES , VAPORS


Subject Categories : Inorganic Chemistry
      Organic Chemistry
      Water Pollution and Control


Distribution Statement : APPROVED FOR PUBLIC RELEASE