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

Report Date:

2013-01-01

Pagination or Media Count:

65.0

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.

Subject Categories:

  • Inorganic Chemistry
  • Organic Chemistry
  • Water Pollution and Control

Distribution Statement:

APPROVED FOR PUBLIC RELEASE