A Permeable Reactive Barrier (PRB) is an in situ permeable treatment zone designed to intercept and remediate a contaminant plume to remediate groundwater. The treatment zone may be created directly using reactive materials such as iron, or indirectly using materials designed to stimulate secondary processes (e.g., adding carbon substrate and nutrients to enhance microbial activity). Since its first implementation in the early 1990s, over 200 PRB systems have been installed to treat groundwater contaminants and PRBs have become an important component among the various technologies available to remediate groundwater contamination.
The ITRC Technical/Regulatory Guidance Permeable Reactive Barrier: Technology Update (PRB-5, 2011) and associated Internet-based training is intended to help guide state and federal regulators, consultants, project managers, and other stakeholders and technology implementers through the decision process when a PRB is being considered as a remedy, or part of a remedy, to address contaminated groundwater; and to provide updated information regarding several technical aspects of the PRB using information attained from the more than 15 years that the PRB has been a viable and accepted in situ remediation technology for contaminated groundwater. The guidance and training provides an update on PRBs to include discussions of additional types of reactive media and contaminants that can be treated, design considerations, construction/installation approaches and technologies, performance assessment, and longevity.
If you are unfamiliar with PRBs, we ask that you review background information on PRBs prior to attending the training class. Documents produced by the ITRC PRB team are available for review on the ITRC Permeable Reactive Barriers Guidance Documents page. You can access archives of previous ITRC trainings at http://www.clu-in.org/conf/itrc/advprb_032102/, http://www.clu-in.org/conf/itrc/prb_031902/, and http://www.clu-in.org/conf/itrc/prbll_061506/.