A Treatability Test for Evaluating the Potential Applicability of the Reductive Anaerobic Biological In Situ Treatment Technology (RABITT) to Remediate Chloroethenes

Abstract : This draft, unvalidated protocol describes a comprehensive approach for conducting a phased treatability test to determine the potential for employing the Reductive Anaerobic Biological In Situ Treatment Technology (RABITT) at any specific site. The treatability test is presented in a phased approach, allowing the user to screen out RABITT in the early stages of the process to save time and cost. The first phase relies on a review of existing site data, which include any data generated during previous site investigations. The second phase requires that a candidate test plot location within the plume be selected for more detailed characterization. The decision to proceed to the third phase of the treatability study is based on the evaluation of the data collected during the characterization of the candidate test plot. The third phase of the treatability study involves conducting laboratory microcosm studies. The fourth phase entails field testing of the electron donor/nutrient formulation determined in the laboratory microcosm studies to be the most effective for supporting biologically mediated reductive dechlorination. The data from the phased treatability test described in this protocol indicate the potential for the microbiological component of RABITT and are used to make the decision to proceed to pilot-scale testing or full-scale implementation of RABITT. This unvalidated protocol was developed by a team of government, industry, and academic scientists and engineers and will be demonstrated at five DoD field sites over the next two years. The protocol will be applied during 1998 and 1999 at five field demonstration sites representing the Air Force, Army, and Navy. Selection of sites in several EPA Regions plus interactions with the Interstate Technology Regulatory Cooperation (ITRC) Work Group will facilitate improved regulatory acceptance of this innovative technology.

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