Natural Attenuation

For more information on Natural Attenuation, please contact:

Kathleen Yager
Technology Integration and Information Branch
(617) 918-8362
yager.kathleen@epa.gov

Overview Guidance Application Training Additional Resources

Additional Resources

Bioremediation of Chlorinated Solvents Consortium

The Consortium is one of seven Action Teams of the Remediation Technologies Development Forum (RTDF). It was established in May 1993, when representatives from various companies, universities, EPA, DoD, and DOE met to discuss their mutual interest in developing in situ bioremediation technologies to degrade chlorinated solvents in soils and ground water. The historical information concerning the consortium is available through the RTDF home page.

In 2004, the RTDF - Bioremediation Consortium initiated Phase III of its research activities when it joined forces with a multinational team to launch the In Situ Source Area Bioremediation project (SABRE). This project, which is being conducted in the United Kingdom, is scheduled to be completed in 2008 and has a budget of nearly $6 million, financed by industrial members and the DTI LINK Bioremediation program in the UK. The goal is to demonstrate the efficacy of accelerated anaerobic bioremediation as a treatment alternative for source areas contaminated with chlorinated solvent dense non-aqueous phase liquids (DNAPLs). The SABRE project team comprises: Archon Environmental; British Geological Survey (BGS); Celanese Acetate; Chevron; CL:AIRE; DuPont; ESI; GE; Geosyntec Consultants, Inc.; Golder Associates; Honeywell; ICI; Scientifics; SERDP; Shell; SiREM; Terra Systems, Inc; University of Edinburgh; and University of Sheffield. The Environment Agency (EA) of England and Wales and US EPA are also included. In addition, the University of Birmingham and BGS are conducting a complimentary research project (Streamtube) in the SABRE test cell. The project has completed initial characterization of DNAPL source zones, a laboratory microcosm study, installation of the test cell, and baseline data collection. Column studies are well advanced, and modelling is occurring throughout the project. Biostimulation and bioaugmentation of the test cell occurred in the Spring of 2007.

CORONA: Confidence in Forecasting of Natural Attenuation as a Risk-Based Groundwater Remediation Strategy
Lerner, D.N., P. Bjerg, J. Datel, A. Gargini, P. Gratwohl, C. Holliger, P. Morgan, T. Ptak, R. Schotting, H. Slenders, and S.F. Thornton. Final report of the EU research project EVK1-2001-00087. University of Sheffield, UK. 32 pp, 2005

The CORONA project hypothesizes that a common pattern of biodegradation activity can be found in most ground-water contaminant plumes. High-resolution field data were used to develop three mathematical models for estimating the length of pollution plumes. The models were built into an easy-to-use spreadsheet called CoronaScreen, which is accompanied by manuals for the software and a guidance document to explain how natural attenuation can be assessed in the field and quantified. These engineering tools were tested by practitioners outside the project before being made available for free download from the project website.

Dissolved Hydrogen Analyzer: Cost and Performance Report
C. Lebron, et al.
NTIS: ADA451214, 40 pp, 2006

This report describes the demonstration at three DoD sites of a portable dissolved hydrogen analyzer, a novel analytical technology developed by Camp Dresser & McKee, Inc., to help determine natural attenuation potential.

Interstate Technology and Regulatory Council (ITRC)

Monitored Natural Attenuation Toolbox (MNAtoolbox)

MNAtoolbox identifies primary attenuation pathways and points out processes that might mitigate against MNA for particular contaminants. Sandia National Laboratory has made the toolbox and a user's guide available on its web site.

Sandia Natural Attenuation Project

The Sandia Natural Attenuation Project is a three year program by Sandia National Laboratories to identify the mechanistic controls on metal and organic attenuation by irreversible sorption in the subsurface. SNAP will provide a scientific basis for risk-based corrective actions by helping identify only those sites where contaminants can be expected to impact the biosphere and where Monitored Natural Attenuation (MNA) is likely to be most effective.

Technology Innovation News Survey
2004

The Technology Innovation News Survey contains market/commercialization information; reports on demonstrations, feasibility studies and research; and other news relevant to the hazardous waste community interested in technology development. This report is updated every two weeks.

Treatment Technologies for Site Cleanup: Annual Status Report (ASR), Twelfth Edition
EPA 542-R-07-012, 2007

The Twelfth Edition of this report, published by the EPA Office of Superfund Remediation and Technology Innovation (OSRTI) in September 2007, documents treatment technology applications at more than 1,900 soil and groundwater cleanup projects at National Priorities List (NPL) sites. The status of more than 1,200 projects included in the ASR Eleventh Edition is updated, and information about 192 new projects derived from Records of Decision (ROD) signed from 2002 through 2005 is added. The report also includes a special section about on-site containment remedies. The ASR is based on the analysis of nearly 3,000 RODs signed since 1982 at 1,536 NPL sites. The online version includes new downloadable spreadsheets with the data for several of the key tables and figures in the report. Specific information about each technology application included in the ASR Twelfth Edition is available in the ASR Remediation Database.

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Last updated on Tuesday, June 17, 2008