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	Battelle Chlorinated Solvent Bioremediation Design Service    For In Situ Bioremediation (ISB)
Battelle Chlorinated Solvent Bioremediation Design Service Our Services Working With Battelle Northwest Battelle PNWD in a Broader Sense Official RT3D Web Page      Multi-species, multi-dimensional, reactive transport modeling.  Downloadable code. Summaries of Project Experience Research and Development Index Key Staff Publications Bioremediation Resources Contact Information

Battelle Pacific Northwest Division (Battelle Northwest) has been developing and applying in situ bioremediation of chlorinated solvents and reactive transport software for the last decade.  Key contributions include development of the RT3D numerical code and successful applications of both accelerated in situ bioremediation (ISB) and monitored natural attenuation (MNA).  Battelle Northwest has conducted numerous projects for both federal government and private clients demonstrating strong capabilities in accelerated in situ bioremediation design and natural attenuation evaluation.

• Laboratory Microcosms Battelle Northwest has extensive experience evaluating a variety of microbial metabolisms for reductive and co-metabolic dechlorination through use of laboratory microcosms studies.  Battelle Northwest structures these studies within a context of reactive transport analysis to specifically obtain the information important to design an accelerated ISB system or evaluate natural attenuation.
• Customized Reaction Modules for RT3D Battelle Northwest can efficiently develop customized reaction expressions within the RT3D reaction module framework to describe reactions at the level of detail needed for specific sites.  For instance, coupled reactions for substrate use and subsequent dechlorination can be used to describe reductive dechlorination induced by lactate amendment or methanotrophic co-metabolic dechlorination.  Standard first-order representation of dechlorination for evaluation of natural attenuation can be improved to include non-sequential dechlorination pathways, inhibition terms, and electron acceptor dependencies for the reactions.  Customized reaction modules provide a technical basis for reactive transport simulations that supports better designs for accelerated ISB and better defensibility with regulatory authorities for evaluations of MNA.  Battelle Northwest has a variety of technical resources and can develop custom reaction modules for RT3D for applications other than chlorinated solvent bioremediation.  For instance, descriptions of biological or chemical (e.g., oxidation) reactions for other organic contaminants or inorganic contaminants can be included in custom reaction modules.
• Customizations of RT3D In some cases, modifying the RT3D code may help in conducting simulations for your site.  For example, in one recent project, Battelle Northwest modified RT3D to accommodate cyclic flow conditions induced by seasonal variations in river stage at one of the boundaries for the simulation.  Instead of entering boundary conditions for 120 time points to describe this variation over the 30-year simulation, only 4 time points were input.  Additional features can also be added to RT3D.  An example is the ability to calculate injection well concentrations during recirculation between an extraction and injection well pair.
• Accelerated ISB Design Battelle Northwest has significant experience in designing accelerated in situ bioremediation systems.  Battelle Northwest personnel have performed all system design aspects, including well network design, nutrient amendment strategy, equipment specification, and system installation and operation.
• Natural Attenuation Evaluation Battelle Northwest provides technical support for evaluation of natural attenuation and development of long-term monitoring plans associated with implementation of MNA.  For sites requiring significant fate and transport analysis, Battelle Northwest can provide technical support for RT3D-based modelling.  Battelle Northwest also has significant resources for addressing site-specific technical issues such as including the evaluation of DNAPL source areas (e.g., multi-phase transport assessment and estimates of source flux) with the evaluation of MNA for the dispersed plume.  MNA evaluations require a thorough description of relevant attenuation mechanisms and development of lines of evidence for how these attenuation mechanisms are occurring at the site.  Battelle Northwest can provide the technical information needed for these descriptions and serves as a respected technical expert when communicating these lines of evidence to regulatory authorities.
• Remediation Alternative Evaluation Battelle Northwest can efficiently evaluate the viability of accelerated ISB or natural attenuation options through application of RT3D-based reactive transport assessment.  Battelle Northwest has performed this type of remediation alternative evaluation for sites at Hanford, Point Mugu, and INEEL.  Battelle Northwest has ready access to experts on non-bioremediation technologies as well if the client is interested in a broader assessment of potential remediation alternatives.

Broad Spectrum of Applied and Fundamental Environmental Research at Battelle PNWD

Battelle Memorial Institute's Pacific Northwest Division (PNWD), which operates the Pacific Northwest National Laboratory for the U.S. Department of Energy, is at the forefront of innovative environmental technology.  In addition to bioremediation, scientists and engineers at Battelle PNWD perform research and development (both fundamental and applied) on a wide variety of technologies and environmental problems.  Examples include:

• Understanding and predicting the fate of non-aqueous phase liquids (NAPL) in the subsurface
• Enhancements to Six-Phase Soil Heating for in situ remediation of organic contaminants
• In Situ Redox Manipulation for creating an in situ permeable reactive barrier for destruction or immobilization of groundwater contaminants
• In Situ Gaseous Reduction of contaminants
• Ecological and human risk assessment and risk assessment software (e.g., MEPAS, Frames)
• Marine ecotoxicology and marine ecology research

Visit the following web pages for more information on environmental research and development at Battelle PNWD.  Specific information on remediation can be found through the Natural Resources web site.  The Environmental Technology Division and PNNL web sites provide a broader picture of the work performed by Battelle Northwest at the Pacific Northwest National Laboratory.

Natural Resources Division	http://environment.pnl.gov/organization/natrediv.asp
Environmental Technology Division	http://environment.pnl.gov
Pacific Northwest National Laboratory	http://www.pnl.gov/

Photo and cross section of pilot-scale test site showing groundwater flow between injection and extraction wells (yellow arrows) and the bioactive zone (blue-gray zone).

Nutrient injection tanks, pumps, and related equipment in the Process Trailer.

 

For more information, contact:
Michael Truex Program Manager Field Hydrology and Chemistry Group	Battelle 902 Battelle Blvd., K6-96 Richland, WA 99352 USA	509-376-5461 509-372-1704 FAX mj.truex@pnl.gov