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In 2020, ITRC recognized that In situ remediation technologies using amendment injections have advanced to mainstream acceptance and offer a competitive advantage over many forms of ex situ treatment of soil and groundwater. Developing a detailed site-specific strategy is absolutely critical to the success of such in situ remedies. These strategies include conducting a thorough site characterization that will allow development of a detailed Conceptual Site Model (CSM) to guide critical analysis of subsurface features and improving remediation effectiveness. In the interest of developing expedited solutions, many past in situ remediation projects have been executed based on an incomplete understanding of the hydrogeology, geology, and contaminant distribution and mass. Some of these sites have undergone multiple rounds of in situ injections but have not advanced to closure. Better strategies and minimum design standards are required to decrease uncertainty and improve remedy effectiveness. In an effort to overcome these challenges and improve the effectiveness of in situ remediation using injected amendments, ITRC developed the guidance: Optimizing Injection Strategies and In Situ Remediation Performance (OIS-ISRP-1). The guidance and this associated training course identify challenges that may impede or limit remedy effectiveness and discuss the potential optimization strategies, and specific actions that can be pursued, to improve the performance of in situ remediation by:Refining and evaluating remedial design site characterization data;Selecting the correct amendment;Choosing delivery methods for site-specific conditions;Creating design specifications;Conducting performance evaluations, andOptimizing underperforming in situ remedies.
The target audience for this guidance and training course is: environmental consultants, responsible parties, federal and state regulators, as well as community and tribal stakeholders. This training will support users in efficiently and confidently applying the guidance at their remediation sites. An optimization case study is shared to illustrate the use of the associated guidance document. Prior to attending the training class, participants are encouraged to view the associated ITRC guidance, Optimizing Injection Strategies and In Situ Remediation Performance (OIS-ISRP-1) as well as to be familiar with the characterization process described in Integrated DNAPL Site Strategy (ITRC 2011c).
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Dave Becker, U.S. Army Corps of Engineers (dave.j.becker@usace.army.mil) Dave Becker is a geologist with the US Army Corps of Engineers Environmental and Munitions Center of Expertise since 1991. He has been an Adjunct Professor of Geology at the University of Nebraska Omaha since 2000. He has a BS in Interdisciplinary Studies (Geology) from University of Nebraska Omaha and a MS in Geophysics from Southern Methodist University. Dave has a total of 35 years of experience in the environmental restoration field with USACE. His focus areas include in-situ remediation technologies and remedy optimization. He is the primary architect of the Corps' Remediation System Evaluation optimization process. He has participated in well over 60 optimization studies for the Army, Air Force, EPA, DOE, and even one for NASA over the past 20 years.
Richard Desrosiers, GZA GeoEnvironmental, Inc. (richard.desrosiers@gza.com) Richard Desrosiers is Vice President/Hydrogeologist for GZA GeoEnvironmental, Inc. in Glastonbury, Connecticut. Beginning his environmental career in the mid-1980s, Richard has focused on large complex geologic, hydrogeologic and geochemistry fate & transport problems associated with soil and groundwater contamination. He designed and led site investigations and remediation actions at a site with chlorinated solvents and hexavalent chromium encompassing a one square mile using high resolution site characterization and designing in-situ remediation remedies using chemical oxidation for VOC and biochemical reduction to treat hexavalent chromium and volatile organic compounds. Richard has completed RCRA/CERCLA hazardous waste investigations/closures; implemented in-situ innovative recirculation well technology to capture, treat and reinject remediate groundwater within the same well; identified and developed high yielding groundwater supplies in surficial and bedrock aquifers; completed numerous hydrogeologic evaluations and groundwater models; and has provided depositions, bench and jury expert testimony regarding litigation issues. Most recently, Richard leads GZA's PFAS initiative and has participated on CT PFAS Task Force Committees. Since 2015, Richard has been an active member on the Interstate Technology & Regulatory Council (ITRC) "Characterization and Remediation in Fractured Rock", "Optimization of In-Situ Remediation and Injection Strategies" and "Per- and Polyfluoroalkyl Substances (PFAS)" teams. Richard earned a bachelor's degree in Geology from Northeastern University in Boston, Massachusetts in 1982. He is a Licensed Environmental Professional in Connecticut and a licensed Professional Geologist in New Hampshire and Tennessee.
Kristopher McCandless, Virginia Department of Environmental Quality (kristopher.mccandless@deq.virginia.gov) Kristopher (Kris) McCandless has worked for the Virginia Department of Environmental Quality (DEQ) in Woodbridge, Virginia since 2015. As an Environmental Geologist in the petroleum storage tank remediation division, he manages the characterization and remediation of numerous leaking petroleum storage tank sites, as well as assists the Land Protection Program with chlorinated solvent sites. Kris has spent most of his career as a project manager and hydrogeologist in the environmental consulting field. In the past two decades, his projects were focused on investigating and managing petroleum and chlorinated solvent sites in the Mid-Atlantic Piedmont states. Kris spearheaded investigations for Alternate Water Supplies for the DEQ Petroleum Program for State Lead sites as a contractor for DEQ, including locating new supply well locations, tracking groundwater flow through fractured media, performing packer testing to sample and isolate impacted zones within a supply well, performing pump tests in fractured rock, and assessing bedrock sites for remediation of chlorinated solvents. While reaping the benefits of many ITRC webinars during his consulting career, Kris joined the Fractured Bedrock team soon after employment with DEQ. Kris is actively engaged as a chapter lead for the ITRC Optimization of In situ Remediation team beginning in 2018. Kris earned his Bachelor of Science degree in Geology from George Mason University in 1988 in Fairfax, Virginia and is a Certified Professional Geologist (CPG) in Virginia.
Suzanne O'Hara, Geosyntec Consultants (sohara@Geosyntec.com) Suzanne O'Hara is a senior contaminant hydrogeologist with Geosyntec Consultants based in Ontario Canada. She has over 20 years of field and project management experience focusing on remediation of groundwater and soil containing recalcitrant compounds using innovative and more conventional technologies. She has directed, managed, or provided technical support for multiple projects ranging from overall strategy development, site investigation, remedial design, costing and implementation, contaminant fate and transport, and conceptual site model (CSM) development. Her technical experience involves dense non-aqueous phase (DNAPL) fate and transport in fractured media and the design, implementation and interpretation of innovative in situ remediation technologies for complex contaminated sites. Suzanne's remediation technology experience includes enhanced in situ bioremediation (EISB), in situ chemical oxidization (ISCO) and reduction (ISCR), Self-sustaining Treatment for Active Remediation (STAR) thermal remediation, passive treatment using zero-valent iron barriers, and reductive dechlorination using emulsified zerovalent iron (EZVI) for DNAPLs. Suzanne has been involved in ITRC since 2017 as a team member of the Optimizing Injection Strategies and In Situ Remediation Performance team. Suzanne earned a bachelor's degree in Earth Science (geology) from the University of Waterloo, Ontario, in 1994 and a master's in Hydrogeology from the University of Waterloo, Ontario, in 1997. Suzanne is a Professional Geoscientist in Ontario and a Professional Geologist in New York. 2ff7e9595c
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