Board of Directors

Lisa Reyenga, P.E.
Lisa has served as the ANSR editor since 2020 and was named the Board Chair in 2023. Lisa is a NAPL Technical Director and Senior Engineer with GEI Consultants, Inc. in Denver, CO. She specializes in site characterization, conceptual model development, and developing strategies to advance remediation sites to closure. She has a particular interest in NAPL science to understand NAPL distribution, mobility, recoverability, and degradation and inform risk-based evaluations. She is experienced in assessment and remediation of LNAPLs and DNAPLs in both upland and sediment environments. Lisa is committed to using the best available science to let data drive site decision making. She sees ANSR as a valuable tool in communicating that science to as many industry practitioners as possible in a way that is both accurate and approachable.

J. Michael Hawthorne, P.G.
ANSR founder and current board member, former ANSR editor and Board Chairman, SVP and Principal with GEI Consultants, Inc., spent much of 2010 thinking about an online NAPL journal and collaborating with friends and colleagues, in particular Andrew Kirkman. Ultimately, Mike decided that he wanted an electronic journal that was delivered freely all over the world, which focused on leading edge practical NAPL tools and concepts, was short and highly graphical in nature, and was written in plain English to maximize understanding and usefulness. In January of 2011, he wrote and published the first issue of Applied NAPL Science Review (ANSR). Over the next several months the ANSR Review Board came together with an exceptional and diverse group of NAPL experts from regulatory agencies, industry, academia, and consulting. Since that time ANSR has grown with readers from all 50 United States and from countries around the globe.

Andrew J. Kirkman, P.E.
Andrew is a Senior Scientist and Subject Matter Expert in hydrogeology and LNAPL mechanics at BP Corporation North America in Chicago, IL. He specializes in providing improved site conceptual models and strategies for remediation sites. He is knowledgeable in hydrogeology, multiphase fluid flow, fluid mechanics, subsurface environmental investigations, and remediation of petroleum products. Andrew fosters continued learning of LNAPL science through journal article submissions, advocacy, and conference presentations and workshops. Andrew and Mike Hawthorne collaborated on the initial development of a LNAPL Science Review publication as they recognized the need to distribute recent journal articles and spread the understanding and methodology to the broader industry.

Robert J. Frank, R.G.
Robert is a Principal Hydrogeologist at Jacobs in Tempe, AZ. Robert is a registered geologist in Arizona with over 25 years of experience. He has expertise in the fate and transport of organic and multiphase component contaminants in both the saturated and unsaturated zone, with an emphasis on NAPL distribution, mobility, and recoverability. In 2014, he became a part of the technical review team to help bring the ANSR articles to the public.

Paul Cho
Paul works at the California Regional Water Quality Control Board in Los Angeles and has regulatory experience in solid waste disposal facilities construction, closure and environmental programs, and environmental enforcement for oil refineries and terminals. In 2013, Paul became a member of the ANSR Scientific Review Board while working with other LNAPL specialists related to LNAPL transmissivity as a metric for tracking LNAPL recovery progress.

Randy St. Germain
Randy is President of Dakota Technologies, Inc, in Fargo, North Dakota. He and his colleagues at Dakota have developed a continually improving series of direct push deployable site characterization systems for high-definition delineation of petroleum, coal tar, and creosote NAPL in the subsurface. From research field trials in 1992 at Tinker AFB, subsequent commercialization of the ROST, UVOST, TarGOST and the Dye-LIF system for chlorinated DNAPL, Randy has spent the last 25 years “chasing NAPL” with LIF. He got involved with ANSR in 2011 when Mike Hawthorne invited him to write a laser-induced fluorescence primer, and was invited to become a board member in 2014.

Dr. Terrence Johnson
Terrence works at US EPA office of Solid Waste and Emergency Response/ Technology Innovation and Field Services Division/ Environmental Response Team in Las Vegas, NV. Terrence is experienced in groundwater and multiphase flow, and contaminant transport modeling, and the fate, interactions, assessment and clean-up of LNAPLs and DNAPLs and their dissolved plumes in soils and groundwater. His specialties include emergency response, groundwater flow and contaminant transport modeling, and interactions of LNAPL and DNAPLs in the subsurface.

Brent Stafford
Brent is an Environmental Engineer and Hydrogeologist for Shell Oil Co. Brent’s roles with Shell include: Technical Lead for emerging contaminants risk management-Americas, Technical Lead for soil and groundwater risk assessment of fuel products, Technical advisor on CERCLA sites, and Soil and Groundwater R&D Program Lead. To ANSR, Brent brings research and oil and gas industry experience with NAPL source zone generation, NAPL dissolution, and sheen and ebullition management.

Douglas Blue, Ph.D. (Retired)

Doug is a retired technical advisor from Imperial Oil Environmental & Property Solutions. In his final role, he was seconded to ExxonMobil Environmental & Property Solutions, where he provided technical support for CERCLA and other multiparty sites in the United States. Most of his NAPL work has been related to the mobility and migration of NAPL in sediments.  This has included participation in collaborative laboratory and field research programs investigating NAPL movement in sediments that were emplaced as oil-particle aggregates. In addition, he has been active in developing several ASTM standards covering topics of interest for NAPL mobility and migration in sediments.

Kyle Waldron
Kyle is a Remediation Professional for Marathon Petroleum Company located in Auburn, WA.  He focuses on applying sustainable remediation practices by considering the effects of remedial actions through assessing environmental, economic, and social metrics. He has been an advocate for incorporating sustainability best practices into remediation projects.

Danny D. Reible
Danny Reible is the Donovan Maddox Distinguished Engineering Chair and Paul Whitfield Horn Professor at Texas Tech University where he guides the development of the Maddox Environmental Engineering Research Center. He holds a PhD in Chemical Engineering from Caltech and in 2005 was elected to the National Academy of Engineering for “the development of widely used means of managing contaminated sediments”.  His current research is focused on sustainable management of water resources, technologies and practices for the use and reuse of brackish and produced waters, and the assessment and remediation of contaminated soils and sediments.

Reeti Doshi
Reeti is a Program Manager at National Grid in New York, NY. Reeti has over 15 years of experience in Environmental Engineering in New York with focus on industrial, MGP, and superfund sites. She holds a master’s degree in Environmental Engineering as well as in Quantitative Methods and Modeling. She has published article on “Subsurface Solutions” in ASCE magazine as well as a paper on “Nano Aluminum – Transport and Environmental Effects” in Elsevier Environmental Research Journal, which has been cited 235 times. She has expertise in the delineation, fate and transport, and remediation of NAPL sites with an emphasis on the DNAPL distribution, mobility, containment, and removal.

Mahsa Shayan, Ph.D., P.E.
Mahsa is currently the PFAS Practice Lead at CAPE Environmental Management Inc. Prior to her current role, Mahsa was a Senior Project Engineer and the Global PFAS Technical Practice Group (TPG) Lead at AECOM Technical Services. She obtained her Ph.D. in environmental engineering from the University of Waterloo under the supervision of professors Neil Thomson, Jim Barker, and Ramon Aravena. Mahsa has extensive experience in contaminated site characterization, source identification, and remediation; specializing in contaminant fate and transport studies, geochemical, hydrogeological, isotope, and molecular biology data evaluation, and remedial options analysis for sites impacted by a wide range of emerging and conventional contaminants including NAPL and PFAS.  Dr. Shayan maintains technical excellence through participation in innovative industrial/research projects, technical publications, and presenting at prestigious conferences. To ANSR, Mahsa brings years of academic and professional experience to help the oil and gas industry explore and solve issues related to NAPL and PFAS.

Chris Marks, Ph.D.
Chris is a Senior Environmental Scientist with the Arizona Department of Environmental Quality (ADEQ) serving as a subject matter expert and regulator within the Waste Programs Division on CERCLA, RCRA, and LUST projects.  Chris specializes in evaluating the fate of contaminants and associated biogeochemical and ecological responses of resident microflora within varying environmental compartments.  He received his doctorate in microbiology from the University of Oklahoma in 2016 and served as a post-doctoral researcher with the US EPA Office of Research and Development before joining ADEQ.  His professional career has also involved the application of next-generation molecular biology technologies (e.g. metagenomics, transcriptomics, metabolomics) to environmental investigations and remedial projects.  As a researcher turned regulator, Chris has a passion for promoting improved communication and collaboration between regulators and environmental professionals, as well as the development of rigorous standards for the appropriate application of emerging advanced analytical techniques to remedial investigations. 

Kammy Sra

Kammy is a Lead Environmental Engineer and Remediation Specialist in the Chevron Technical Center in Houston, TX. He specializes in using chemical amendments to enhance attenuation of contaminants in the subsurface, use of advanced diagnostic tools such as stable isotopes, fate and transport of PFAS, and data analytics and machine learning for a variety of environmental use cases. He is currently the program manager for research in Groundwater Remediation at Chevron. His current research focuses on using sulfate for enhancing attenuation of petroleum hydrocarbons in groundwater and enhancing depletion of petroleum hydrocarbon source zones. He received his Ph.D. from University of Waterloo, Canada in 2010. He has published 16 research articles in peer-reviewed journals and has presented at several prominent conferences. He brings a combination of research and industry experience particularly that which is directly relevant to the O&G industry and continues to work on established as well as emerging environmental issues.

Emeritus Board Members

Natasha Sihota, Ph.D.
Natasha is a Lead Researcher and Subject Matter Expert in site assessment and remediation at Chevron Corporation in San Ramon, CA. She supports both domestic and international remediation and leads research and development for novel site assessment technologies.

Mark Adamski, P.G.
Mark is the Lead Petroleum Systems Geologist at Statoil in Houston, Texas. Currently he models basin evolution and oil migration for oil exploration projects. While working environmental projects he specializes in hydrogeology, site characterization, contaminant transport modeling, LNAPL assessment modeling, and recovery.

Mark W. Malander (Retired)
Mark was a Project Development Technical Advisor for ExxonMobil Environmental Services Company in Houston, Texas. He was responsible for assessing, cleaning, and divesting idled properties, doing site specific soil and ground water advocacy, and developing risk management tools and strategies for the company. In his role on the ANSR board, he brought a more technical advocacy component to the review.

Dennis Helsel, Ph.D.
Dennis is a consultant and trainer on statistical methods for environmental and natural resource scientists through his firm, Practical Stats. Dennis has authored three textbooks, has been published in a variety of journals, and has conducted numerous webinars, seminars, and courses on topics within environmental statistics. As associate director of ANSR, he applies multivariable statistics techniques to LNAPL and other groundwater chemistry investigations.

Stephen Boynton, P.E., LSP
Stephen is the president of Subsurface Environmental Solutions, LLC. He is a Massachusetts Licensed Hazardous Waste Site Professional (LSP) and provides site assessment, remediation, and environmental strategy services. He specializes in LNAPL Mass, Mobility and Recoverability evaluations, and is an expert in application of ex-situ fluorescence technology for expedited LNAPL assessment. Mr. Boynton also teaches continuing education courses for LNAPL management, 2D and 3D environmental data visualization, and application of fluorescence technologies to LNAPL assessment.

Dr. Randall Charbeneau, PE, University of Texas (Retired)

Dr. Sanjay Garg, Shell Global Solutions (US) Inc.

Mark Lyverse, PG, Chevron Energy Technology Company (Retired)