Overview of Contaminated Site Assessment and Cleanup

Our project experience spans hundreds of initiatives across the environmental remediation spectrum. Our project experience spans hundreds of initiatives across the environmental remediation spectrum.

Geosyntec practitioners rank among the world's top professionals in providing site assessment and remediation services at a wide range of impacted sites using innovative technologies and solutions that consistently advance the state of the practice.

Through our use of innovative technologies and solutions, we provide our public and private sector clients with a wide array of services to address their toughest challenges.

Our contaminated site practitioners guide our clients through a specialized remediation plan, consult on regulatory strategies, and develop a comprehensive cleanup approach. We can address numerous types of media, including contaminated soils, sediments, and groundwater, and offer numerous services including:

Groundwater Assessment and Remediation

Our expertise in efficient site characterization, including sites that exhibit complex groundwater flow regimes, has distinguished our firm and practitioners as leaders in the practice. Geosyntec's practitioners are highly skilled in the assessment and remediation of a broad suite of contaminants, including metals, chlorinated organic chemicals, petroleum hydrocarbons, and emerging contaminants, and utilize award-winning, technology-based remediation strategies that are often first to field. Read more

Sediment Assessment and Remediation

We specialize in the assessment and remediation of sites where sediments have been impacted by a wide range of contaminants including metals, crude oil and refined petroleum compounds, polynuclear aromatic hydrocarbons, pesticides, and PCBs. Our conservation, remediation, and restoration experience includes sites ranging from small, intermittent flow streams to large man-made and natural lakes, as well as complex river, estuary, and harbor systems. Read more

Brownfield Redevelopment Planning and Design

Working with public and private sector clients, Geosyntec provides innovative redevelopment strategies for brownfield sites worldwide. We provide services, including site identification, investigation, remediation design, permitting, and construction management, that are necessary to redevelop environmentally impacted properties so that they appropriately meet environmental stewardship goals and regulatory compliance. We solve our clients' most difficult brownfield redevelopment challenges using innovative environmental remediation approaches as well as geotechnical engineering solutions. Read more

Specialized In Situ Treatment Technologies

The effective application of our advanced in situ techniques enables our practitioners to remediate difficult-to-treat environmental impacts to soil, groundwater, and sediments for our clients. Our expertise enables us to be adept at expediting site investigations, optimizing remediation solutions, and accelerating site closure through the application of a wide range of innovative technologies. We specialize in the application of enhanced in situ bioremediation of solvent mixtures, recalcitrant solvents, perchlorates, and other compounds in groundwater and sediments. Read more

Risk Assessment and Applied Toxicology

Geosyntec's human health and ecological risk assessment services identify the proper approaches to remediate sites impacted by a wide variety of contaminants. Our risk assessment specialists work with our remediation practitioners to develop site-specific solutions that achieve the needed levels of protection while optimizing financial commitments and operational practicalities for our clients. Our specialists also provide expert consultation and testimony on environmental exposure health issues for our legal clients. Read more

Vapor Intrusion

As one of the preeminent firms for assessment and management of subsurface vapor intrusion to indoor air, our practitioners design innovative and cost-effective solutions to address our clients' most challenging projects. We specialize in providing services that include regulatory negotiation and litigation support, soil gas sampling, indoor air quality (IAQ) monitoring, mathematical modeling, customized mitigation system design and optimization, and ventilation assessment. Read more

Data Management, Visualization, and Analysis

Today's projects involving the natural and engineered environment require the collection, verification, validation, organization, visualization, and analysis of large sets of data from diverse sources. Our professionals develop systems that analyze disparate data in a common context and transform that data into actionable information. By providing a bridge to access and understand the conditions observed and aid decision makers, regulators, interested stakeholders, and the general public, we can generate a common understanding of complex site conditions and develop the methods to address them. Read more

Advancing the State of the Practice

Geosyntec's practitioners are pioneers in site assessment and remediation. Our senior practitioners have developed and authored guidance material and courses for local, state, and national agencies and associations on remediation techniques and technologies. Working with the Interstate Technical Regulatory Council (ITRC), Geosyntec practitioners taught a training course on vapor intrusion, including mitigation options for the development of vapor-impacted brownfield sites. Geosyntec practitioners also wrote the guidance document on evaluating, optimizing, or ending post-closure care at impacted sites, including brownfield sites, and developed a patented approach for sub-slab vapor migration mitigation allowing residential, commercial, and industrial development on sites impacted by vapor intrusion.

Our specialists routinely collaborate with prominent national researchers from academia and government agencies to provide innovative and defensible strategies for sites with contaminated sediments. For example, we collaborated with the U.S. Geological Survey (USGS) to remediate chlorinated solvent-contaminated marsh sediments by applying a bioreactive mat system embedded with a dehalogenating microbial consortium, a technology that Geosyntec helped develop. This project and partnership earned our client recognition as a finalist for the Service to America Medal awarded by the Partnership for Public Service.

Through a collaborative research project with the University of Florida, Geosyntec professionals assisted in the development of the FLUCL software package for the Florida Department of Environmental Protection. This software is used to calculate exposure point concentration statistics in risk assessment and was the first of its kind to contain algorithms for censored datasets. FLUCL has received endorsements from several U.S. Environmental Protection Agency (EPA) regions and the California EPA.

Geosyntec scientists also pioneered the use of genetic molecular tools for the characterization of the microbes in environmental media and are engaged in applied research and development with top academic institutions around the world, including the University of Toronto, Cornell University, and the Georgia Institute of Technology.

Lead Consultants

  • Rula Deeb, Ph.D., BCEEM, PMP
    Rula Deeb is a Senior Principal Civil and Environmental Consultant based in California with more than 25 years of experience focused on private practice and academia addressing the cross-media fate ...
  • Michael Kavanaugh, Ph.D., P.E., BCEE
    Mike Kavanaugh is a Senior Principal Environmental Engineer based in California with more than 35 years of consulting experience focused on the areas of water quality, water treatment, and groundwa ...
  • David Adilman, P.G.
    David Adilman is a Principal Geologist based in Massachusetts focused on the characterization and remediation of soil and groundwater as well as the design and implementation of large-scale constru ...
  • Kwasi Badu-Tweneboah, Ph.D. P.E.
    Kwasi Badu-Tweneboah is a Principal Engineer based in Florida with more than 30 years of consulting and research experience focusing on the design and construction of containment systems for solid, ...
  • Andrew Barnes, P.G.
    Andrew Barnes is a Principal Hydrogeologist based in California with more than 30 years of environmental and hydrogeological consulting experience focused on complex site characterizations, feasibi ...
  • Michael Berman, P.E., CHMM
    Michael Berman is a Senior Principal Engineer based in Washington, D.C. with more than 25 years of experience focused on assessing, modeling, and quantifying the nature, extent, and cost of environ ...
  • Peter Zeeb, Ph.D., P.G., LSP
    Peter Zeeb is a Senior Principal Hydrogeologist based in Massachusetts with more than 25 years of experience focused on investigation and remediation strategy at some of the most challenging sites ...
  • Karen Berry-Spark
    Karen Berry-Spark is a Senior Principal Consultant based in Ontario with more than 30 years of professional experience focused on the characterization and remediation of sites impacted by chlorinat ...
  • Randy Brandt, P.G.
    Randy Brandt is a Senior Principal Geologist based in California with more than 30 years of management and technical experience with environmental and hazardous waste issues. He has focused on dev ...
  • Warren Brady
    Warren Brady is a Senior Principal Consultant based in Louisiana with more than 25 years of experience focused on the assessment and remediation of industrial, municipal, and federal sites contamin ...
  • David Bonnett, P.E., P.Eng.
    David Bonnett is a Principal Engineer based in Massachusetts with over 35 years of experience focused on water and natural resources engineering and waste containment facility planning and design, ...
  • J.F. Beech, Ph.D., P.E.
    Jay Beech is a Senior Consultant Engineer based in Georgia with more than 30 years of experience focused on design and construction of waste containment and subsurface barrier systems, sediment rem ...
  • Susan Hill, P.E.
    Susan Hill, P.E., a Senior Principal at Geosyntec, is an Environmental Engineer with more than 30 years of experience focused on the investigation and remediation of sediment mega sites. She has wo ...
  • Evan Cox, M.Sc.
    Evan Cox is a Senior Principal Remediation Scientist based in Ontario with more than 15 years of experience focused on managing and directing soil and groundwater remediation projects dealing with ...
  • Paul Botek, P.G.
    Paul Botek is a Senior Principal Geologist based in Maryland with more than 15 years of experience focused on the assessment and restoration of contaminated sites, provision of environmental manage ...
  • Robert Ettinger
    Robert Ettinger is a Senior Principal Environmental Scientist based in California with more than 20 years of professional experience focused on the fate and transport of contaminants in the unsatur ...
  • Neal Durant, Ph.D.

    Neal Durant is a Senior Principal Consultant based in Washington, D.C. with more than 28 years of experience investigating, remediating, and managing complex contaminated sites.

  • David Espinoza, Ph.D., P.E.
    David Espinoza is a Senior Principal Geoenvironmental Engineer based in Maryland focused on foundation design over soft soils, design of containment facilities (e.g., municipal solid waste, mining ...
  • Karen Kosiarek, P.E.
    Karen Kosiarek is a Senior Principal Remediation Engineer based in Montana with more than 22 years of experience focused on the characterization and remediation of soil and groundwater contaminatio ...
  • David Folkes, P.E.
    David Folkes is a Senior Principal Environmental Consultant based in Colorado with more than 40 years of experience in environmental and geotechnical consulting with special expertise and experienc ...
  • Douglas Larson, Ph.D., P.E., LSP, MWO
    Doug Larson is a Senior Principal Engineer based in Massachusetts with more than 30 years of experience focused on the investigation and cleanup of hazardous waste sites throughout the United State ...
  • Greg Corcoran, P.E.
    Greg Corcoran is a Senior Principal Civil Engineer based in California with more than 25 years of experience with a focus on the design, construction, and operation of engineered systems for waste ...
  • Paul Brookner, P.G.
    Paul Brookner is a Senior Principal Hydrogeologist based in Minnesota with more than 30 years of experience focused as a regulator, consultant, and environmental manager for a multinational corpora ...
  • Duane Graves, Ph.D.
    Duane Graves is a Senior Principal Scientist based in Tennessee with more than 30 years of experience focused on environmental biotechnology; environmental forensics; in situ groundwater, soil, and ...
  • Jeffrey Ahrens, P.E.
    Jeffrey Ahrens is a Principal Environmental Engineer based in North Carolina with more than 15 years of experience focused on environmental assessments; remedial system design and optimization; ass ...
  • Sam Williams, P.G., CHG
    Sam Williams is a Senior Principal Hydrogeologist based in California with more than 25 years of experience focused on the characterization and remediation of soil and groundwater contamination at ...
  • Beau Hodge, P.G.
    Beau Hodge is a Principal Geologist based in North Carolina with more than 25 years of experience focused on environmental site investigation and remediation with a focus on recalcitrant compounds ...
  • Mark Grivetti, P.G., CHG, CEG, REA
    Mark Grivetti is a Senior Principal Hydrogeologist based in California with more than 30 years of experience focused on characterization and remediation of hazardous waste sites, surface and ground ...
  • Nandra Weeks, P.E.
    Nandra Weeks is a Senior Principal Environmental Engineer based in Florida with more than 30 years of professional experience focused on the engineering and remediation issues associated with envir ...
  • Julie Konzuk, Ph.D., PEng
    Dr. Julie Konzuk is a Senior Principal Engineer based in Ontario with more than 20 years of experience focused on working with clients in Canada, Australia and the United States on developing and i ...
  • J. Chris Herin, P.G.
    J. Chris Herin is a Senior Principal Hydrogeologist practitioner in the field of environmental risk management and minimization based in Florida with more than 30 years of environmental consulting ...
  • David Reynolds, Ph.D., P.Eng.
    David Reynolds is a Senior Principal Engineer and Australian Operations Manager based in Sydney. He specializes in the development and implementation of groundwater remediation technologies and man ...
  • Howard Cumberland
    Howard Cumberland is a Senior Principal Marine Scientist with more than 25 years of experience focused on remedial strategies for clients as well as developing and implementing remedial investigati ...
  • Scott Drew, LSRP, LSE
    Scott Drew is a Senior Principal Environmental Scientist based in New Jersey with more than 25 years of experience focused on the fields of environmental technology, site remediation, and environme ...
  • Tom Peel, Ph.D.
    Tom Peel is a Senior Principal based in Florida with more than 20 years of experience focused on environmental science and engineering including the development of regulatory and risk-based strateg ...
  • Chriso Petropoulou, Ph.D., P.E., BCEE
    Chriso Petropoulou is a Senior Principal Environmental Engineer based in Illinois with more than 25 years of consulting experience focused on a wide variety of clients in the industrial manufacturi ...
  • Michael McGuire, P.E.
    Michael McGuire is a Senior Principal Environmental and Civil Engineer based in California with more than 30 years of experience focused on characterizing and remediating sites affected by past ind ...
  • Keith Tolson, Ph.D.
    Keith Tolson is a Senior Principal Environmental Scientist based in Florida with more than 15 years of experience focused on environmental sciences. He Specializes in the application of risk-based ...
  • Peter King, P.E., LSP, LEP
    Pete King is a Principal Engineer based in New England with more than 30 years of experience focused on the integration of environmental regulations and policies with his clients' industrial, insti ...
  • Gregory Gibbons, P.E.
    Gregory Gibbons, P.E., a Principal at Geosyntec, is an Environmental Engineer based in Illinois with more than 35 years of experience focused on the investigation and remediation of contaminated se ...
  • Scott Graves, P.E.
    Scott Graves is a Principal Engineer based in Texas with experience focused on geotechnical, environmental, and water resources engineering. Scott specializes in landfill design and permitting, was ...
  • Bruce Marvin, P.E.
    Bruce Marvin is a Senior Principal Environmental Engineer based in California with more than 15 years of consulting experience focused on remediation strategy development, technology selection, eng ...
  • Michael Lodato, P.G.
    Michael Lodato is a Principal Geologist based in Florida with more than 25 years of experience focused on the field of hydrogeology, site assessment, and remediation using innovative technologies. ...
  • Sean Ragain, R.G.
    Sean Ragain is a Senior Principal Geologist based in Oregon with more than 25 years of experience focused on providing hydrogeologic and environmental consulting services to both private industry c ...
  • Marcus Ford, CGeol.
    Marcus Ford is a Senior Principal Hydrogeologist based in the United Kingdom with nearly 30 years of experience focused on environmental liability management and the assessment and remediation of c ...
  • Peter de Haven, P.E.
    Peter de Haven is a Senior Principal Engineer based in North Carolina with 20 years of experience focused on site characterization, data management and analysis, numerical modeling, and both the co ...
  • Ruth Custance
    Ruth Custance is a Senior Principal Environmental Scientist based in California with more than 20 years of experience focused on the development and effective communication of risk-based approaches ...
  • Elaina Modlin, P.E.
    Elaina Modlin is a Principal Environmental Engineer based in Florida with more than 20 years of experience focused on a wide variety of environmental services including regulatory compliance and pe ...
  • Todd Creamer, P.G.
    Todd Creamer is a Principal Geologist based in New England with more than 22 years of experience in environmental consulting services, surface water hydrology, and oil and natural gas exploration a ...
  • James Langenbach, P.E.
    James Langenbach is a Senior Principal Environmental Engineer for Geosyntec Consultants based in Florida with more than 20 years of experience focused on assisting clients with environmental assess ...
  • Peter Dollar
    Peter Dollar is a Principal Consultant based in Ontario with more than 20 years of experience focused on site characterization, remediation strategy, remedial design and implementation, and risk ma ...
  • James Linton
    James Linton is a Principal Environmental Scientist based in Florida with more than 30 years of experience focused on site assessment and remediation. He specializes in innovative contaminated site ...
  • Scott Luettich, P.E.
    Scott Luettich is a Principal Geotechnical Engineer and Director of Engineering for Geosyntec's solid waste management practice based in New England. He has more than 25 years of experience as the ...
  • Brent Miller, P.E.
    Brent Miller is a Senior Principal Chemical Engineer based in Washington with more than 28 years of consulting and industry experience focused on the evaluation, design, construction, operation, an ...
  • Thierry Sanglerat, P.E.
    Thierry Sanglerat is a Senior Principal Civil Engineer based in California with more than 30 years of consulting experience focused on groundwater and soil remediation, brownfield site redevelopmen ...
  • Cuneyt Gokmen, P.E.

    Cuneyt Gokmen is a Senior Principal Geoenvironmental Engineer with more than 20 years of experience focused in the areas of civil, geotechnical, and environmental engineering.

  • John Gallinatti, CHG
    John Gallinatti is a Senior Principal Hydrogeologist based in California with more than 25 years of experience focused on quantitative hydrogeology, including groundwater modeling, environmental fa ...
  • Robert Glazier, P.G.
    Robert Glazier is a Principal Environmental Consultant based in Maryland with more than 30 years of experience focused on site remediation, risk assessment, and environmental permitting associated ...
  • Eric Nesbit, P.E., CQM
    Eric Nesbit is a Senior Principal Environmental Engineer with more than 15 years of experience focused on program management, executing environmental remediation actions, removal actions, and remed ...
  • Brian Hitchens, P.G., CHG
    Brian R. Hitchens is a Senior Principal Hydrogeologist based in California with more than 15 years of experience focused on the evaluation and improvement of groundwater and surface water impacted ...
  • Daniel Schauer, P.G.
    Daniel Schauer is a Senior Principal Geologist based in Florida with over 24 years of geological, hydrogeological, and geotechnical engineering consulting experience focused on multidisciplinary en ...
  • Jennifer Wilkie, Ph.D., P.E.
    Jennifer Wilkie is a Principal Engineer based in Illinois with more than 20 years of experience in environmental research and consulting focused on providing multidisciplinary services and support ...
  • Robert Ferree, CPG
    Robert Ferree is a Senior Principal Geologist based in Michigan with more than 30 years of experience focused on hydrogeologic investigations; remedial investigations; underground storage tank (UST ...
  • John Seymour, P.E.
    John Seymour is a Senior Principal Civil Engineer based in Illinois with over 30 years of experience focused on site remediation, deep foundation engineering, and construction management. His clien ...
  • Gary Wealthall, Ph.D.
    Gary Wealthall is a Senior Principal Consultant based in United Kingdom with more than 25 years of experience focused on contaminant hydrogeology research and practice. He advises regulatory author ...
  • Kenneth Fredianelli
    Kenneth Fredianelli is a Principal Construction Management Professional based in California with more than 30 years of experience focused on managing engineering, construction, and design/build pro ...
  • Andrew Montgomery, P.E.
    Andrew Montgomery is a Senior Principal Engineer based in Georgia with more than 20 years of environmental consulting experience focused on developing regulatory and risk-based strategies to achiev ...
  • Leah MacKinnon, M.A.Sc., P.Eng.
    Leah MacKinnon is a Principal Engineer with more than 20 years of professional experience in the United States, Canada, and Europe focusing on remediation of groundwater containing recalcitrant and ...
  • Veryl Wittig, P.G., CHG
    Veryl Wittig is a Senior Principal Hydrogeologist based in California with more than 20 years of experience focused on complex environmental site assessment, hazardous materials management, and reg ...
  • Jamey Rosen, P.Geo.
    Jamey Rosen is a Senior Principal Geoscientist based in Ontario with more than 20 years of experience focused on Geospatial Information Management System design and development. Jamey has built sys ...
  • James Stout, BCES
    Jim Stout is a Senior Principal Environmental Scientist based in Texas with more than 31 years of experience focused on the effective management of environmental remediation projects for private an ...
  • Gordon Thrupp, Ph.D., P.G., CHG
    Gordon Thrupp is a Principal Hydrogeologist based in California with more than 25 years of experience focused on evaluating geological and hydrogeological conditions. He has specialized in quantita ...
  • James Wang, Ph.D., P.E.
    James (Yu-Sheng) Wang is a Principal Environmental Engineer based in Maryland with more than 18 years of experience focused on developing and applying innovative assessment and remediation technolo ...
  • Denise Tripp
    Denise Tripp is a Senior Consultant based in Massachusetts with more than 30 years of experience focused on environmental assessment and remediation and litigation support projects for the paper, p ...
  • Rich Kraft, P.G., CEG, CHG

    Richard Kraft is a Senior Principal Hydrogeologist based in California with more than 25 years of experience focused on diverse hydrogeologic and environmental investigation and remediation.

  • Robert Veenstra
    Robert Veenstra is a Principal Environmental Consultant based in Missouri with more than 30 years of experience focused on developing and managing complex soil, groundwater and sediment investigati ...
  • Christopher Saranko, Ph.D., DABT
    Christopher Saranko is a Principal Senior Board-Certified Toxicologist based in Georgia with more than 15 years of experience focused on evaluating potential risks associated with exposures to chem ...
  • Lisa Van Tassell, P.E.
    Lisa Van Tassell is a Senior Principal Environmental Engineer based in California with more than 15 years of experience focused on soil and groundwater remediation systems; site investigation and c ...
  • Dale Prokopchak, CIH, CSP
    Dale Prokopchak is a Principal Industrial Hygienist and Occupational Safety Specialist with more than 30 years of experience as a leader in industrial hygiene, safety, corporate environmental, heal ...
  • Jim Wragg, FGS
    Jim Wragg is a Senior Principal Hydrogeologist based in the United Kingdom with more than 20 years of experience focused on the detailed investigation, assessment and remediation of contaminated so ...
  • Jimmy Whitmer, P.G., CHMM
    Jimmy Whitmer is a Senior Principal Geologist and Hydrogeologist based in Georgia with more than 30 years of experience directing multidisciplinary projects focused on water supply development, sit ...
  • Bruce Sass, Ph.D.
    Bruce Sass is a Senior Consultant based in Ohio with more than 20 years of experience focused on the development and implementation of chemical process improvements and environmental remediation te ...
  • Eric Tollefsrud, P.G.
    Eric Tollefsrud is a Principal Hydrogeologist based in Minneapolis with more than 25 years of environmental consulting experience focused on the characterization and remediation of soil, soil vapor ...
  • Gregory Roush, P.G.
    Gregory Roush is a Senior Principal Geologist based in Georgia with more than 30 years of experience focused on directing multidisciplinary projects involving site assessments and corrective action ...
  • Suzanne Gabriele
    Suzanne Gabriele is a Principal Consultant based in Colorado with more than 25 years of professional experience focused in the areas of environmental policy and management systems development and i ...
  • Christopher Robb, P.E.
    Chris Robb is a Principal Engineer based in Wisconsin with more than 20 years of experience in environmental consulting, remediation design and construction, quality control, and project management ...
  • Trevor Carlson
    Trevor Carlson is a Principal Environmental Consultant based in Saskatchewan with more than 20 years of experience focused on environmental remediation projects including the characterization and r ...
  • Jill Johnson, P.G.
    Jill Johnson is a Principal Hydrogeologist based in Florida with more than 20 years of experience focused on a wide range of environmental projects, including groundwater monitoring and reporting, ...
Geosyntec Consultants
Geosyntec is a consulting and engineering firm that works with private and public sector clients to address new ventures and complex problems involving our environment, natural resources, and civil infrastructure.

Follow Us