Sediment Assessment and Remediation

Geosyntec applies reliable and sustainable solutions to the investigation, evaluation, and remediation of sediment sites to manage human health, and ecological risk. Geosyntec applies reliable and sustainable solutions to the investigation, evaluation, and remediation of sediment sites to manage human health, and ecological risk.

Geosyntec applies reliable and innovative approaches to the investigation, evaluation, and remediation of sediment sites to manage their performance and financial, health, and ecological risks. Our practitioners’ expertise and technical skills in sediment assessment and remediation support their efforts to design and implement specialized and efficient solutions to meet our clients’ needs.

Practice Specialties

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. Geosyntec’s multidisciplinary approach brings together nationally recognized in-house specialists in engineering, ecology and biological sciences, risk assessment and applied toxicology, and earth sciences to address the complex issues associated with contaminated sediment management.

To fully comprehend and address complex sediment challenges, our practitioners employ adaptable treatability studies that provide essential data for sediment management projects to assist our clients and Geosyntec design engineers better understand the physical, chemical, and biological processes that can help mitigate potential risks. These studies are critical for understanding and demonstrating attenuation processes that can occur in sediment if natural conditions are maintained, cap material is placed on top of sediment, or enhancements are added to the sediment or cap material.

Our skills at applying advanced tools benefit our clients in the short term through real-time data generation and adaptive site management. In the long term, clients benefit from a state-of-the-practice understanding of remedy design, implementation alternatives, and an ecological risk assessment approach that looks beyond the conservative, default assumptions.

Advancing the State of the Practice

We are pioneers in sampling, analysis, and data evaluation techniques as a part of the remedial investigations. At the Berry’s Creek Superfund site, we developed new techniques for collecting deep marsh cores and innovative data evaluation processes to quantify risk at this sediment mega-site. At other sediment remediation sites, we creatively solved challenging sediment consolidation and capping scenarios to both meet regulatory requirements and exceed project goals.

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.

Geosyntec has valuable hands-on experience with a variety of advanced assessment tools. We employed one of the first applications of rapid assessment techniques to delineate dense, non-aqueous phase liquids (DNAPL) in Hudson River sediments, which was a technique that allowed the real-time continuous profiling of hydrocarbon DNAPL and measuring of geotechnical properties in sediment to support engineering evaluations and design. At a site in a Louisiana bayou, we used radioisotopes of beryllium and lead to show that at least one inch of sediment had accumulated within the year preceding the survey and that cleaner, accumulating sediments had begun to overlain the site-related contaminants. We have also designed innovative groundwater containment systems and a soil remediation program to prevent the recontamination of waterway and harbor sediments by groundwater or stormwater runoff in busy urban waterways.

Lead Consultants

  • Rudolph Bonaparte, Ph.D., P.E., D.GE, F.ASCE, NAE
    Rudy Bonaparte is a Senior Principal Engineer based in Georgia with more than 30 years of professional experience focused on the areas of: geotechnical and geoenvironmental engineering; contaminate ...
  • Nancy Bice, P.G., CEG
    Nancy Bice is a Senior Principal Engineering Geologist based in California with more than 20 years of experience focused on the characterization and remediation of sites impacted by volatile organi ...
  • 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 ...
  • 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 ...
  • 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 12 years of experience focused on environmental assessments; remedial system design and optimization; ass ...
  • David Major, Ph.D., BCES
    David Major is a Senior Principal and the Managing Director of Savron based in Ontario with more than 30 years of experience focused on negotiating, managing and directing the development and deplo ...
  • Mary deFlaun, Ph.D., BCES
    Mary deFlaun is a Senior Principal Environmental Scientist based in New Jersey with more than 20 years of experience focused on the development and implementation of in situ remediation technologie ...
  • 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 ...
  • Eric Strecker, P.E., BCEE
    Eric Strecker is a Senior Principal Water Resources Engineer based in Oregon with more than 30 years of experience focused on the design, monitoring, and evaluation of stormwater best management pr ...
  • 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 ...
  • 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 ...
  • 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 ...
  • James Linton
    James Linton is a Principal Environmental Scientist based in Florida with more than 25 years of experience focused on site assessment and remediation. He specializes in innovative contaminated site ...
  • 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 ...
  • Robert Ferree, CPG
    Robert Ferree is a Principal Geologist based in Michigan with more than 30 years of experience focused on hydrogeologic investigations; remedial investigations; underground storage tank (UST) remov ...
  • Gary Wealthall, Ph.D.
    Gary Wealthall is a Senior Principal Hydrogeologist based in Toronto with more than 20 years of experience focused on contaminant hydrogeology research and practice. He advises regulatory authoriti ...
  • 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 ...
  • Robert Veenstra
    Robert Veenstra is a Principal Environmental Engineer based in Missouri with more than 30 years of experience focused on developing and managing complex soil, groundwater and sediment investigation ...
  • Jamey Rosen, P.Geo.
    Jamey Rosen is a Senior Principal Geoscientist based in Ontario with more than 20 years of experience focused on information management system design and development and geographic information syst ...
  • Helen Douglas
    Helen Douglas is a Senior Consultant based in New England with more than 25 years of experience focused on the assessment and remediation of aquatic sites with environmentally persistent chemicals. ...
  • Amer Hussain, P.E.
    Amer Hussain is a Principal Environmental Engineer based in California with more than 25 years of experience focused on groundwater assessment and remediation, regulatory compliance, and permitting ...
  • Anne Fitzpatrick, LHG
    Anne Fitzpatrick is a Senior Principal Scientist based in Washington with more than 26 years of sediment remediation experience. She has in-depth experience managing high-profile investigation and ...
  • Alan Fowler
    Alan Fowler is a Senior Principal based in New Hampshire with more than 25 years of experience focused on the assessment and remediation of contaminated sediment. Alan is a recognized expert in the ...
Geosyntec Consultants
Geosyntec is a specialized 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.

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