Contaminated Sediments

Industries, waterfront developers, resource managers, and site owners face real challenges as they work to remediate or control environmental impacts at contaminated sediment sites. The process of addressing legacy pollution can be complex, and remediation costs can reach hundreds of millions or even billions of dollars. LimnoTech continues to advance the science and practice of contaminated sediment site management, helping our clients throughout the United States and internationally find faster, more effective, and more affordable approaches for managing sediment sites.

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LimnoTech is at the forefront of sediment site work. We are widely recognized as leaders in remedial investigation/feasibility study, cost allocation, and litigation support. Our work has contributed to solutions at the most prominent sites in the nation, including the Hudson River, the Fox River and Green Bay, the Tittabawassee River, the greater Newark Bay complex, and the Kalamazoo River. Our clients value this experience, and the perspective that enables us to rapidly identify and implement strategies and solutions that serve both the regulated community and the regulatory agencies.

LimnoTech provides a full range of sediment services to our clients, including site investigation/characterization, source identification, fate and transport monitoring and modeling, risk assessment, and remedy design. We have a strong and successful history of helping shape national policy; developing scientific, forensic and technical tools; and building, refining, applying, and interpreting environmental models for a wide range of municipal, industrial, and regulatory clients at hundreds of sites throughout the United States. This experience has included the drafting of multiple guidance and teaching documents for US EPA and Department of Defense (DoD); application of nearly every general-use watershed and surface water model supported by US EPA and other government agencies; and especially, the development and use of advanced hydrodynamic, sediment transport, and contaminant fate and transport models.

LimnoTech also has extensive experience in remedy design and support for remedy implementation, at sites throughout the United States and Canada. As site remediation approaches have broadened to reflect recent trends of ecological restoration and sustainable design, LimnoTech has stayed current, completing projects with a strong element of restoration design and integration with urban planning and waterfront development.

Talk to us! Please contact Tim, Dan or Greg to find out more about us and how we could work with you.


  • Advanced Modeling of Hydraulics, Hydrodynamics, Sediment & Contaminant Transport

  • Construction Planning & Management

  • Ecotoxicology & Ecological Risk Assessment

  • Engineering Design & Specification

  • Full Field Capabilities (hydrodynamic monitoring; bathymetric surveys; sediment probing & coring studies; sedimentation & geochronology; fisheries biology & ecological exposure monitoring)

  • Geostatistical & Forensic Contaminant Analyses

  • Hazardous Waste & Materials Management

  • Litigation Support & Expert Testimony

  • Natural Resources Damage Assessment

  • Permit Application & Negotiation

  • PFAS Investigation, Data Interpretation, Fate & Transport Assessment, Remediation Assessment

  • Pilot/Treatability Studies

  • Remedial Investigation/Feasibility Studies & Assessments


  • " ...LimnoTech provided significant leadership in the development of a focused business plan that identified the priority actions required to remove beneficial use impairments in the St. Louis River Area of Concern. The resulting St. Louis River Remedial Action Plan represents a bold and aggressive, community owned plan of action with a budget and timeline for completing our work."

    Nelson French Former Supervisor, Great Lakes - Lake Superior Unit, at the Minnesota Pollution Control Agency


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