Overview of Contaminated Site Assessment and Cleanup

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.