Geosyntec applies reliable and innovative approaches to contaminated media investigations and assessments. We help clients address a wide array of known and emerging contaminants in soil, sediment, and groundwater. We also conduct site evaluations and discover the sources of air emissions, subsurface vapor intrusion into buildings, and contaminants in surface waters.
Our assessment specialists include some of the most respected and sought-after professionals in the environmental remediation industry. They possess the experience and technical skills to conceptualize and implement all aspects of contaminated media assessments and remediation programs. Using a multidisciplinary approach, Geosyntec brings together nationally recognized, in-house specialists in civil and geotechnical engineering, ecology and biological sciences, risk assessment and applied toxicology, and earth sciences to address the complex issues associated with contaminated media.
Our contaminated site practitioners guide our clients through specialized remediation plans, consult on regulatory strategies, and develop comprehensive cleanup approaches. We address numerous types of media, including contaminated soil, sediment, and groundwater.
Contaminated Media Services
Groundwater Assessment and Remediation
Geosyntec’s expertise in efficient site characterization, including sites that exhibit complex groundwater-flow regimes, has distinguished our firm and practitioners as leaders in the practice. Our practitioners assess and remediate a broad suite of contaminants, including metals, chlorinated organic chemicals, petroleum hydrocarbons, and emerging contaminants. We use award-winning, technology-based remediation strategies that are often first to field. Read more
Sediment Assessment and Remediation
We specialize in assessing and remediating sites where sediments have been impacted by a wide range of contaminants including metals, crude oil and refined petroleum compounds, polynuclear aromatic hydrocarbons (PAHs), pesticides, per- and polyfluoroalkyl substances (PFAS), and polychlorinated biphenyls (PCBs). Our conservation, remediation, and restoration experience includes sites ranging from small intermittent flow streams to large constructed and natural lakes and complex river, estuary, and harbor systems. Read more
Vapor Intrusion
As one of the preeminent firms for assessment and management of subsurface vapor intrusion to indoor air, Geosyntec designs innovative and best-value solutions to address our clients' most challenging projects. Our practitioners specialize in 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
Innovation in Assessment and Remediation
Geosyntec's practitioners are pioneers in site assessment and remediation. Our senior practitioners have developed and authored guidance 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 and developed a patented approach to mitigate subslab-vapor migration, allowing residential, commercial, and industrial development on sites impacted by vapor intrusion.
Our specialists collaborate with prominent national researchers from academia and government agencies to provide innovative and defensible strategies for sites with contaminated sediment, ground and surface water, soil, and air.
- We collaborated with the US Geological Survey (USGS) to remediate marsh sediments contaminated by chlorinated solvents 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 US Environmental Protection Agency (EPA) regions and the California EPA.
- Geosyntec scientists also pioneered the of genetic molecular tools to characterize the microbes in environmental media, and they 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.
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