Brownfield Redevelopment Planning and Design

Working with public and private sector clients, Geosyntec provides award-winning redevelopment strategies for brownfield sites worldwide. From site identification, investigation, and remediation to design, permitting, and construction management, we provide the services necessary to redevelop an environmentally impacted property to an end use that meets environmental stewardship, regulatory compliance, and stakeholder needs. We solve our clients' brownfield redevelopment challenges using appropriate and efficient environmental remediation approaches as well as geotechnical engineering solutions.

Geosyntec approaches each brownfield site individually by tailoring investigations, risk assessments, and remediation approaches to the clients' planned end use. We work with stakeholders including regulators, developers, and insurance providers to realize the full economic and social value of their site and develop solutions amenable to all parties for any challenges that arise as development progresses. We provide stakeholders with start-to-finish consistency and reassurance that the environmental elements of development are being managed by one firm because of our expertise in regulations, risk assessment, soil and groundwater remediation, soil vapor mitigation, geotechnical and geoenvironmental engineering, and solid waste and environmental management.

Specialized Experience with Brownfield Sites

Applications for Grants: Geosyntec offers assistance with grant application preparation and financial analyses for clients considering participation in government-sponsored brownfield programs.

Site Assessments: Our environmental management specialists perform site evaluations ranging from informal site walks and/or document reviews to formal Phase I due-diligence services in accordance with ASTM E 1527-05. If necessary, we provide follow up with Phase II site investigations.

Risk Assessments: Geosyntec's in-house toxicologists and risk assessment specialists work with developers to reduce the cost of redevelopment using three key strategies: 1) optimized site layout to separate receptors from environmental impacts, 2) use of engineering controls to manage contamination in place rather than costlier and more extensive removal or remedial measures, and 3) identify building or landscaping design features that provide cost-effective risk mitigation (e.g., aerated floors, grade-level parking, surface covers, etc.).

Geoenvironmental Engineering: Our geoenvironmental and geotechnical engineers develop design approaches to stabilize, contain, and control conditions beneath foundations to allow construction of buildings, parking lots, or other developed surfaces to meet end-use goals on previously unusable or unstable ground.

Vapor Mitigation: Geosyntec engineers mitigate solvent, petroleum, and methane vapors using a wide range of time-tested and innovative passive and active technologies, including traditional vapor barriers, our own patented sub-slab vapor venting system, and low-cost, highly efficient aerated floors.  We effectively disrupt the exposure route for indoor air, reducing potential hazards and allowing building development over impacted areas of the site. Our site-specific designs work hand-in-hand with the development team's foundation and architectural design elements. Geosyntec is performing leading research for the U.S. Department of Defense on vapor mitigation optimization.

Green Energy Solutions: Our engineers assess both the engineering and regulatory feasibility of green energy development on impacted sites. We provide permitting services, preliminary design, and site improvement recommendations to support wind and solar energy development.

Construction Services: Geosyntec's in-house construction services group provides constructability reviews, bid support, construction quality assurance, and construction management services.

Geosyntec's practitioners are advancing the state of the practice by writing the guidance documentation, teaching courses, and acquiring design patents that enable brownfield redevelopment. We authored or co-authored vapor intrusion guidance documents issued by several industry groups and State agencies, and have been members of the U.S Environmental Protection Agency (EPA) expert panel on vapor intrusion since its inception in 2000.

Geosyntec personnel have been key members of both Interstate Technical Regulatory Council (ITRC) working groups on vapor intrusion, and invited instructors for the classroom and web-based training that included thousands of regulators and other stakeholders. Our practitioners also wrote the guidance document on evaluating, optimizing, or ending post-closure care at impacted sites, including brownfield sites, and are working with regulators to incorporate our approaches into regulations.

Our 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; contaminated site, waterway, and sediment assessment and remediation; and solid, hazardous, and low-level radioactive (LLR) waste disposal facility permitting and design. He is a licensed professional engineer in 17 states. Examples of Rudy's practice experience include serving as: design engineer- ...
  • Karen Kosiarek, P.E.

    Karen Kosiarek is a Senior Consultant Remediation Engineer based in Montana with more than 15 years of experience focused on the characterization and remediation of soil and groundwater contamination at industrial and commercial properties. Prior to relocating to Montana, Karen practiced in Southern California for 14 years. For more than 50 brownfield redevelopments, remediation sites, and landfills in Southern California, Karen provided design and consulting services. Her professiona ...
  • 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 worked extensively with large PRP groups within the CERCLA program. Susan is a recognized leader in the development of remedial approaches for waterways with contaminated sediments and associated floodplain soils. She has served as project manager for the feasibility study of one of the larges ...
  • Michael Berman, P.E., CHMM

    Michael Berman is a Senior Principal Engineer based in Maryland with more than 18 years of experience focused on evaluating the nature and extent of environmental contamination or developing models for estimating environmental liabilities to support his clients' business decisions. Corporate managers, financial analysts, and industry counsel know that environmental conditions and their regulatory consequences can significantly impact their business decisions and ongoing operations. To ...
  • 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 remediation, demolition and remediation of former industrial sites, and consulting on projects involving complex geotechnical and civil engineering issues. He has extensive experience managing complex projects involving municipal solid waste, hazardous waste, ash, coal combustion products, low-level ra ...
  • Randy Brandt, P.G.

    Randy Brandt is a Senior Principal Geologist based in California with more than 25 years of experience focused on hydrogeology with special emphasis on the return of sites environmentally impacted by past industrial manufacturing activities and former military installations surplused through the Base Realignment and Closure (BRAC) process to productive uses. Randy specializes in development and implementation of soil and groundwater characterization programs for contaminated sites ass ...
  • Paul Botek, P.G.

    Paul Botek is a Principal Geologist based in Maryland with more than 15 years of experience focused on the assessment and restoration of contaminated sites, provision of environmental management services, consulting on solid waste management facility permitting and closures, remediation construction management, and spring water supply studies. For the evaluation and selection of field investigation methods for subsurface investigation, Paul is considered a go-to professional. His clie ...
  • Peter Zeeb, Ph.D., P.G., LSP

    Peter Zeeb is a Senior Principal Hydrogeologist based in Massachusetts with more than 20 years of experience focused on investigation and remediation strategy at some of the most challenging sites in the country, including CERCLA-regulated sites in New England and the Midwest, as well as numerous state-regulated sites. Specializing in site investigations, modeling, pilot tests, remedial strategy development/alternatives analyses, and full-scale remedy design for more than 20 years, Pe ...
  • Michaye McMaster, M.Sc

    Michaye McMaster is a Senior Principal Remediation Scientist based in Ontario with more than 15 years of experience focused on the development, field testing, and general application of in situ biological systems to remediate soil and groundwater. She has years of experience in developing remedial solutions for sites impacted by chlorinated solvents in groundwater using bioremediation and bioaugmentation as key treatment components of comprehensive remediation strategies. Specializing ...
  • Neal Durant, Ph.D.

    Neal Durant is a Senior Principal Engineer based in Washington, D.C. with more than 28 years of experience investigating, remediating, and managing complex contaminated sites. Neal serves as a consultant and advisor to multi-national corporations and government agencies on matters involving quantification, management, and remediation of environmental liabilities. His clients include information technology service companies, aerospace manufacturers, industrial chemicals manufacturers, ...
  • David Folkes, P.E.

    David Folkes is a Senior Principal Environmental Consultant based in Colorado with more than 35 years of experience focused on environmental and geotechnical consulting throughout the United States and Canada. One of the nation's foremost experts on vapor intrusion (VI) evaluation and mitigation, Dave was invited by U.S. EPA to address the national Resource Conservation and Recovery Act meetings held in 2000 and 2002 on VI issues impacting sites throughout the country. Dave also was a ...
  • 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 including chlorinated solvents, creosote, and coal tars. He is a professional geologist with expertise in developing assessment, remediation, and closure strategies. Beau is a Registered Site Manager under the North Carolina Registered Environmental Consultant Program, the voluntary remediat ...
  • 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 containment facilities and brownfield sites impacted by contaminants in soil, soil gas, and groundwater.  During his career, he has become a recognized national expert in the design, permitting, and construction of liner and cover systems for municipal, industrial, mine, mill, and haza ...
  • Michael Houlihan, P.E.

    Michael Houlihan is a Senior Principal Engineer based in Maryland with more than 30 years of experience focused on industrial and municipal waste management, waste containment system design, geotechnical engineering, environmental remediation, revitalization of impaired properties, construction engineering, and litigation support, including expert witness work.  Examples of his recent projects include: closure and remediation of coal-ash disposal sites at electric-power generating st ...
  • Nandra Weeks, P.E.

    Nandra Weeks is a Senior Principal Environmental Engineer based in Florida with more than 20 years of professional experience focused on the engineering and remediation issues associated with environmentally-impaired property redevelopment. She also specializes in the design and implementation of environmental compliance and site remediation programs at municipal solid waste landfills, coal combustion product disposal sites, and other properties. Nandra has developed site-specific app ...
  • 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; assessment and mitigation of the vapor intrusion pathway; environmental due diligence and liability valuation; and regulatory compliance.Among Jeff's key strengths is his broad experience helping clients manage investigations and corrective actions at complex sites contaminated by chlorinated so ...
  • Mark Grivetti, P.G., CHG, CEG

    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 groundwater resource management, and engineering geology studies for a wide range of projects. He brings creative environmental solutions to the redevelopment of complex sites impacted by soil and groundwater contamination. Mark's worldwide experience in the investigation and remediation of comple ...
  • 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 25 years of experience focused on the mitigation of environmentally impaired properties, environmental compliance, due diligence (All Appropriate Inquiry), and cost-to-cure estimates. He also specializes in groundwater studies, contaminant fate and transport evaluations, and waste management. He is often tapped to serve as a technical ...
  • Keith Tolson, Ph.D.

    Keith Tolson is a Senior Principal Environmental Scientist with more than 15 years of experience focused on environmental sciences. He Specializes in the application of risk-based principles to support legal and regulatory requirements. Keith provides expert technical and strategic consultation on matters related to regulatory compliance and litigation. He also develops and supports public risk communication concerning the health effects of chemicals in air, water, soil, sediments, consumer p ...
  • 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 strategies to obtain cost effective closure and redevelopment for environmentally impacted properties. He specializes in applying innovative risk-based approaches to reduce the cost of site assessment and remediation activities. Tom has directed investigations and remedial strategy development for ...
  • Todd Hagemeyer, P.G.

    Todd Hagemeyer is a Senior Principal Hydrogeologist based in Georgia with more than 25 years of experience focused on development of environmental management solutions for the manufacturing and service facilities of Fortune 500 companies and the remediation of commercial and public sector properties impacted by chlorinated solvents, metals, and petroleum hydrocarbons. Todd has years of experience managing and implementing environmental projects that include hydrogeologic site characte ...
  • 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 permitting, risk management, environmental due diligence, and contaminated site assessment and remediation. Serving as Geosyntec's program director for transactional, regulatory compliance, and environmental permitting services for key clients in the energy and transportation sectors, Elaina's ...
  • 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 for site assessment and remediation. Ruth has lead project teams in utilizing the latest risk assessment and data analysis technologies to optimize remedial approaches. These approaches provide adequate risk reduction while being cost-effective. She has provided critical input into the risk ...
  • 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 technologies. Mary has practical experience bringing in situ remediation technologies addressing recalcitrant organics and metals from bench and pilot scale applications to practical field applications. She has applied technologies such as biostimulation and bioaugmentation to impacted soil and groundw ...
  • 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 conceptual and final design of engineered remediation measures for groundwater, soils, and sediments. Pete has performed comprehensive project management, team leadership, and a broad range of technical services for projects and facilities in 25 U.S. states and territories and the United Kingd ...
  • Neil Davies, C.Eng., P.E.

    Neil Davies is a Senior Principal Civil and Environmental Engineer based in Georgia with more than 25 years of experience focused on the environmental remediation of former industrial manufacturing sites, and the design of civil infrastructure projects located throughout the United States and Europe. Specializing in the management and technical direction of large multidisciplinary civil and environmental infrastructure projects, Neil's project experience includes treatment systems, pi ...
  • Bertrand Palmer, Ph.D., P.E.

    Bertrand Palmer is a Senior Principal Engineer based in California with more than 20 years of experience focused on developing innovative approaches and designs for projects involving site assessment, remedial investigation, feasibility study, chemical fate and transport analysis, risk assessment, and soil and groundwater remediation. He is experienced in remediation system design, construction, operation, monitoring, and maintenance. With more than 20 years experience in geotechnical ...
  • Thierry Sanglerat, P.E.

    Thierry Sanglerat is a Senior Principal Civil Engineer based in California with more than 25 years of consulting experience focused on groundwater and soil remediation, brownfield site redevelopment, waste management, and site closure. He has served as an expert witness and has provided deposition and trial testimonies for several cases in state and federal courts, including the United States Environmental Protection Agency and the United States Department of Justice. As a consultant, ...
  • 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 engineering contracts for federal, municipal, and private clients throughout the U.S. and abroad. His practice focuses on construction management, construction engineering, landfill reclamation, construction QA/QC, and remedial system O&M. To assist his clients, Dan has used his geologic a ...
  • 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) removal; soil and groundwater sampling plan preparation; soil and groundwater sampling in accordance with RCRA and CERCLA guidance; surface and down-hole geophysical methods; remediation system design; remedial system installation; slug test and aquifer test performance and analysis; and environmental si ...
  • Eric Nesbit, P.E.

    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 remedial construction projects within budget and on schedule. His technical skills in design, problem solving, and process optimization have led to numerous innovative applications of proven technologies that resulted in cost savings to clients and accelerated remediation processes. Over the past ...
  • Daniel Duffy, P.E.

    Daniel Duffy is a Principal Practitioner based in Massachusetts with more than 28 years of experience focused on waste disposal facility siting, design, permitting, and construction; the post-closure use of former waste disposal sites; landfill gas system design and construction; hydrogeologic investigations and groundwater impact analysis of waste sites; the remediation of contaminated sites; facility decommissioning; and the construction of waste facilities and remediation systems. ...
  • Krzysztof S. Jesionek, P.E.

    Krzysztof Jesionek is a Principal Environmental Engineer based in California with more than 35 years of experience focused on solid and hazardous waste management, including facility design and closure, permitting, construction management, and construction quality assurance (CQA) in the United States, Canada, and Poland. As a consultant, Krzysztof has managed both site assessments and remediation projects for contaminated groundwater and soil. He has prepared permit and design docum ...
  • 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 and public sector facilities, including Superfund sites. Jim has extensive experience in providing clients solutions to their environmental challenges through site investigations and the implementation of corrective actions. His primary clients include those in the petroleum, municipal solid waste, an ...
  • James Cowart, P.E.

    James Cowart is a Senior Consultant based in Colorado with more than 35 years of experience focused on water quality permitting, industrial wastewater treatment, and watershed management throughout the United States. He also conducts numerous vapor intrusion investigations and directs large-scale voluntary cleanups for mines, manufacturing plants, and brownfield redevelopment sites, among others. Assisting clients in numerous industries, Jim has worked closely with oil and gas product ...
  • 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 achieve cost-effective site closure and redevelopment of properties impacted with chlorinated solvents, metals, and petroleum hydrocarbons. In addition, he works with Fortune 500 companies to develop and implement environmental management programs. During the past decade, Andrew has managed and pe ...
  • Stefanie Fountain, Ph.D., P.E., PMP

    Stefanie Fountain is a Principal Engineer based in Tennessee with more than 17 years of professional experience focused in the areas or radiological waste management; on-site disposal facility siting and design; site characterization and conceptual site model development; groundwater fate and transport modeling; construction management and quality assurance; and conceptual and detailed remediation system design. Stefanie's experience includes assisting clients with radiological, R ...
  • 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 characterization, including groundwater, soil, and soil gas; and litigation technical support. She specializes in developing site remediation designs, regulatory compliance strategies, work plans, feasibility studies, corrective measures studies, cost estimates, design plans and specification ...
  • Tom Krug, P.Eng.

    Tom Krug is a Principal Environmental Engineer based in Ontario focused on the evaluation and development of innovative strategies and technologies for remediation of complex contaminated properties for Fortune 500 companies, agencies of the U.S. Department of Defense (DoD), and NASA. Tom specializes in taking new technologies for remediation groundwater, sediment, soil and other waste from the early development stage to successful field scale application, and adapting new and convent ...
  • Eric Smalstig, P.E.

    Eric Smalstig is a Senior Principal Engineer based in California with more than 20 years of environmental consulting experience focusing on industrial facilities (production and waste management) assessment and remediation, Brownfields restoration for development, and surface water resource protection. Eric focuses his practice in two areas: groundwater and vadose zone remediation and surface water resource protection. His experience in remediation includes conducting investigations o ...
  • Gregory Roush, P.G.

    Gregory Roush is a Principal Geologist based in Georgia with more than 30 years of experience focused on directing multidisciplinary projects involving site assessments and corrective actions at industrial facilities found throughout the Southeastern United States. As a consultant, Greg provides practical, streamlined, and cost-effective regulatory strategies and remediation services to clients in the pulp and paper, wood treatment, pharmaceutical, chemical manufacturing, petroleum st ...
  • Melissa Schmitt, P.E.

    Melissa Schmitt is a Principal Environmental Engineer based in Washington State with more than 10 years of professional experience focused on contaminated site assessment, remediation, and regulatory compliance. She specializes in helping her clients perform site assessments and develop closure strategies, as well as design, implement, and optimize soil and groundwater remediation projects at their complex sites. Melissa's key practice experience includes program management of severa ...
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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