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Emily Guyer, P.E.

Emily Guyer, P.E.
Emily Guyer, P.E.
Senior Consultant

Emily Guyer, P.E.

Senior Consultant

Ms. Emily Guyer is a licensed professional engineer with more than 15 years of experience managing complex environmental remediation projects across the United States. She specializes in integrating engineering, environmental science, and environmental law to develop technically sound, strategic, and defensible solutions for contaminated sites—particularly in complex urban waterways. Ms. Guyer leads interdisciplinary teams through all project phases, from site characterization and feasibility studies to remedial design and stakeholder engagement. She brings deep expertise in evaluating historical industrial sources, contaminant pathways, and cost drivers to inform liability allocation. ...

Ms. Emily Guyer is a licensed professional engineer with more than 15 years of experience managing complex environmental remediation projects across the United States. She specializes in integrating engineering, environmental science, and environmental law to develop technically sound, strategic, and defensible solutions for contaminated sites—particularly in complex urban waterways. Ms. Guyer leads interdisciplinary teams through all project phases, from site characterization and feasibility studies to remedial design and stakeholder engagement. She brings deep expertise in evaluating historical industrial sources, contaminant pathways, and cost drivers to inform liability allocation. Ms. Guyer regularly advises public- and private-sector clients on site investigation, remediation, regulatory compliance, natural resource damage, and liability resolution, and she has served as a consulting expert on the sources of petroleum hydrocarbons, metals, PCBs, and other contaminants. Her collaborative leadership and strong project management skills enable her to deliver high-quality, accessible work products and communicate effectively with clients, regulators, and other stakeholders to resolve environmental challenges and achieve project goals.

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Litigation Support

Expert Mediation Settlement Support, Confidential Superfund Site, New Jersey Technical and strategic support for a PRP group for a site with collocated arsenic, waste oils, and tar processing residuals, with multiple forms of light and dense non-aqueous phase liquids (NAPLs) in unsaturated/saturated soils, groundwater, and river sediments. Provided conceptual site model and engineering support for constituent fate and transport, forensic chemical characterization, and cost estimation evaluations. Served as the task manager and primary technical support to experts during the development of an allocation framework, including cost scenarios for negotiations with other parties considering future site redevelopment, use of Gore factors, and other criteria. Helped develop risk management objectives, conceptual remedial alternatives, cost analysis, and cost forecasting in support of technical dispute resolution. Assisted in the preparation of an allocation report and mediation statement, delivered technical presentations to a mediator, and sat at the mediation table and provided key technical support during negotiations. Supported the successful defense of the client group against a significant third-party cost claim, ultimately reducing the claim by more than two orders of magnitude for the upland portion of the site and eliminating costs entirely for remediation and natural resource damages liability for river sediments.
Cost Allocation, Confidential Sediment Superfund Site, New York Served as project manager and consulting expert providing technical support to a small industrial party for liabilities associated with historical manufacturing operations at a complex urban waterway site contaminated with PAHs, PCBs, metals, and NAPLs, including tar from multiple sources. Evaluated chemical fate and transport and remedial cost drivers. Performed source identification, risk assessment, and bioavailability evaluations. Quantified and determined the fate of historical contaminant loadings. Carved out remedial design and construction costs related to sources. Partnered with counsel to prove to the allocator that the client’s liabilities were de minimis.
Consulting Expert Support, Confidential Superfund Site, Washington Act as project manager and consulting expert for an industrial client with liabilities associated with historical manufacturing activities at a complex urban waterway site. Conduct historical operations research, environmental data analysis, mapping, remedy driver and cost evaluations, chemical fate and transport evaluations, report and disclosure document preparation, and expert witness support. Partner with the client and outside counsel to develop an innovative approach to resolve liabilities. Lead a team to develop sampling and analysis and permitting plans for sediment remediation and intertidal mudflat, marsh, and riparian habitat restoration. Act as consulting team expert and trusted client advisor for cost allocation and resolution of natural resource damages. Ongoing matter.
Sediment Cleanup and Cost Allocation Support, Confidential Superfund Site, Washington Acted as project manager for Cleanup Action Plan phase and expert witness for allocation of sediments impacted with PAHs, PCBs, and dioxins at a Model Toxics Control Act cleanup site. Also acted as lead author of an expert report for allocation of sediment cleanup and natural resource damages. Supported client by leading a multidisciplinary expert team, converging expertise in sediment transport and analysis of sewer discharges.
Allocation Support for Multiple Sediment Sites, Upstate New York Provided consulting expert support and project management. Performed reviews of historical operations and remedial design documents and assessed remedy cost drivers and physical and forensic chemical characteristics to distinguish sources of PAHs, metals, and NAPLs in lake and tributary sediments in upstate New York.
Litigation Support, U.S. West Coast Served as project manager for a confidential matter involving a broad assessment of causation related to an emerging stormwater contaminant on the U.S. West Coast. Led a multidisciplinary team of scientists and engineers to evaluate the latest science and literature and multiple candidates for potential impairments to threatened and endangered species. Coordinated technical strategy and stakeholder engagement in support of ongoing litigation.
Consulting Expert Support, Superfund Site, Illinois Serve as project manager for a confidential Superfund matter involving an initial liability assessment for a small railroad party. Direct records collection and analysis from university and national archives to evaluate historical operations and assess potential liabilities of the client and other PRPs. Lead a technical review of the proposed CERCLA remedy to inform the client’s response to a special notice letter. Ongoing matter.

Remedial Design

Pearl Harbor Sediment Remediation, Hawaii Acted as task manager and design engineer for a range of projects conducted for an electrical utility in association with the U.S. Navy’s planned Superfund cleanup of PCB-impacted sediments in Pearl Harbor. Reviewed and opined on the Navy’s RI/FS documents and conducted an ongoing PCB source tracing and source control design project at a power plant to identify and control ongoing upland sources of PCBs and ensure source mitigation. Mitigation measures include soil and sediment removal, capping, and sewer cleaning.
Former Manufactured Gas Plant (MGP) Site, Newark, New Jersey Evaluated and selected remedial alternatives for MGP-contaminated soil. Performed as project engineer to develop design plans for interim remedial measures, including preparation of engineering drawings. Prepared construction bid specifications for soil remediation. The scope of the project involved the installation of an approximately 1,500-linear-foot barrier wall, excavation of 54,000 cubic yards of soil, construction of a 1.2-acre engineered cap, and in situ oxidation. An active business was present on site and continued to operate during all phases of the remedial activities. Work also included all permitting necessary for implementation of the remedy and oversight. Also served as project engineer to develop the final site plan for City of Newark approval. Work included preparation of site restoration drawings, calculations, and details for a commercial parking lot to be constructed at the site after completion of remedial activities. Detailed design included layout of the 52,000-square-foot parking lot in accordance with local codes, including stormwater drainage, lighting, and landscaping design and a traffic flow analysis. This work included close coordination with city engineers and members of the City of Newark Central Planning Board.
Lower Passaic River Superfund Site, New Jersey Performed feasibility studies for five sediment remedial alternatives for the >17-mile site. Technical support included dredged material management, future waterway users, residuals management, and technology evaluations. Acted as primary author on cost estimates and supporting calculations. Dredge material management options included confined aquatic disposal, open water disposal, and confined upland disposal. Performed an assessment of navigation channel deepening during cleanup and evaluated options for beneficial reuse of dredged material under the New York/New Jersey Harbor Dredge Material Management Plan.
Soil and Sediment Remediation at a Former MGP Site, New York Prepared the remedial design work plan and engineering design documents for regulatory approval, including engineering drawings, a sampling and analysis plan, a citizen participation plan, design mix testing requirements, specifications, and other ancillary plans for the remediation of upland soil and sediment at a former MGP site.  Selected remedial technologies included in situ solidification, removal, and capping.
Remedial Design and Site Reclassification of a Commercial Site, Great Neck, New York Prepared remedial design documents and drawings for a chlorinated solvent site in Great Neck, New York.  Remedial design components included an upgrade of a sub-slab depressurization system (SSDS) with electrical performance/operational monitoring components.  Also performed a confirmatory round of groundwater sampling and worked closely with regulators to reclassify the site.
Multiple Sites throughout Brooklyn, Queens, Bronx, Manhattan, and Staten Island, New York Assisted in preparation of remedial design specifications and drawings for multiple sites throughout New York City.  Remedial design components included gas vapor barriers and SSDSs for new commercial building and school construction.  Assisted in collaborations with architects to incorporate environmental design into overall new construction design packages.
Feasibility Studies for Multiple Media at Former MGP Superfund Sites, New York Prepared feasibility studies to address MGP-related contaminants above applicable or relevant and appropriate requirements in soil, sediment, and groundwater.  Feasibility study reports included a summary of existing conditions; identification of standards, criteria, and guidance; development of remedial action objectives; identification and screening of remedial technologies and process options; development of alternatives for each media and a detailed analysis of the alternatives; a comparative estimate of capital and operation and maintenance costs; and the selection of a preferred remedy for each contaminated medium.
Remedial Action Work Plan for PCB Remediation, New Rochelle, New York Prepared the remedial action work plan for the remediation of PCBs in soil at a former military facility located on an island.
Former Metals Plating and Metals Products Sites, New Jersey and New York Prepared feasibility studies and engineering design plans for contaminated soil and groundwater at Superfund sites.  Prepared the feasibility study to address contamination of inorganic chemicals in soil, volatile organic compounds (VOCs) and semivolatile organic compounds (SVOCs) in groundwater and surface water, and inorganic chemicals and SVOCs in sediments.  Technologies included soil excavation, ex situ groundwater treatment, and sediment capping.  Also provided risk management support, including presentations to the public.  Evaluated state land use (freshwater wetlands, flood hazard area) permit issues associated with construction of the groundwater treatment plant.  Prepared remedial design documents and freshwater wetlands and flood hazard area submittals to the New Jersey Department of Environmental Protection, Land Use Regulation Program.
Soil Erosion and Sediment Control Plans, New Jersey Prepared multiple soil erosion and sediment control plans, including engineering drawings, for approval from local soil conservation districts for remedial construction activities.
Model Toxics Control Act Sediment Site, Seattle, Washington Project manager for feasibility study support and an engineering evaluation on the dredgeability of sediments.

Site Investigation

Former Dry Cleaners, Mukilteo, Washington Serve as project manager for a former dry cleaner site with residual perchloroethylene (PCE) and trichloroethylene (TCE) contamination in soil. Oversee long-term compliance with the site’s environmental covenant, including annual reviews and periodic vapor intrusion assessments. Manage the collection of sub-slab soil vapor, indoor air, and outdoor air samples in accordance with Washington State Department of Ecology’s vapor intrusion guidance for the state’s cleanup sites to evaluate exposure risks and ensure continued protectiveness of the remedy.
Former MGP Site, Missoula, Montana Act as project manager and communications lead for the environmental assessment and remedial proposal for a former MGP. Lead a multidisciplinary team and advise the client as part of an ongoing project. The scope includes multiple rounds of soil and groundwater sampling to characterize site conditions and support the environmental assessment and remedy evaluation. Responsible for managing multiple subcontractors and coordinating technical activities across disciplines.
Fuel Oil Terminal, Brooklyn, New York Served as project manager for remedial investigation and engineering and liability support. Prepared the remedial investigation work plan, managed field activities for the remedial investigation, and supported preparation of the remedial investigation report for a fuel oil terminal in Brooklyn, New York. Also acted as design engineer for a solar-powered light NAPL recovery system. Field activities included the collection of soil, groundwater, and light NAPL samples in addition to product recovery system installation oversight. Strategic remediation management and close coordination with multiple stakeholders successfully removed the fuel oil terminal client from liabilities at an adjacent property, and the regulatory agency granted a “No Further Action” designation for the site.
In Situ Oxidation Treatment of PCE–Contaminated Groundwater at a Superfund Site, Upstate New York Provided task management and execution of a 10,000-gallon in situ chemical oxidation treatment of PCE-contaminated groundwater. Provided consultation to the EPA project manager and the New York State Department of Environmental Conservation project manager as the project was transitioned from EPA to the State of New York. Provided installation oversight and managed five subcontractors with four mobilizations. Performed work in harsh winter weather, in confined space entry conditions, and inside abandoned buildings for most of the subsurface effort. Obtained a shared vision with the client on a revised injection approach when subsurface conditions varied from previously documented information. Groundwater monitoring data demonstrated that an overall decrease in VOC contamination to achieve below-treatment goals was successful.
Environmental Due Diligence, Multiple Sites, New York and New Jersey Performed multiple Phase I environmental site assessments (ESAs) for redevelopment projects throughout the New York City metro area.  Work included site inspections, Phase I ESA reporting, and probabilistic cost estimation for remediation and redevelopment scenarios.
Ecological Risk Assessment at PCB-Contaminated Commercial Site, New Jersey Performed fieldwork associated with the ecological risk assessment for a site contaminated with PCBs.  Work included supporting the risk assessment lead in small mammal collection for laboratory analysis.
Ecological Risk Assessment at PCB-Contaminated Federal Site, Virginia Performed fieldwork associated with the ecological risk assessment for a federal site contaminated with PCBs.  Work included shellfish collection for laboratory analysis.
Groundwater Investigation, Great Neck, New York Conducted low-flow groundwater sampling to confirm the site was not a contributing source of VOCs to groundwater.
Phase II Investigation and Liability Support, Brooklyn, New York Planned, managed, and oversaw the collection of soil and groundwater samples to investigate areas of concern and potential CERCLA liability at a site located along an urban waterway.
Chemical Forensics Sampling, Multiple Sites, New York and New Jersey Supported environmental forensics experts in collection of surface soil, surface sediment, surface water, and sheen samples for forensics analysis.
Free Product Delineation, Long Island City, New York Provided task planning and field oversight for delineation of free product via laser-induced fluorescence at a site in Long Island City.  Delineated a small volume of free product in the subsurface and performed recovery and confirmatory groundwater sampling to achieve site closure.
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