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Class Action Analysis: PFAS Impacts from Metal Plating Facility

Expert Witness and Legal Support, Forensic Hydrogeology, PFAS, Site Assessment and Characterization /

Independent forensic hydrogeologic review of soil and groundwater data to evaluate PFAS source attribution and class certification implications.   Why This Engagement Mattered PFAS detections in private wells formed the technical basis for a proposed class action. Class certification depended on whether observed PFAS conditions could be attributed to a single facility-related source or reflected […]

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Forensic Evaluation of PFAS Contamination at Air National Guard Base

Chlorinated Solvents and DNAPL, Forensic Hydrogeology, PFAS, Site Assessment and Characterization /

Evaluated groundwater data, including chemical signatures based on 21 PFAS compounds across shallow, intermediate, and deep aquifer zones. The analysis integrated groundwater flow directions, potential source locations, and chemical compositions from both on-site and off-site sources. Key conclusions highlighted the identification of off-site PFAS sources north of the site and attributed PFAS detections in the

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Animation of Pump and Treat Remediation

Communication and Education, Expert Witness and Legal Support, Fate and Transport, Visualization /

This animation was created using a custom animation technique – offering teams a clear, cost-effective alternative to traditional groundwater modeling software. It can be designed to support litigation, including courtroom presentations and expert testimony, while also serving corporate remediation leads, environmental consultants, and regulators who need to communicate site conditions to the public and other

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Simulation of DNAPL Contamination in a Fractured Rock Aquifer

Chlorinated Solvents and DNAPL, Communication and Education, Expert Witness and Legal Support, Fractured Rock Hydrogeology, Visualization /

This simulation illustrates some fundamentals of dense non-aqueous phase liquid (DNAPL) transport in fractured rock.   A unique aspect of this video is that the simulation is created using a custom animation technique without the use of complex groundwater modeling software. This cost-effective method provides a clear, intuitive way to communicate site conditions to stakeholders, making it an

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“Groundwater Pollution for Beginners”

Chlorinated Solvents and DNAPL, Communication and Education, Fate and Transport, Visualization /

This educational video is aimed at those unfamiliar with groundwater resources and groundwater contamination. The exclusion of audio is purposeful; the video guides the “reader” during the groundwater contamination simulation and visualization of groundwater plumes. This “animated reading” approach enables self-paced learning, including further contemplation when needed by pausing the video without losing the value

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PFAS Signatures in Surface Water due to Petroleum Refinery Wastewater

Communication and Education, Fate and Transport, Forensic Hydrogeology, PFAS, Sediment and Surface Water, Visualization, Wastewater /

This educational video illustrates how per- and polyfluoroalkyl substances (PFAS) enter and move through surface water systems due to wastewater discharges from a petroleum refinery. Using a visually intuitive approach, the video helps viewers understand how different PFAS compounds, including telomers associated with AFFF (aqueous film-forming foam), appear in environmental samples.   Key Topics Covered:

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Animation of Leaching Hazardous Waste Landfill

Chlorinated Solvents and DNAPL, Expert Witness and Legal Support, Visualization /

This animation illustrates groundwater pollution caused by improperly buried hazardous waste. It is based on analysis of site chemical and historical data at a Superfund site to identify nature and extent of soil and groundwater contamination due to buried drums of paint sludge. Key hydrogeological and contamination concepts illustrated include:   Leaching of Hazardous Waste

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Groundwater Plume Modeling for Remedial Design

Fate and Transport, Modeling, Site Assessment and Characterization, Unique Analytical Methods /

Simulated chemical retardation and biodegradation of benzene and MTBE plume using MODFLOW, MODPATH, and MT3D. Model used as a design tool to define an optimal system layout at JFK International Airport.   Custom analytical tool: Created graphical interface via Excel VBA programming to query a remediation performance database and visualize multi-well extraction system performance.  

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Aquitard Matrix Diffusion Modeling

Chlorinated Solvents and DNAPL, Fate and Transport, Modeling, Site Assessment and Characterization, Unique Analytical Methods /

Identified lines of evidence regarding whether a deep aquifer is impacted by a shallow, contaminated aquifer. Study included X-ray analysis of aquitard clay samples to identify potential secondary pathways for DNAPL migration (such as root holes and burrows), analysis/modeling of advection and matrix diffusion of several chemicals in the aquitard.      

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Hexavalent Chromium Superfund Site – Characterization and Remediation Pilot Test

Chlorinated Solvents and DNAPL, Fate and Transport, Site Assessment and Characterization /

Characterized source and extent of PCE and hexavalent chromium plume that originated at a former metal plating facility. Conducted nanoscale zero-valent iron (nZVI) remediation pilot test. Frequent interaction with USEPA Region II and US Army Corps of Engineers. The site is located in Franklin Square, New York.

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