Environmental Forensic Investigation and Technical Evaluation of Petroleum Releases, Groundwater Contamination, and Environmental Site Investigation Documentation
Project Overview
This investigation involved the review and technical evaluation of environmental records relating to petroleum contamination associated with underground storage systems and subsequent environmental site investigation activities. The materials reviewed included regulatory correspondence, technical reports, groundwater investigation records, environmental mapping, engineering documentation, geospatial analyses, and supporting environmental data prepared during the course of site assessment activities. These materials were evaluated using accepted principles of environmental forensics, hydrogeology, environmental engineering, contaminant fate and transport, and historical environmental records reconstruction.
Environmental forensic investigations involving petroleum releases frequently require the integration of multiple categories of historical and technical information to reconstruct environmental conditions and evaluate the progression of site investigations over time. Regulatory correspondence, engineering documentation, environmental sampling records, groundwater evaluations, and geospatial information each provide different perspectives regarding site characterization. When considered collectively, these independent sources of information provide a more comprehensive technical understanding than any individual document considered in isolation.
The purpose of this investigation was to evaluate the available environmental documentation within the context of accepted scientific and engineering practices while maintaining an objective, multidisciplinary approach. Particular emphasis was placed on understanding the methods used to characterize petroleum contamination, delineate environmental conditions, and document investigation activities. Rather than relying upon isolated findings, the investigation considered the available materials as an integrated body of technical information to evaluate the completeness, consistency, and technical reliability of the environmental record.
Chemicals of Concern
The investigation considered petroleum hydrocarbons and related constituents commonly associated with releases from underground storage systems. Petroleum products are complex mixtures composed of numerous hydrocarbon compounds that exhibit differing physical and chemical properties influencing their environmental behavior following a release. Once introduced into the subsurface, these compounds may partition among soil, groundwater, soil vapor, and the atmosphere depending upon site-specific hydrogeologic conditions and the characteristics of the released product.
Evaluation of petroleum contamination requires consideration of processes including dissolution, volatilization, sorption, biodegradation, and groundwater transport. These processes influence the distribution of contaminants over time and play an important role in understanding environmental conditions, designing investigation strategies, and evaluating potential exposure pathways. Petroleum hydrocarbons may also weather following release, resulting in changes to contaminant composition that can influence both environmental sampling results and long-term site characterization.
Published scientific literature and regulatory guidance concerning petroleum contamination, groundwater migration, environmental investigation methodologies, and human exposure pathways were reviewed to provide technical context for the environmental documentation evaluated during this investigation. Consideration was also given to the role of hydrogeologic conditions, groundwater flow, and subsurface heterogeneity in influencing contaminant migration and environmental characterization.
Methods
The investigation was conducted using established principles of environmental forensics, hydrogeology, environmental engineering, contaminant fate and transport analysis, historical records reconstruction, and geospatial evaluation. The available materials were reviewed collectively rather than independently to develop a comprehensive understanding of the environmental documentation and the technical approaches reflected within the historical record.
The review incorporated environmental investigation reports, engineering documentation, regulatory records, groundwater monitoring information, geospatial mapping products, technical memoranda, and supporting environmental data. Particular attention was given to understanding the progression of environmental investigations, the relationship between successive technical documents, and the consistency of the available information across multiple independent sources.
Environmental forensic investigations involving subsurface contamination frequently require evaluation of conceptual site models, groundwater characterization techniques, monitoring strategies, contaminant delineation methods, and accepted hydrogeologic principles. Accordingly, the investigation considered the available documentation within the broader framework of accepted environmental engineering practice rather than focusing on any individual analytical result or technical conclusion.
Where appropriate, geospatial information and environmental mapping were reviewed to understand the presentation of environmental data and the methods used to characterize subsurface conditions. The evaluation emphasized the integration of environmental records, engineering documentation, regulatory information, and scientific literature to provide a technically supported understanding of the investigation process while avoiding reliance on any single category of documentation.
Results
The reviewed materials constitute a comprehensive collection of environmental records, engineering documentation, regulatory correspondence, groundwater investigation materials, technical mapping products, and supporting environmental information prepared during environmental assessment activities. Collectively, these records document the progression of environmental investigation efforts and demonstrate the multidisciplinary nature of petroleum site characterization.
Evaluation of the available documentation illustrates the importance of integrating environmental sampling information, hydrogeologic interpretation, engineering analyses, and regulatory documentation when assessing subsurface petroleum contamination. Each category of information contributes unique technical context, and consideration of these materials collectively provides a more reliable understanding of historical environmental conditions than evaluation of isolated records.
The investigation further demonstrates that environmental forensic evaluations benefit from a systematic review of historical documentation prepared over multiple stages of site assessment. Integration of technical reports, environmental records, geospatial analyses, and supporting engineering information provides a comprehensive framework for evaluating the technical basis of environmental investigations while maintaining consistency with accepted environmental engineering and hydrogeologic practices.
Throughout the review, the available documentation was evaluated for technical consistency, completeness, and its usefulness in reconstructing historical environmental conditions. The investigation focused on understanding the methodologies reflected within the available records rather than relying upon individual findings or isolated technical observations.
Conclusions
The available environmental documentation provides a substantial technical foundation for evaluating historical petroleum contamination investigations using accepted principles of environmental forensics, hydrogeology, and environmental engineering.
Comprehensive environmental forensic investigations require integration of multiple independent categories of environmental information, including regulatory documentation, engineering reports, environmental sampling records, geospatial information, and historical technical materials. Considered collectively, these records provide a technically appropriate framework for understanding environmental investigation methodologies and evaluating the progression of site characterization activities.
This investigation demonstrates the value of multidisciplinary review in assessing historical environmental documentation while maintaining an objective scientific approach grounded in accepted environmental engineering, hydrogeologic, and contaminant fate and transport principles.
This investigation was conducted under the direction of Dr. Paul Rosenfeld, an environmental scientist and environmental forensic expert with experience in environmental contamination assessment, groundwater and soil contamination, contaminant fate and transport, hydrogeologic evaluation, historical site reconstruction, exposure assessment, regulatory review, and technical causation analysis. Through RoseyFields LLC, Dr. Rosenfeld provides environmental forensic investigations, contaminant source evaluations, groundwater and soil contamination assessments, historical records analysis, environmental compliance evaluations, hydrogeologic reviews, and expert consulting services involving complex environmental contamination and historical industrial operations.
References
Agency for Toxic Substances and Disease Registry (ATSDR). Toxicological Profile for Gasoline.
American Petroleum Institute (API). Publications concerning petroleum hydrogeology, leaking underground storage tanks, and site characterization methodologies.
Illinois Environmental Protection Agency (IEPA). Guidance relating to leaking underground storage tank investigations, corrective action, groundwater remediation, and environmental site assessment.
Interstate Technology & Regulatory Council (ITRC). Guidance concerning petroleum vapor intrusion, subsurface investigation, and environmental site characterization.
United States Environmental Protection Agency (U.S. EPA). Guidance concerning leaking underground storage tanks, petroleum-contaminated sites, groundwater investigations, and corrective action.
Published scientific literature concerning petroleum hydrogeology, contaminant fate and transport, environmental forensics, groundwater characterization, and environmental site investigation methodologies.
Technical reports, environmental investigation records, groundwater mapping, engineering documentation, geospatial analyses, and supporting materials reviewed during this investigation.