Tripp Fischer, P.G.

Former Macon Naval Ordnance Plant Superfund Site, Macon, Georgia — Support PRP group consultants on technical issues, geochemistry, and conceptual site model development. Review work plans, progress reports, and overall strategy and budgets.

Armstrong World Industries OU-2 Superfund Site, Macon, Georgia — Support PRP group consultants on technical issues, geochemistry, and conceptual site model development. Review work plans, progress reports, and overall strategy and budgets. Assess risk from historical landfills using incremental sampling, floodplain analysis, and fish impact evaluations.

JFD Channel Masters Superfund Site, Oxford, North Carolina — Advise the PRP on a chlorinated solvent site that once was a former electronics manufacturing facility and is currently undergoing pump and treat remediation. Work includes the evaluation of remediation data, cost forecasting, and technical oversight.

Conceptual Site Model Development for Chemical Leaman Tank Lines, Inc. Bridgeport Superfund Site, Bridgeport, New Jersey — Developed spatial contaminant contouring of multiple aquifers within a 34-acre project. Optimized sampling strategies to evaluate the effectiveness of a pump and treat remediation system. Developed conceptual site model reports for EPA reporting.

Third-Party Review of CERCLA Removal Actions and Risk Assessment, West Virginia — Evaluated and opined on conditions and the soundness of the Hazard Ranking System (HRS) scoring for an NPL site. Work included a review of a multidecadal history of EPA removal actions and risk assessments at a riverine PCB remediation site. In addition, evaluated PCB and PCDD/PCDF data in multiple environmental media and reviewed PCB biomarker data for legal counsel.

CERCLA Litigation – Sediment Sampling Support, Camden County, New Jersey — Provided sediment sampling support using watercraft to assess impacts to sediments from a CERCLA site. Work was part of a forensic assessment analyzing depositional environments and chemical compound ratios to make claim to contaminant sources.

Human Health Risk Assessment for TPH in Soils, Stanton, Delaware — Evaluated soil chemistry data, soil gas data, and groundwater data to assess human health risk for the reuse of soils on a large industrial redevelopment project.

Assessment and Remediation of Former Auto Manufacturing Facility, Newark, Delaware — Designed, installed, and operated a large soil vapor extraction and air sparging system to remediate solvents from soil and groundwater in the location of a former paint shop. The project was intended to facilitate the development of a large corporate headquarters, and it was completed within the 5-year timeline and on budget.

HUD Redevelopment, Newport News, Virginia — Performed site characterization ,including a complex vapor intrusion assessment and human health risk assessment, to comply with  Housing and Urban Development (HUD) funding requirements. Guided the developer/client through the environmental requirements for assessing financial and environmental liabilities. Performed extensive reporting for both the regulatory agencies as well as the federal funding mechanisms and concluded with a comfort letter acquisition.

Contaminated Soil Management for Redevelopment, Washington, DC — Assessed soils for human health exposure and managed the segregation and disposal of 40,000 yd³ of soils (3,000 trucks) to multiple treatment locations for large mixed-use development in northeast Washington, DC. The segregation plan and in-field sampling strategy resulted in the client saving tens of thousands of dollars in disposal costs and kept the project on schedule.

Assessment and Remediation of Impacts to Navigable Waterways Under the Oil Pollution Act, Newark and Millsboro, Delaware — Served as project lead for two petroleum releases that impacted navigable waterways, one of which included a heating oil surface release to a creek. Work included assessing, measuring, and remediating dissolved-phase contaminants discharging into the Indian River in Millsboro, Delaware. Served as the project lead for a state-lead site and coordinated cleanup with oversight by the U.S. Coast Guard, EPA, and state regulators.

LNAPL Assessment and Management, South Philadelphia, Pennsylvania — At an industrial site, performed an LNAPL assessment, which included fingerprinting, age-dating, mobility analysis, and typing to demonstrate historical conditions, thereby relieving the client of responsibility for cleanup. Successfully negotiated the property transaction despite complex environmental issues.

RCRA 2020 Initiative Site Closure in Newark, Delaware — Performed site assessment activities, including analyses of groundwater, soil, and soil gas. Performed vapor intrusion modeling and a human health risk assessment. Developed and implemented corrective actions culminating with an environmental covenant with activity and use limitations for site closure.

Evaluation of Remedial Strategy for Superfund Site, Hamilton, New Jersey — Evaluated soil, groundwater, and remediation system data related to a Superfund site. Opined that, under current conditions, remediation would be ineffective in the long term and that the client’s property would not be suitable for redevelopment at any time in the foreseeable future.

Due Diligence, Philadelphia, Pennsylvania — Supported a legal team in a lawsuit claiming losses due to improper environmental due diligence. The losses were for undoing extensive renovations to an apartment building to address an unfounded condition during a Phase I assessment.

Litigation and Technical Support, Wastewater Spray Irrigation System, Bucks County, Pennsylvania — Compared soil and groundwater chemistry to evaluate the effectiveness of treatment systems prior to applying effluent to spray field. Provided technical defense for claims of offsite impacts. Evaluated hydrology and health of vegetation within the spray field. Provided recommendations for improved treatment.

Mining Wastes, Southeastern, Pennsylvania — Provided an analysis and regulatory opinion regarding mining process water containing asbestos-containing material. Completed a review of complex data, including surface water and ambient air data, and supported the mining reclamation plan implementation.

Chlorinated Solvent Source Assessment, Washington, DC — Evaluated the source location and PCE impacts to indoor air for a large redevelopment project in Washington, DC.

Groundwater Fate and Transport Modeling of Tidally Influenced River, Millsboro, Delaware — Completed a multiphase program for the development and calibration of a large-scale finite difference groundwater flow and contaminant transport model for a tidally influenced remediation site. After initial model development, developed a plan for additional data collection to support additional calibration and validation requested by a regulatory agency. The final modeling product fulfilled the required work plan element and supported project closure.

Third-Party Review of Numerical Hydrogeologic Modeling Effort to Facilitate Redevelopment Projects, Wilmington, Delaware — Acted as a member of a multiagency award winning team that was involved with redeveloping the Wilmington waterfront. Reviewed several years’ worth of hydrogeologic data and supported a large numerical modeling effort to assess the effects of historical petroleum and chemical releases on the Christina River. This region included an area complicated by a large combined sewer overflow.

Finite Difference Model to Measure Groundwater Contaminant Discharge into Surface Water, Camden, Delaware — Developed a multilayer U.S. Geological Survey MODFLOW finite difference model with multiple sinks and streams to measure the potential discharge of MTBE and benzene to sensitive waterways. Used a groundwater reactive transport model (RT3D) for contaminant transport simulation.

Numerical Modeling Well-Head Protection Analyses, Delaware — Supported an integrated program for assessing potential contaminant sources for source water and well-head protection areas throughout Delaware. Incorporated risk analysis and analytical and numerical modeling.

NAPL Mobility Modeling for Surcharged Soil, Wilmington, Delaware — Complied decades of data, and information from a recent geotechnical analysis, into a predictive site conceptual model to evaluate the potential impact of several feet of soil surcharge on NAPL mobility. The soil surcharge was being placed to elevate riverfront properties for the purpose of redevelopment including road construction, utility upgrades, and mixed use. Conducted NAPL bail-down tests, NAPL transmissivity analyses, product characteristic testing, and NAPL modeling to analyze the impacts to NAPL mobility once the soil was surcharged in the area. Conducted NAPL volume estimates, saturations profiles, and mobility analyses.

Metals Analysis and Surface Drainage at Municipal Golf Course, Wilmington, Delaware — Performed data analysis for metals in soils at a golf course planned for residential use. Analysis involved determining which metals were likely native to the soils versus which may be due to historical applications of chemicals by evaluating data patterns, including topographic drainage patterns, and application procedures.

Forensic Study on Oil Discharges Originating from Seeps Discharging into Pristine Waterway, Baltimore, Maryland — Analyzed fingerprint analyses and other forensic data on multiple petroleum-based (hydraulic oil and heating oil) products to determine source locations of petroleum observed in natural seeps discharging along a pristine waterway. Performed toxicity studies on organisms for ecological risk. Developed and implemented the remedy.

Surface Drainage Assessment of Wastewater Spray Irrigation Field, Newark, Delaware — Using topographic surveys, LIDAR data, and spray head distribution mapping, evaluated application rate data for large spray irrigation fields and modeled surficial flow to evaluate drainage patterns. Provided a report for corrective actions and operational recommendations.

PCB Remediation, Wilmington, Delaware — Designed and conducted a large-scale PCB congener assessment and excavation in Wilmington as part of an EPA self-implementing cleanup of hazardous waste.

Regional PCB Pollution Minimization Plan Study, New Castle, Delaware — Coled an effort to identify sources of PCBs within the service area of a county sanitary sewer network. This work was conducted as part of a pollution minimization plan associated with a municipal NPDES permit and produced a geodatabase to support further source trackback efforts.

Development of International Standard Guides for Sediment Corrective Action, Global — Served as project lead for the development of 12 international standards on sediment corrective action through ASTM International. Topics for the guides included long term monitoring, background concentration calculation, field assessment techniques, risk assessment and NAPL characterization, and other risk-based corrective action processes.

Development of LNAPL Remedial Technologies Guidance, ITRC — Led a team in the development of ITRC’s groundbreaking LNAPL remediation documents: Evaluating Source Zone Depletion at Sites with LNAPL (2009) and Evaluating LNAPL Remedial Technologies for Achieving Project Goals (2009).

PFAS Assessment of Various Firefighting Training Facilities, Pennsylvania — Performed site assessments to measure various PFAS compounds in soils. Activities included review of historical operations, identification of potential sampling locations, preparation of data quality assurance plans, coordination with laboratories, sampling, and reporting.

PFAS Assessment of Biosolids Disposal Sites and Wastewater Treatment Systems, Confidential Location — Supported a study of PFAS in biosolids and wastewater, with the goal of evaluating the occurrence of a PFAS compounds, including legacy PFAS precursors, in biosolids, soils, and groundwater. Evaluated concentrations of PFAS compounds in domestic septage and municipal wastewater.

PFOS and PFOA Analytical Modeling for Regulatory Compliance, Philadelphia, Pennsylvania — Evaluated data on PFAS compounds in groundwater at an industrial site. The site was targeted for redevelopment and contamination was discovered during due diligence for property transfer. Activities included soil and groundwater sampling, source estimation, and analytical Domenico modeling for regulatory reporting.

Regulatory Support on PFAS Air Emissions, Confidential Location — Researched national best practices in several areas of PFAS management. This research included an extensive review of published literature as well as solicitation of input from state and federal regulators. Findings were summarized within a series of technical memoranda covering 1) definitions of PFAS used within various regulatory programs, 2) current understanding of PFAS toxicity through the inhalation pathway, 3) read-across methodologies for estimating PFAS toxicity, 4) methodologies used for modeling of PFAS atmospheric transport and deposition, and 5) destruction efficiencies documented for thermal treatment methods for PFAS air emissions.