Loading
Review of Case Materials
Reviews records, documents, testimony, data, and other relevant materials and consults with counsel regarding technical issues related to the matter.
Provide Expert Analysis
Applies specialized knowledge and experience to evaluate the technical or professional issues involved.
Form Expert Opinions
Develops independent, supportable opinions based on the available evidence and relevant standards.
Prepare Expert Reports
Showing Results 0 of 0
Delineation usually requires samples from enough locations and depths to show how contaminant concentrations change across the site. Soil borings, monitoring wells, groundwater elevations, laboratory results, geology, and historical source information can be combined to map horizontal and vertical distribution. EPA describes site characterization as the process of gathering physical, biological, and chemical information needed to define contamination, migration pathways, and potentially affected receptors.
A conceptual site model organizes the evidence into a working picture of the site. It can identify suspected source areas, contaminant distributions, soil and groundwater conditions, migration routes, exposure pathways, and potential receptors. The model should change as additional evidence is collected rather than remain fixed to the assumptions made at the beginning of an investigation. EPA uses conceptual site models to integrate these lines of evidence and guide characterization and cleanup decisions.
The analysis may compare concentrations at suspected source areas with upgradient, off-site, or other appropriate background locations while also considering geology, historical land use, naturally occurring substances, nearby facilities, and analytical patterns. Spatial trends matter. A substance detected at a property does not by itself establish that a particular operation caused the condition.
Subsurface materials influence how water and contaminants move. Permeable layers may provide migration pathways, while less permeable units can slow or redirect movement. Groundwater elevation measurements can also establish hydraulic gradients and likely flow directions. EPA site-characterization guidance specifically considers geology, groundwater depth and fluctuations, contaminant pathways, and plume behavior when investigating releases.
Environmental Engineering, +4
Manufacturing
Environmental Engineering, +4
Manufacturing
Prepares clear, well-supported expert reports outlining methodology, analysis, findings, and opinions.
Provide Deposition Testimony
Explains findings and opinions under oath and responds to questioning during deposition testimony.
Testify in Court
Presents specialized findings and opinions clearly to judges, juries, arbitrators, or other decision-makers.
Past operations can explain conditions that are no longer visible during a present-day inspection. Historical aerial imagery, facility layouts, tank or waste records, spill reports, permits, prior sampling, property-use records, and earlier investigations can identify former source areas and changes to the site. Comparing that history with the current contaminant distribution can help test whether the proposed source and migration timeline are technically consistent.
Environmental Engineering, +4
Government
Hydrology, +4
Oil and Gas