- simulation of contaminant flow and transport
- definition of regulatory boundaries and remediation goals
- identification of data gaps and guidance for additional data collection
- uncertainty analysis and assessment of present and future risk
- evaluation of remedial strategies and technologies
- design and optimization of remedial systems and monitoring networks
- analysis of contaminant sources to determine cleanup cost liability
- evaluation of chemical interaction of dissolved organic and inorganic constituents
One of the challenges of environmental impact investigations, and the subsequent development of an effective and efficient remedial strategy, is determining the validity of the conceptual site model. To help meet this challenge, INTERA is a leader in using groundwater flow and contaminant transport models to test the conceptual site model in a dynamic setting, provide insight for identifying critical data gaps in the current understanding of the site setting, serve as a quantitative basis for risk evaluations, anticipating foreseeable future conditions, and compare remedial and mitigation alternatives. Since our founding in 1974, the development and application of numerical models and other quantitative decision support tools have been core competencies of INTERA. In fact, under contracts with the United States Geological Survey and Sandia National Laboratories, we developed some of the earliest public domain groundwater flow and transport modeling simulators (e.g., SWIFT an d SWIFT-II) capable of treating variable fluid density, dual porosity (i.e., fractured media), and multi-chain radionuclide transport in 3-dimensional cartesian or 2-dimensional radial coordinates. In addition to the high-level technical expertise needed to develop new modeling codes and tools, our geoscientists and engineers routinely apply, and adapt to meet specific project requirements, many of the commonly used commercial codes (e.g., MODFLOW, GMS).
In keeping with our thorough approach to problem-solving, our analyses are often conducted in conjunction with other interpretive tools such as geostatistics and applied statistics. INTERA integrates modeling with GIS databases to focus data collection and with other visualization software packages (e.g., Leapfrog Hydro) to facilitate the communication of information and results to clients, regulators, and other project stakeholders. Our models also assist clients with emerging regulatory policies and guidance, including using risk-based corrective action, negotiating technical impracticability, evaluating monitored natural attenuation, and developing alternate concentration limits where appropriate.