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Environmental Modeling
Northgate's expertise includes subsurface chemical fate and transport processes to develop appropriate cleanup goals and design cost-effective remediation programs. Northgate offers a broad range of Environmental Modeling capabilities to aid in the interpretation and understanding of environmental conditions, such as:
- Watershed Modeling
- Chemical Fate and Transport Modeling
- Evaluation of Plume Migration and Containment
- Forensic Analysis of Commingled Plumes
- Design of Extraction Well Networks
- Evaluation of Vadose-Zone Chemical Leaching
- Three-Dimensional Contouring and Surface Modeling
- Soil Vapor Modeling
- Air Dispersion Modeling
Experience
Northgate's environmental modeling team has developed site-specific, risk-based cleanup levels that are protective of human health while achieving significant savings in remediation costs. Northgate's modeling team consists of experienced hydrogeologists, geologists, and engineers. Our team designs and conducts field investigations and analyzes and interprets real-world data. Examples of our modeling projects include:
- Watershed and Sediment Transport Analysis of Asbestos-Waste Mill Tailings
- Predictive Migration Modeling of Solvent Releases
- Cut and Fill Balance for Excavation and Grading
- Risk-Based Corrective Action Evaluation at Fuel Leak Sites
Case Study
Northgate staff used chemical transport modeling to evaluate the migration of chemicals from soil to groundwater through a 100-foot vadose zone with two perched groundwater zones. To aid in the design of the groundwater extraction system, groundwater modeling was conducted to assess the groundwater flow regime in three aquifers and to evaluate groundwater containment. Final remediation included groundwater extraction from two aquifer zones at depths to 155 feet. By optimizing the system, we reduced monitoring requirements and significantly lowered project costs. Northgate staff used groundwater modeling to assess treated effluent reinjection and the effect of a recharge on the existing plume configuration. Geochemical modeling was also conducted to assess the necessity of further treatment prior to reinjection of effluent to reduce the potential for injection well fouling.
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Vadose-Zone Transport Modeling, U.S. EPA Superfund Site
Santa Clara County, CA
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