Modeling & Hydrogeology

SSP&A developed a groundwater flow model covering the western portion of the Washington Water Resources Inventory Area 1 in Whatcom County.

For nearly a decade, SSP&A assisted with the development and implementation of long-term management of contaminated groundwater at the Anaconda Copper Mine Site in Lyon County, Nevada.

SSP&A works with the Mississippi Department of Environmental Quality and the Federal Energy Regulatory Commission to manage monitoring oversight and long-term management of the Transco-Williams facility.

SSP&A was initially engaged to assess groundwater conditions and develop and apply models to design, evaluate, and optimize groundwater remedies for CERCLA operable units across the Hanford Site.

SSP&A was retained to develop a groundwater model to support a Category 3 Groundwater Permit to Take Water for Canada Silver Cobalt Works.

SSP&A was initially retained to provide expert review and evaluation of hydrologic, hydrogeologic, and geochemical conditions at the former Leviathan Mine Site, and to assess the sources of impacts of mining-related residues on groundwater and surface water.

For over 10 years SSP&A consulted to the NYSDEC spills department, evaluating and simulating the fate and remediation of fuel spills.

For over 10 years SSP&A consulted to the NYSDEC spills department, evaluating and simulating the fate and remediation of fuel spills at multiple sites.

The Hyde Park Landfill is a hazardous waste landfill where approximately 20,000 tons of chlorinated compounds (primarily DNAPLs) were disposed in a fractured rock setting.

Texture2Par facilitates the assignment of aquifer parameter values directly to IWFM and MODFLOW model input files on the basis of sediment texture data acquired from stratigraphic logs.

SSP&A has designed sampling and analysis plans to determine groundwater and basalt chemistry, performed geochemical reactive transport modeling to predict the types and consequences of chemical reactions during ASR operations, and identified mitigation measures in cases where chemical incompatibilities between recharge water and basalt have been identified.

Multiple Sites in EPA Region 5: Illinois, Indiana, Michigan, Minnesota, Ohio, and Wisconsin

SSP&A developed analyses to predict the evolution of the concentration of chloride at a compliance boundary downgradient from an existing landfill and proposed new landfill cells.

SSP&A was responsible for the local wellfield characterization for four communities including Cannington, Blackstock, Uxbridge, and Port Perry, in the Durham Region of Ontario, Canada.

ASR is a water resource management strategy used in central California to make use of a source water, such as spring snowmelt that flows in rivers and canals.

SSP&A was retained to estimate and depict the lateral extent and the volume of radiologically-impacted material (RIM) within Areas 1 and 2 of Operable Unit 1 (OU-1) at West Lake Landfill Site

SSP&A was retained to develop a groundwater transport model that would explicitly account for the long-term fate of arsenic and boron in aquifers underlying the Coronet Industries Alternative Site, located in Plant City, Florida.

To address concerns regarding groundwater/surface-water interactions and potential Rio Grande Project Supply impacts, SSP&A provided expert hydrogeologic support in the evaluation of the Tulla Resources application and developed possible strategies for offsetting any potential impacts.

SSP&A was retained by Sparton Technology, Inc., to assist in the development of a remedial plan, litigation support, and negotiations with federal, state, county and city regulatory authorities for its Former Coors Road facility in Albuquerque, New Mexico.

To assist the State in their management of water resources in the Carlsbad Basin, SSP&A developed a graphical user interface for evaluation of water rights transfer applications which integrates an existing superposition groundwater model and advanced applications of the Glover-Balmer and Theis equations for analysis of locations outside the active extents of the groundwater model.

SSP&A developed and calibrated a highly-detailed and refined historical groundwater flow model of the Lower Rio Grande Basin.

On behalf of the New Mexico Interstate Stream Commission (NMISC), SSP&A was asked to provide expert insight into the State’s effort to assess feasibility regarding potential Salt Basin groundwater development for interbasin transfer either to the Pecos or Lower Rio Grande Basins.

The USDOE Hanford Site transitioned over decades from a Manhattan Project mission to environmental assessment and cleanup. SSP&A was initially engaged to assess groundwater conditions and develop and apply models to design, evaluate, and optimize groundwater remedies for CERCLA operable units across the Hanford Site.

SSP&A was initially retained to evaluate the fate and transport of CrVI (from historical plating activities) and the effectiveness of a combined strategy of in-situ and ex-situ remedies.

SSP&A developed and applied a 3D groundwater flow and contaminant transport model for the OTIS/MMR as part of remediation efforts at the site, and was subsequently retained to undertake wide-ranging data analysis, reporting, and remedy evaluation and optimization tasks.

SSP&A was retained by the U.S. Environmental Protection Agency (EPA) Region 5 to evaluate groundwater conditions at the site and to collect environmental media to support the microcosm studies.

Translating the developing conceptual model, complete with the natural and man-made complexities described above, is a challenging task that is being undertaken jointly by S.S. Papadopulos & Associates, Inc. (SSP&A) together with GSI Water Solutions in collaboration with the GWMA.

SSP&A was retained to evaluate the locations, timing, and quantities of historical contaminant discharges to the Columbia River to support a potential Natural Resource Damage Assessment (NRDA) claim.