Formatted Title
The Digital Frontier: Data-Driven, Three-Dimensional (3-D) Conceptual Site Models (CSMs)
Background/Objectives
Following a remedial investigation (RI) conducted for the Naval Facilities Engineering Systems Command (NAVFAC) at a Department of the Navy installation (the Site), stakeholders proposed advancement to the feasibility study (FS). However, after evaluating the site data and potential remedial alternatives, data gaps were identified that needed to be addressed. Therefore, a sitewide three-dimensional (3-D) data visualization was prepared to refine the site conceptual site model (CSM) and potential data gaps to be addressed in a Pre-FS investigation to support screening, development, and evaluation of remedial alternatives.
The specific objectives of the 3-D data visualization data gap analysis were to:
- Refine the understanding of trichloroethene (TCE) isoconcentrations in soil and groundwater
- Identify areas where potential dense nonaqueous phase liquid (DNAPL) may be present laterally and vertically using 3-D data interpolations of laboratory soil analytical data in combination with membrane interface probe (MIP) data
- Understand the potential transport and migration pathways (if present) from unsaturated soil to the subsurface confining units and/or aquifers
- Estimate the proposed target treatment volume to aid in developing potential remedial alternatives in support of the FS
- Evaluate potential groundwater-to-surface-water discharge pathways
Approach/Activities
Existing site data were identified and processed into a comprehensive dataset suitable for 3D data visualization and analyses using Earth Volumetric Studio (EVS) software by C Tech Development Corporation (C Tech). Site data incorporated into the 3D data visualization included: topography, site geographic information system (GIS) features, imagery, monitoring well location/construction data, groundwater elevations, analytical data for soil, groundwater, and surface water, MIP data, and boring log lithological data. The comprehensive site dataset was loaded into C Tech’s EVS software to generate stratigraphic, topographic, and plume interpolations, primarily in 3-D, with associated two-dimensional (2-D) maps and cross-section views (where applicable).
In addition, an interactive 3-D CSM was published and hosted on Alluvialsm (a digital data delivery platform). The 3-D visualization integrated all data components listed above for a near infinite combination of views that were selectable, editable, and interactive by the end-user. Stakeholders (both internally and externally) were given secure access to this digital 3-D data visualization hosted on Alluvialsm in combination with traditional delivery methods (text, figures, tables, etc.), as part of the reporting and review process.
Results/Lessons Learned
This presentation will demonstrate the workflow, streamlined efficiencies, and deliverable mechanisms of this 3-D data visualization in the context of the Site data gap analysis and related CSM. In addition, an overview of the conclusions and recommendations drawn from the analysis will be presented. In short, data-driven, 3-D visualizations simplify complex, multi-dimensional datasets that are captured throughout the project lifecycle. They help to communicate tangible, actionable, data-driven insights, offering the broader audience conceptual understanding. Application of this type of digital, data-driven, 3-D CSM, can reduce project costs, expedite decision making, and help to communicate information to both internal and external stakeholders.