Practical Applications of 3D Conceptual Site Models (CSMs), Built from High Resolution Data Sets
High resolution site characterizations are quickly becoming standard practice in the consulting industry for the investigation of contaminated sites. They may involve the use of direct sensing tools, like a Membrane Interface Probe (MIP) or the collection of high-density soil and groundwater samples, however, these investigations all have one thing in common, they produce a lot of data. 3D CSMs are the solution to visualizing and understanding the massive amounts of data generated from high-resolution site investigations. These CSMs have aided projects by:
• Delineating the contamination or response in three dimensions;
• Identifying data gaps;
• Classifying how the contamination is distributed geologically; or
• Calculating the volume of contaminated soil or in-situ contaminant mass.
The 3D visuals have not only been influential in the investigation phase, but also in the design and implementation of the remedial solution. The presentation will focus on several case studies where the 3D CSM was an essential tool in the remedial strategy:
1) Optimization of an Electrical Resistance Heating System: Nearly 15,000 cubic yards of contaminated soil and an estimated 4,600 pounds of TCE was delineated using a 3D CSM. The 3D CSM was used to reduce the original design costs by over 1.1 million dollars.
2) Targeted Injection Plan: Data from a Membrane Interface Probe / Hydraulic Profiling Tool (MiHPT) was analyzed to both determine the extent of contamination and calculate how the contamination was distributed geologically. The analysis will be crucial in determining the locations to inject amendments, injection amounts, and pressures.
3) Strategizing LNAPL Remediation: Over 200,000 data points were collected using a TarGOST tool to identify the extent of contamination at a former Manufactured Gas Plant. The resulting 3D model determined several different zones of contamination with vastly different LNAPL signatures.