Blog & Recent Projects

Join us this week at the 37th AEHS Annual International Conference

Posted by John Sohl on Oct 18, 2021 6:30:00 AM

Join us for the premier 37th Annual International Conference on Soils, Sediments, Water, and Energy kicking off this Monday morning at 10:00 a.m. Eastern. 

As a virtual conference, you have the opportunity to check in at times convenient for you without the challenges of travel and leaving your desk. There is a full lineup of excellent speakers on current topics of interest including emerging contaminants, sustainable solutions, environmental justice, and offshore wind.  Continuing education credits are available for maintaining your certifications.

For a special treat, join us on Thursday at 1:00 p.m. Eastern when COLUMBIA Technologies sponsors industry leaders providing their perspective on the State-of-Science of high-resolution technologies and protocols including: 

  • Murray Einarson (Haley & Aldrich) - The Surprisingly Long History of High-Resolution Site Characterization (HRSC) and a look to the Future
  • Beth Parker (G360 Institute for Groundwater Research) - Novel High-Resolution Site Characterization Methods to Inform Remediation at Contaminated Fractured Rock Sites
  • Joe Guarnaccia (BASF) - A Mass-Flux Approach to Designing a Permeable Reactive Barrier Well Array

Later on Thursday from 5:00 to 7:00 p.m., we will also present Workshop 08, a 2-hr review of Building the Business Case for Combining HRSC and Sustainable Remediation Technologies to Reduce the Life-Cycle Cost for UST Site Closure.  

Register here for these and other excellent presentations

I hope to see you there!


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Tags: Direct Sensing, High Resolution Site Characterization (HRSC), LNAPL, MIP, Site Characterization, UST, Climate Change, Sustainability, AEHS

The 7 Biggest Myths of Direct Sensing (Part II)

Posted by admin on Oct 3, 2012 1:07:12 PM

We hope you enjoyed our last blog post, The 7 Myths of Direct Sensing (Part I) outlining the three basic assumptions or principles we have in mind when deploying high resolution direct sensing tools, defining high resolution and direct sensing tools, and disclosing the first three myths related to site characterization projects.

Below are four additional myths related to detection levels, remediation programs, cost of direct sensing, and the need for real time data with the corresponding truths.

Myth 4: The detection levels of direct sensing tools like the Membrane Interface Probe (MIP) are not low enough

If you’re going off the basis that the contaminant levels at your site are too low for direct sensing tools, you’re probably should ask yourself do I really only have 10 ppb and if so, why do I still have 10 ppb? Direct sensing tools for contaminant profiling are first and foremost source area characterization tools.

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Tags: Direct Sensing, High Resolution Site Characterization (HRSC), Hydraulic Profiling Tool (HPT), Membrane Interface Probe-Hydraulic Profiling Tool, Membrane Interface Probe (MIP), News, Site Characterization

Five Steps to Developing Weighted Lines of Evidence During Site Characterization

Posted by John Sohl on May 30, 2012 12:39:43 PM

One of the most critical points to remember when developing a site closure work plan is that it simply costs too much to assess, remediate, and make decisions on information that is incomplete, inaccurate, and too late. Traditional approaches to characterizing subsurface conditions by drilling, soil sampling, and monitoring wells screened over large intervals are too incomplete to accurately deal with site heteregoneity.

Therefore, a high resolution site characterization approach is a more attractive option as it enables projects to move forward with remediation focused activities such as corrective action, free product recovery efforts, and site closure.

Let’s face it, the heterogeneity geology of a site is going to impact the migration of subsurface contamination opposed to the age old myth that it always follows the direction of groundwater. Introduction of the Hydraulic Profiling Tool (HPT) for site investigation and remediation efforts supports contaminant mapping activities to provide a greater understanding of subsurface conditions. By measuring direct pressure response, HPT develops weighted lines of evidence indicating the tight (or loose) grains and low (or high) flow zones in order to determine the migration pathways, remediation injection regions, and placements for monitoring wells. With an integrated Soil Electrical Conductivity (EC) array this tool also defines zones of lower conductivity which allows for the movement of contaminants into the subsurface.

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Tags: Hydraulic Profiling Tool (HPT), LNAPL, Membrane Interface Probe (MIP), News, Site Characterization