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Should Site Assessments Be Conducted Through Traditional Sampling, Groundwater Monitoring Wells, or Direct Sensing Methods?

Posted by John Sohl on May 16, 2016 10:15:10 PM

 It is safe to say that 99% of all site assessments are either conducted through traditional sampling, groundwater monitoring wells, or direct sensing methods. As a leading site investigation partner to environmental consultants throughout North America and Hawaii, COLUMBIA Technologies specializes in soil and groundwater contamination assessments.

Since 1999, we have completed over 750 site assessments for some of the most discriminating clients including oil companies, government agencies, commercial real estate owners, developers, as well as architectural and engineering firms. Throughout all of our testing and experiences to date, we believe that using a comprehensive High Resolution Vertical Profiling approach seems to be the most cost-effective and accurate method to assess a contaminated site. This consists of direct sensing technologies to delineate the vertical and horizontal extent of the contamination to pinpoint the location. Once this information is known, following up with confirmation soil and groundwater samples would take place to validate the contaminant of concern.

The direct sensing technologies may cost more up front, however they assure that accurate information is being collected to move forward with designing remediation plans. In addition, our patented real-time data services platform, SmartData Solutions®, is able to produce high resolution visualizations through a secured website for online review of project data.

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Tags: Laser Induced Fluorescence, Membrane Interface Probe, News, SmartData Solutions®, High Resolution Site Characterization (HRSC)

Revised Characterization Plan Accelerates Petroleum Brownfield Cleanup and Redevelopment

Posted by John Sohl on Mar 31, 2011 11:32:35 AM

 Article originally featured in the Environmental Protection Agency (EPA) CLU-IN Technology News and Trends March 2011 Issue

Most recently, the March 2011 issue of Technology and Trends highlighted a project where COLUMBIA Technologies worked closely with the property owner, the Virginia Department of Environmental Quality (VA DEQ), and the City to address the site's environmental and economic issues.

Efforts to better delineate contamination and accelerate remediation of the former Fannon Petroleum Services site in Alexandria, VA, were initiated in the early 2000s as part of a plan to redevelop the site for residential use.

For this project, the VA DEQ initiated the Triad approach including the development of a conceptual site model and consensus on specific investigative methods and tools, with a focus on using:

  1. Membrane Interface Probe (MIP) to characterize distribution of volatile organic compounds (VOCs) in discrete hydrologic units and soil stratigraphy at offsite locations;
  2. Direct-sensing geophysical tools rather than groundwater and soil sampling for initial screening; and
  3. A dynamic work strategy to allow real-time decision making that could identify specific locations for direct-sensing locations as work proceeded.

Click the following link to read the full article, Revised Characterization Plan Accelerates Petroleum Brownfield Cleanup and Redevelopment.

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Tags: Direct Sensing, Membrane Interface Probe, MIP, Triad Approach, LNAPL, High Resolution Site Characterization (HRSC)

TCE Contamination Logged Using MIP with SmartData Solutions®

Posted by John Sohl on Sep 21, 2009 12:20:03 PM

Article originally featured in the Probing Times, the official newsletter of Geoprobe Systems® Fall 2009 Issue

 A warehousing facility for an equipment manufacturer had undergone several rounds of investigation and remediation to determine the extent of TCE contamination. The distribution of TCE on this several acre site in Los Angeles County, CA, was strongly controlled by thin-layer geology. And after more than a decade of investigating, the extent of the contamination was still not fully understood.

Long before the fieldwork began, Columbia Technologies, based in Baltimore, MD, worked closely with GeoTrans in Irvine, CA, the site consultant, to develop a scope of work that would allow Columbia Technologies to characterize the vertical distribution of TCE across the site in just a few days of fieldwork using the Membrane Interface Probe (MIP).

"Of critical importance," according to Lauren Steely, Columbia's West Coast Operations Manager, "was our ability to push the MIP system to a 70-ft. depth at one location while avoiding cross-contamination of a deep sand unit."

Lauren enlisted the assistance of Millennium Environmental in Anaheim, one of Columbia's southern California service partners, to provide a Geoprobe® 6600/PC111 and field team for the project. The Millennium team pushed the MIP logging system through a conductor casing to prevent shallow contaminated groundwater from impacting the deeper aquifer.

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Tags: COLUMBIA Technologies, Membrane Interface Probe, MIP, SmartData Solutions®, High Resolution Site Characterization (HRSC)