Would a comprehensive site assessment and better data with multiple technology integration make a...
Would a comprehensive site assessment and better data with multiple technology integration make a difference in your overall scope? Before you answer that question, think about whether or not having better, more accurate, and real-time information would motivate you to change your investigation technique on your next project. Are you actually interested in having data that accurately depicts the plume, delineates your source area, and multiple lines of evidence on your subsurface contamination? Or, would you rather “drill blind” and continue to sample areas where you think there may be contamination and install monitoring wells at the wrong depth and location incurring additional costs and time?
If having better data would actually change the way you would execute your project, design a remediation plan, or install monitoring wells, please read on. If you disagree, you may also continue to read, but the thoughts below may conflict with your perspective. Just saying, we warned you.
Data which is collected with advanced direct sensing tools (such as the Membrane Interface Probe (MIP), Laser Induced Fluorescence (LIF), or Hydraulic Profiling Tool (HPT)) provide a greater level of detail for characterizing the local site geology, a more in depth understanding of the hydrology, and deeper insight into the contaminant chemistry of your site. Wouldn’t all of this allow you to make more informed decisions?
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:
- Membrane Interface Probe (MIP) to characterize distribution of volatile organic compounds (VOCs) in discrete hydrologic units and soil stratigraphy at offsite locations;
- Direct-sensing geophysical tools rather than groundwater and soil sampling for initial screening; and
- 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.
Article originally featured in the Probing Times, the official newsletter of Geoprobe Systems® Fall 2009 Issue
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.