September 28th, 2010
Article originally featured in the Probing Times, the official newsletter of Geoprobe Systems® Fall 2010 Issue
Article featured in the Fall 2010 issue of the Probing Times, the official newsletter of Geoprobe Systems®.
Dissolved phase TCE (trichloroethylene) was detected in the Millsboro, DE, water source during routine sampling of the community’s water supply wells, and was traced to nearby township wells. The TCE, which was banned from public use in the 1970s, was detected at levels greater than the U.S. EPA’s maximum contaminant level for public drinking water. Investigations completed by the Delaware Department of Natural Resources and Environmental Control – Site Investigation and Restoration Branch and by EA Engineering, in Sparks, MD, determined that the source of the TCE mass distribution was a former poultry vaccine manufacturing facility located less than 1,400 ft. from the public wells. TCE had been used as a heat transfer medium in a closed refrigeration system at the facility. Read the rest of this entry »
September 21st, 2009
Article originally featured in the Probing Times, the official newsletter of Geoprobe Systems® Fall 2009 Issue
Article featured in the Fall 2009 issue of the Probing Times, the official newsletter of Geoprobe Systems®.
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). Read the rest of this entry »