(Mid-Atlantic US) After years of evaluation with traditional methods at a very large industrial facility, TCE entry point locations remained elusive. Within a few hours after VaporSafe™ continuous monitoring began, spatial and temporal patterns revealed that highest concentrations were in the basement where two sumps were located. The consultant covered the sumps with visqueen and within a few hours VaporSafe™ confirmed a drop in indoor concentrations to safe levels. 

Lesson: Continuous monitoring rapidly responds to simple building modifications which can help pinpoint vapor entry locations.

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