(Los Angeles, CA) An owner of an industrial building was trying to sell his property, but because a prospective buyer had learned of a potential vapor intrusion, he was offering the owner $2M less than the asking price. The tenant was a furniture manufacturer.
After one day of VaporSafe™ continuous monitoring, indoor spatial and temporal concentration patterns suggested that an indoor source might be the culprit. For instance, TCE concentrations were only elevated during working hours and only in areas where personnel were working. The net result is that with only a few field days, the occupants (many of whom were young women) were protected from exposure risks, the mystery (which prevailed following several rounds of conventional assessment) were resolved, and the seller received an offer for the full asking price.
Lesson: Continuous monitoring can quickly and accurately identify sources of elevated concentrations. For real property transactions, time is critical, and as such, a few days of monitoring can help expedite the transaction.