06/11/2026
Tetrachloroethylene, also known as perchloroethylene, or PERC, is a chlorinated solvent historically used in the dry cleaning industry 🚨
If you’re wondering WHY when a dry cleaning business is found during an Environmental Site Assessment (ESA) it poses a big concern, watch this video!
PERC is a DNAPL (dense non-aqueous phase liquid), so that means it doesn’t float along the water table but instead, it goes right through it and sinks down to a confining layer or hits bedrock (and then poses danger to the bedrock) ⛔️
We recently completed an ESA review where a very reputable and known company appeared to have missed a lot of the signs of a dry cleaning facility and instead the unit was identified as a laundromat only 🤯
We found containment systems like the ones shown in this video, an underground holding tank (often used for waste and regularly emptied), raised edges around the work area, specific insulated piping, and even the historic listing of the unit as a dry cleaner. While newer dry cleaning facilities exist (with green alternatives), it’s important to not ignore the signs of potential PERC use and do the research!! ⚠️
Watch this video prepared by Environment Canada back in the day…
https://share.google/gGhfMRyUFPCSt6TRI
drycleaning