Do people who work in drycleaning shops need to worry about perc exposures?
Based on occupational studies, there is some concern for drycleaning workers because people who work in traditional drycleaning shops are expected to have the highest exposures to perc. This is because they spend a lot of time inside the shops where the perc air levels are usually higher than levels found outside the shops. There are many factors that influence perc air levels in drycleaning shops and each shop is unique. Perc evaporates quickly and can enter the air of drycleaning shops in many ways: • From poorly maintained machines; • Through equipment leaks; • From perc that is open to the air, such as when liquid solvent is being added to the machines or when there are open drums and tanks containing perc or perc waste materials; • From clothes that are not completely dry or improperly processed; and • From clothes being transferred from a washer to a dryer in older “transfer” machines that have separate washers and dryers. New drycleaning equipment, control technology, and cleani
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