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The groundwater in the area is contaminated with harmful chemicals including trichloroethylene and perchloroethylene.

Perchloroethylene, or PCE, is a cleaning solvent that has been linked to several types of cancer.

Together, they focused on an attractive target, the commonly used degreasing and dry-cleaning agent perc, or perchloroethylene as chemists call it, which is non-harmful and produced in large quantities around the world.

The agency moved to ban asbestos last year and has also proposed banning methylene chloride, perchloroethylene and carbon tetrachloride.

That includes the likely next up, perchloroethylene, a solvent used for cleaning and degreasing, and carbon tetrachloride, another solvent that is commonly used to produce other chemicals such as refrigerants.