November 6, 2007 - Polluted groundwater beneath a Billings neighborhood poses long-term risks to residents living above it, but the immediate risks can be mitigated fairly easily, according to Environmental Protection Agency officials.
The 140-acre underground plume southwest of downtown contains four "contaminants of concern," including PCE, known formally as perchloroethylene, a solvent used in dry cleaning and other industrial practices, according to an EPA health risk assessment of the site.
The biggest concern is that the pollutants in the contaminated groundwater are converting to vapor and migrating up through the soil and into homes, where they might be inhaled.
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