Friday, February 10, 2012

EPA Releases Final Health Assessment for Tetrachloroethylene (PERC)

On February 10, 2012, the U.S. Environmental Protection Agency (EPA) posted the agency’s final toxicological review of tetrachloroethylene. Tetrachloroethylene – also known as PERC, or PCE – is a solvent widely used in the dry cleaning industry. The review characterizes PERC as a “likely human carcinogen” and provides estimates for both cancer and non-cancer effects of exposure to the chemical. EPA's new calculated cancer risks for PCE are lower than the current values used by EPA, while non-cancer risks are higher by an order of magnitude or more.  Thus, risk-based screening levels based on EPA's newly-calculated cancer risks may increase, resulting in less stringent cleanup standards at PCE-contaminated sites. 

Many states, including California, already have stricter risk-based cleanup standards for PCE, and will not be immediately affected by the new federal standards.  The new standard will be used to develop a revised Maximum Contaminant Level (MCL, the federal drinking water standard) for PCE, but it is too early to predict whether that standard will be lower than the current MCL.

-Chris Jensen and Morgan Gilhuly


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Anti Money Laundering said...

Our environment, the world in which we live and work, is a mirror of our attitudes and expectations.

riverside  contractors said...

then it is time to make this substance banned or even just strictly regulated.

snoring solutions said...

the this should be marked as illegal or not safe for use.