EPA advises on PCBs in caulk.

In September 2009, the U.S. EPA issued a set of best practices and testing guidelines for building owners and school administrators to reduce exposure to PCBs found in caulk. PCB-laden caulk was used in buildings between 1950 and 1978, when the chemicals were phased out in the United States. The EPA also outlined research it will conduct over the next two years to help understand any health risks from PCBs in caulk; it is unclear whether or in what quantities PCBs in caulk migrate into air or dust. Findings from this research will guide the EPA in developing further recommendations to minimize exposures and safely remove the caulk. More information is available at http://www.epa.gov/pcbsincaulk/.