WATERBURY, Conn. (AP) _ Waterbury school officials say a cleanup of potentially harmful chemicals in one of its elementary schools has left the building safe and ready for students as they returned to classes this week.

The Republican-American of Waterbury reports  that the cleanup was finished recently at the 45-year-old Carrington Elementary School, which will be torn down in a few years when a new school is built nearby.

The $50,000 cleanup project this summer was launched after consultants found problematic levels of PCBs, or polychlorinated biphenyls, in lighting fixtures, window and door caulking and other areas.

The chemicals were once widely used in construction, but are no longer manufactured because they can build up in the bodies of those exposed to high levels and cause health problems.

Waterbury schools started classes Thursday.

     (Copyright 2011 by The Associated Press.  All Rights Reserved.)


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