Schools Face a Potential PCBs Threat From Dated Lighting Fixtures

School administrators and maintenance personnel should take time to
inspect fluorescent lighting fixtures as some may have ballasts that
contain polychlorinated biphenyls (PCBs).

More…

[source: http://www.buildings.com/article-details/articleid/16721/title/schools-face-a-potential-pcbs-threat-from-dated-lighting-fixtures.aspx]