The Department of Education says two classrooms at PS 36 in Annadale where elevated levels of PCB's had been detected now test well below Environmental Protection Agency standards.

The DOE says wipe and air samples show no concern after many parents kept their kids home Tuesday after news of the PCBs surfaced.

Elevated levels of PCBs, a chemical linked to cancer, were detected last week after a teacher complained about a leaking light fixture in her classroom.

Officials estimate more than 700 schools citywide could have the same problem since they were built before use of PCBs was banned in the 1970s.