Firefighters were called at about 10:20 a.m. Friday.
The entire building, including faculty, staff and approximately 400 kindergarten through 5th grade students, was evacuated as a precaution.
There was no immediate report of anyone being sickened or injured.
PGW crews were reportedly on the scene trying to pinpoint the source of the odor.
As of 11:30 a.m. there was no word what may have caused the odor.