LEWISTON, Maine (NEWS CENTER) – Students and teachers at Lewiston''s Longley School spent an extra day at home Monday, Nov. 13, as a contractor cleans up mold found in the school's office area.

Assistant Superintendent Shawn Chabot said a crew from Serve Pro spent Friday at the school and finished cleaning the office area Monday morning. Air quality testing is scheduled for Monday afternoon.

Chabot said the mold problem was discovered after he school's principal developed health problems, which prompted a search for mold. The problem, he said, is isolated in the office area of the building, and may have been related to an old window air conditioner that was used.

The air conditioner wasn't in sight Monday morning, and a school department maintainable worker was making what appeared to be modifications to the window area of the office.

Chabot said they had not found mold in any other parts of the building, and that this was the first instance of mold in Lewiston schools in his 13 years in the city school department.