Air quality testing began Saturday at Monessen City School District’s middle/high school after discoveries of “abnormalities” in the building’s walls. Several issues arose while conducting routine maintenance at the district’s facilities ahead of the scheduled start of school Aug. 25, according to Superintendent Dr. Robert Motte. Several similar abnormalities were discovered behind walls in restroom areas, and the same precautionary measures were taken. The air quality testing will continue through today, with the school remaining closed during that time. Motte said the abnormality identified by district staff is a “localized environmental concern,” and said they cannot identify what it is until testing is complete.