An aerial view of the Changzhou Foreign Languages School in East China's Jiangsu province. The school is located 100 meters from reportedly polluted former site of three chemical plants across the road. Nearly 500 students have allegedly been diagnosed with health problems ranging from dermatitis to leukemia since the school moved to its current campus in September. [Photo/Xinhua]

A photo shot in 2008 shows three chemical plants located within 100 meters where the campus now stands. An independent environmental report found the site of the school was heavily polluted. It also discovered that the chlorobenzene in the underground water and soil was thousands times higher than the national standards. [Photo/Xinhua]

The school is operating normally with only few students on sick leave. It reportedly suspended class in January due after students fell ill. A news release from the Changzhou government reported by Xinhua News Agency on Monday insisted that the site had passed an environmental evaluation. The local environmental protection agency said their tests of the campus found nothing unusual. [Photo/chinanews.com]

Students attend class in the school. [Photo/chinanews.com]

Pungent odor is detected from the former plants site where soil remediation is underway since December. [Photo/chinanews.com]