Students were shifted to two other elementary schools, and some courses are taught in cafeterias or storage areas.
The lawsuit seeks compensatory and punitive damages. The plant had been cited with several environmental violations.
Terri Fitzpatrick, a spokeswoman for plastics maker Lanxess Corp., which previously owned the plant, says the company took steps to enhance environmental controls. The plant continues to operate under a joint agreement between Lanxess and Ineos Group.
