Among the substances were ethylene glycol monobutyl ether, ethylhexyl acrylate and isobutylene were also in the rail cars that were derailed, the list shows. However, once the controlled burn was complete, the only risk of coming in contact with the toxins was if they were embedded in the soil, which then had to be dug out, Kevin Crist, professor of chemical and biomolecular engineering and director of Ohio University’s Air Quality Center, told ABC News last week. Local schools and the library were screened on Sunday, according to the agency