Residents have since complained of feeling ill and noted animals getting sick and fish dying in bodies of water.
Three days after the derailment on February 3, authorities burned vinyl chloride inside five tanker cars, which released hydrogen chloride and phosgene, the report said. The EPA says tests indicate the surrounding air and water are safe for residents.
Two Pennsylvania residents filed a federal lawsuit last Thursday against Norfolk Southern, calling for the railway to pay for medical screenings and care for residents living within a 30-mile radius of the derailment site in Ohio and Pennsylvania.