JLC ??SEPTEMBER 1991 According to a recent statement written by Gerard Scannell, assistant secretary of the Occupational and Safety Health Administration (OSHA), fiberglass insulation now requires labels stating that the material causes lung cancer in humans. OSHA already requires material safety data sheets for fiberglass insulation. These sheets merely say fiberglass wool is classified as a possible cause of cancer in animals and recommend that workers avoid contact and wear respirators — a less serious warning than that specified in Scannell's statement. Scannell's statement, written in a letter to Richard Munson, president of an association called Victims of Fiberglass, says there is "positive human evidence, based on one valid study…indicating [that fiberglass has] carcinogenic effects in humans." Under OSHA's Hazard Communication Standard, this is grounds for requiring all fiberglass insulation manufacturers to include warning labels