Benzene - Immune system damage. Genetic damage. Blood disorders, including anemia and excessive bleeding. Increased incidence of leukemia.
Diesel particulates - Chronic respiratory effects. Lung cancer.
1,3-Butadiene - Increase in cardiovascular diseases. Effects on the central nervous system. Eye, nose and throat irritation. Cancer.
Acetaldehyde - Cancer.
Formaldehyde - Chronic eye, nose and throat irritation. Increased incidence of menstrual disorders and pregnancy problems. Lung and nasal cancer.
Source: Oregon Department of Environmental Quality