Chemical:
1,3-Butadiene, 2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD), 4-Nitrobiphenyl, Acetaldehyde, Aniline, Arsenic (inorganic arsenic compounds), Benzene, Beryllium and beryllium compounds, Cadmium, Cadmium and cadmium compounds, Chromium (hexavalent compounds), Cobalt [II] oxide, Di(2-ethylhexyl)phthalate, Diesel engine exhaust, Formaldehyde (gas), Lead, Lead and lead compounds, Mercury, Mercury and mercury compounds, Methylmercury compounds, Nickel, Nickel compounds, Polychlorinated dibenzo-p-dioxins, Polychlorinated dibenzofurans, Silica, crystalline (airborne particles of respirable size), Toluene