| Cobalt | 281.56 |
| Chromium | 104.70 |
| Chromium compounds (except for chromite ore mined in the Transvaal Region of South Africa and the unreacted ore component of the chromite ore processing residue (COPR). COPR is the solid waste remaining after aqueous extraction of oxidized chromite ore that has been combined with soda ash and kiln roasted at approximately 2,000 F.) | 48.96 |
| Trichloroethylene | 18.78 |
| Formaldehyde | 9.98 |
| Nickel | 8.97 |
| Nickel compounds | 8.82 |
| Chloroform | 3.67 |
| Diisocyanates | 3.22 |
| Cadmium compounds | 3.11 |
| Benzene | 1.98 |
| Dichloromethane (Methylene chloride) | 0.78 |
| Toluene diisocyanate (mixed isomers) | 0.67 |
| Polycyclic aromatic compounds | 0.44 |
| Copper | 0.33 |
| Chlorine | 0.26 |
| Ethylbenzene | 0.14 |
| Xylene (mixed isomers) | 0.12 |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.06 |
| n-Hexane (Hexane) | 0.06 |
| Naphthalene | 0.04 |
| Lead | 0.03 |
| Certain glycol ethers | 0.02 |
| Phenol | 0.02 |
| Antimony compounds | 0.02 |
| Lead compounds | 0.02 |
| Hydrogen fluoride (Hydrofluoric acid) | 0.02 |
| Ammonia (includes anhydrous ammonia and aqueous ammonia from water dissociable ammonium salts and other sources; 10 percent of total aqueous ammonia is reportable under this listing) | 0.01 |
| Triethylamine | 0.01 |
| Toluene | 0.01 |
| Acetonitrile | 0.01 |
| Nitric acid | 0.01 |
| Zinc compounds | 0.01 |
| Butyl acrylate | 0.01 |
| Manganese | 0.01 |
| Maleic anhydride | 0.00 |
| Cyanide compounds | 0.00 |
| Silver compounds | 0.00 |
| 1,2,4-Trimethylbenzene | 0.00 |
| Propylene oxide | 0.00 |
| Methanol | 0.00 |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.00 |
| Acrylic acid | 0.00 |
| Toluene-2,4-diisocyanate | 0.00 |
| Copper compounds (this category does not include copper phthalocyanine compounds that are substituted with only hydrogen, and/or chlorine, and/or bromine.) | 0.00 |
| Aluminum (fume or dust) | 0.00 |
| N,N-Dimethylformamide | 0.00 |
| Methyl methacrylate | 0.00 |
| Styrene | 0.00 |
| Zinc (fume or dust) | 0.00 |
| Vinyl acetate | 0.00 |
| Ethylene glycol | 0.00 |
| Mercury | 0.00 |
| Methyl isobutyl ketone | 0.00 |
| Cyclohexane | 0.00 |
| Benzo[g,h,i]perylene | 0.00 |
| n-Butyl alcohol (1-Butanol) | 0.00 |
| Silver | 0.00 |
| Ethyl acrylate | 0.00 |
| Cumene | 0.00 |
| tert-Butyl alcohol (tert-Butanol) | 0.00 |
| Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 0.00 |
| Benzoyl peroxide | 0.00 |
| Di(2-ethylhexyl) phthalate | 0.00 |
| N-Methyl-2-pyrrolidone | 0.00 |
| Nonylphenol Ethoxylates | 0.00 |
