| Cobalt | 175.08 |
| Chromium | 49.07 |
| 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.) | 33.52 |
| Nickel | 5.42 |
| Cadmium compounds | 2.69 |
| Formaldehyde | 1.61 |
| Benzene | 1.25 |
| Chloroform | 0.83 |
| Toluene diisocyanate (mixed isomers) | 0.43 |
| Diisocyanates | 0.34 |
| Chlorine | 0.29 |
| Polycyclic aromatic compounds | 0.23 |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.10 |
| Copper | 0.06 |
| Xylene (mixed isomers) | 0.04 |
| Dichloromethane (Methylene chloride) | 0.04 |
| Lead | 0.03 |
| Naphthalene | 0.03 |
| Ethylbenzene | 0.02 |
| Lead compounds | 0.02 |
| Nitric acid | 0.02 |
| Certain glycol ethers | 0.01 |
| Manganese | 0.01 |
| 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 |
| Antimony compounds | 0.01 |
| Zinc compounds | 0.01 |
| Acetonitrile | 0.01 |
| n-Hexane (Hexane) | 0.00 |
| Cyanide compounds | 0.00 |
| Phenol | 0.00 |
| Hydrogen fluoride (Hydrofluoric acid) | 0.00 |
| 1,2,4-Trimethylbenzene | 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 |
| Toluene | 0.00 |
| Silver compounds | 0.00 |
| Zinc (fume or dust) | 0.00 |
| Methyl isobutyl ketone | 0.00 |
| Methanol | 0.00 |
| Propylene oxide | 0.00 |
| Mercury | 0.00 |
| Ethylene glycol | 0.00 |
| Styrene | 0.00 |
| Benzo[g,h,i]perylene | 0.00 |
| Silver | 0.00 |
| Cyclohexane | 0.00 |
| Cumene | 0.00 |
| Methyl methacrylate | 0.00 |
| n-Butyl alcohol (1-Butanol) | 0.00 |
| Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 0.00 |
| Di(2-ethylhexyl) phthalate | 0.00 |
| N-Methyl-2-pyrrolidone | 0.00 |
| Nonylphenol Ethoxylates | 0.00 |
