| Cobalt | 269.84 |
| Chromium | 107.38 |
| 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.) | 55.50 |
| Trichloroethylene | 24.07 |
| Nickel compounds | 11.12 |
| Nickel | 7.54 |
| Chloroform | 5.72 |
| Diisocyanates | 3.52 |
| Benzene | 2.68 |
| Formaldehyde | 2.31 |
| Polycyclic aromatic compounds | 0.43 |
| Toluene diisocyanate (mixed isomers) | 0.41 |
| Di(2-ethylhexyl) phthalate | 0.30 |
| Dichloromethane (Methylene chloride) | 0.10 |
| Copper | 0.09 |
| Chlorine | 0.08 |
| Xylene (mixed isomers) | 0.07 |
| Naphthalene | 0.07 |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.07 |
| Ethylbenzene | 0.06 |
| Lead | 0.03 |
| Certain glycol ethers | 0.02 |
| Antimony compounds | 0.02 |
| Hydrogen fluoride (Hydrofluoric acid) | 0.02 |
| Triethylamine | 0.02 |
| Lead compounds | 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 |
| Zinc compounds | 0.01 |
| n-Hexane (Hexane) | 0.01 |
| Nitric acid | 0.01 |
| Acetonitrile | 0.01 |
| 1,2,4-Trimethylbenzene | 0.01 |
| Phenol | 0.00 |
| Silver compounds | 0.00 |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.00 |
| Toluene-2,4-diisocyanate | 0.00 |
| Toluene | 0.00 |
| Manganese | 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 |
| N,N-Dimethylformamide | 0.00 |
| Methyl methacrylate | 0.00 |
| Methanol | 0.00 |
| Propylene oxide | 0.00 |
| Ethylene glycol | 0.00 |
| Mercury | 0.00 |
| Cyclohexane | 0.00 |
| Styrene | 0.00 |
| Benzo[g,h,i]perylene | 0.00 |
| Cumene | 0.00 |
| n-Butyl alcohol (1-Butanol) | 0.00 |
| Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 0.00 |
| Methyl isobutyl ketone | 0.00 |
| Benzoyl peroxide | 0.00 |
| N-Methyl-2-pyrrolidone | 0.00 |
| Nonylphenol Ethoxylates | 0.00 |
