| Chromium | 1,248.89 |
| Cobalt | 782.39 |
| Trichloroethylene | 104.76 |
| Nickel | 72.96 |
| 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.) | 56.05 |
| Nickel compounds | 47.38 |
| Hydrazine | 46.85 |
| Chloroform | 24.10 |
| Benzene | 16.07 |
| Lead | 13.18 |
| Diisocyanates | 12.57 |
| Polycyclic aromatic compounds | 1.33 |
| Di(2-ethylhexyl) phthalate | 1.04 |
| Zinc compounds | 0.99 |
| Naphthalene | 0.97 |
| 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) | 0.55 |
| Formaldehyde | 0.46 |
| Ethylbenzene | 0.36 |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.31 |
| Copper | 0.26 |
| Triethylamine | 0.17 |
| Toluene diisocyanate (mixed isomers) | 0.16 |
| Xylene (mixed isomers) | 0.11 |
| Lead compounds | 0.10 |
| Hydrogen fluoride (Hydrofluoric acid) | 0.07 |
| Antimony compounds | 0.06 |
| Hydrogen cyanide | 0.06 |
| n-Hexane (Hexane) | 0.06 |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.05 |
| Nitric acid | 0.03 |
| N,N-Dimethylformamide | 0.03 |
| 1,2,4-Trimethylbenzene | 0.03 |
| Dichloromethane (Methylene chloride) | 0.02 |
| Toluene | 0.02 |
| Certain glycol ethers | 0.02 |
| Silver compounds | 0.02 |
| Methyl methacrylate | 0.02 |
| Toluene-2,4-diisocyanate | 0.01 |
| Manganese | 0.01 |
| Acetonitrile | 0.01 |
| Ethylene glycol | 0.00 |
| o-Xylene | 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 |
| Methanol | 0.00 |
| Phenol | 0.00 |
| Cyclohexane | 0.00 |
| Benzo[g,h,i]perylene | 0.00 |
| Mercury | 0.00 |
| Propylene oxide | 0.00 |
| Sodium nitrite | 0.00 |
| Methyl isobutyl ketone | 0.00 |
| Cumene | 0.00 |
| Styrene | 0.00 |
| n-Butyl alcohol (1-Butanol) | 0.00 |
| Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 0.00 |
| Benzoyl peroxide | 0.00 |
| N-Methyl-2-pyrrolidone | 0.00 |
| Tetrabromobisphenol A | 0.00 |
| Nonylphenol Ethoxylates | 0.00 |
