| Chromium | 925.01 |
| Cobalt | 584.95 |
| Nickel | 75.85 |
| Trichloroethylene | 74.67 |
| 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.) | 50.79 |
| Hydrazine | 37.92 |
| Nickel compounds | 33.93 |
| Chloroform | 20.07 |
| Benzene | 15.17 |
| Lead | 10.79 |
| Diisocyanates | 9.28 |
| Polycyclic aromatic compounds | 0.92 |
| Naphthalene | 0.89 |
| Zinc compounds | 0.83 |
| Di(2-ethylhexyl) phthalate | 0.80 |
| Formaldehyde | 0.53 |
| Ethylbenzene | 0.38 |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.22 |
| Copper | 0.17 |
| Toluene diisocyanate (mixed isomers) | 0.13 |
| Xylene (mixed isomers) | 0.12 |
| 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) | 0.10 |
| Lead compounds | 0.10 |
| Triethylamine | 0.09 |
| Hydrogen fluoride (Hydrofluoric acid) | 0.05 |
| Hydrogen cyanide | 0.05 |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.04 |
| Antimony compounds | 0.04 |
| n-Hexane (Hexane) | 0.03 |
| 1,2,4-Trimethylbenzene | 0.03 |
| N,N-Dimethylformamide | 0.03 |
| Nitric acid | 0.02 |
| Dichloromethane (Methylene chloride) | 0.02 |
| Certain glycol ethers | 0.02 |
| Toluene | 0.02 |
| Silver compounds | 0.01 |
| Toluene-2,4-diisocyanate | 0.01 |
| Methyl methacrylate | 0.01 |
| Manganese | 0.00 |
| Acetonitrile | 0.00 |
| 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 |
| Phenol | 0.00 |
| Methanol | 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 |
| Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 0.00 |
| n-Butyl alcohol (1-Butanol) | 0.00 |
| Benzoyl peroxide | 0.00 |
| N-Methyl-2-pyrrolidone | 0.00 |
| Nonylphenol Ethoxylates | 0.00 |
