| Cobalt | 347.54 |
| Chromium | 196.53 |
| 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.) | 72.01 |
| Trichloroethylene | 33.12 |
| Nickel | 16.43 |
| Nickel compounds | 14.84 |
| Benzene | 14.80 |
| Chloroform | 11.22 |
| Lead | 6.35 |
| Diisocyanates | 4.33 |
| Cadmium compounds | 2.63 |
| Formaldehyde | 1.35 |
| Polycyclic aromatic compounds | 0.76 |
| Toluene diisocyanate (mixed isomers) | 0.51 |
| Zinc compounds | 0.46 |
| Di(2-ethylhexyl) phthalate | 0.43 |
| Chlorine | 0.21 |
| Naphthalene | 0.20 |
| Ethylbenzene | 0.20 |
| Xylene (mixed isomers) | 0.17 |
| Copper | 0.11 |
| Antimony compounds | 0.10 |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.10 |
| Dichloromethane (Methylene chloride) | 0.06 |
| Certain glycol ethers | 0.03 |
| Triethylamine | 0.03 |
| Lead compounds | 0.03 |
| Hydrogen cyanide | 0.03 |
| 1,2,4-Trimethylbenzene | 0.03 |
| 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) | 0.03 |
| Hydrogen fluoride (Hydrofluoric acid) | 0.02 |
| n-Hexane (Hexane) | 0.02 |
| Nitric acid | 0.01 |
| N,N-Dimethylformamide | 0.01 |
| Acetonitrile | 0.01 |
| Silver compounds | 0.01 |
| Toluene-2,4-diisocyanate | 0.00 |
| Cyanide compounds | 0.00 |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.00 |
| Toluene | 0.00 |
| Manganese | 0.00 |
| Ethylene glycol | 0.00 |
| Phenol | 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 |
| o-Xylene | 0.00 |
| Methyl methacrylate | 0.00 |
| Methanol | 0.00 |
| Mercury | 0.00 |
| Cyclohexane | 0.00 |
| Propylene oxide | 0.00 |
| Benzo[g,h,i]perylene | 0.00 |
| Cumene | 0.00 |
| Styrene | 0.00 |
| Methyl isobutyl ketone | 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 |
| Nonylphenol Ethoxylates | 0.00 |
