| Cobalt | 282.68 |
| Chromium | 117.64 |
| 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.) | 64.75 |
| Trichloroethylene | 22.08 |
| Nickel compounds | 10.17 |
| Nickel | 9.76 |
| Benzene | 5.22 |
| Chloroform | 4.59 |
| Formaldehyde | 3.92 |
| Diisocyanates | 3.33 |
| Cadmium compounds | 2.89 |
| Toluene diisocyanate (mixed isomers) | 0.58 |
| Polycyclic aromatic compounds | 0.53 |
| Dichloromethane (Methylene chloride) | 0.44 |
| Di(2-ethylhexyl) phthalate | 0.28 |
| Chlorine | 0.25 |
| Copper | 0.17 |
| Xylene (mixed isomers) | 0.10 |
| Ethylbenzene | 0.08 |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.06 |
| Naphthalene | 0.06 |
| Lead | 0.04 |
| n-Hexane (Hexane) | 0.03 |
| Certain glycol ethers | 0.03 |
| Antimony compounds | 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) | 0.02 |
| Triethylamine | 0.02 |
| Lead compounds | 0.02 |
| Hydrogen fluoride (Hydrofluoric acid) | 0.02 |
| 1,2,4-Trimethylbenzene | 0.01 |
| Nitric acid | 0.01 |
| Acetonitrile | 0.01 |
| Zinc compounds | 0.01 |
| Toluene | 0.01 |
| Phenol | 0.01 |
| Silver compounds | 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-2,4-diisocyanate | 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 |
| Manganese | 0.00 |
| Aluminum (fume or dust) | 0.00 |
| Methanol | 0.00 |
| N,N-Dimethylformamide | 0.00 |
| Methyl methacrylate | 0.00 |
| Propylene oxide | 0.00 |
| Ethylene glycol | 0.00 |
| Mercury | 0.00 |
| Styrene | 0.00 |
| Cyclohexane | 0.00 |
| Benzo[g,h,i]perylene | 0.00 |
| Cumene | 0.00 |
| Silver | 0.00 |
| n-Butyl alcohol (1-Butanol) | 0.00 |
| Methyl isobutyl ketone | 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 |
