| Cobalt | 308.03 |
| Chromium | 130.15 |
| 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.) | 86.35 |
| Trichloroethylene | 21.06 |
| Nickel | 13.21 |
| Nickel compounds | 9.59 |
| Benzene | 8.17 |
| Chloroform | 4.46 |
| Cadmium compounds | 4.37 |
| Diisocyanates | 3.18 |
| Formaldehyde | 3.12 |
| Toluene diisocyanate (mixed isomers) | 1.00 |
| Polycyclic aromatic compounds | 0.70 |
| Dichloromethane (Methylene chloride) | 0.35 |
| Di(2-ethylhexyl) phthalate | 0.30 |
| Chlorine | 0.29 |
| Xylene (mixed isomers) | 0.19 |
| Copper | 0.13 |
| Ethylbenzene | 0.10 |
| Antimony compounds | 0.10 |
| Naphthalene | 0.07 |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.06 |
| Certain glycol ethers | 0.05 |
| Lead | 0.05 |
| Hydrogen fluoride (Hydrofluoric acid) | 0.03 |
| n-Hexane (Hexane) | 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 |
| Lead compounds | 0.02 |
| Triethylamine | 0.02 |
| 1,2,4-Trimethylbenzene | 0.01 |
| Nitric acid | 0.01 |
| Acetonitrile | 0.01 |
| Zinc compounds | 0.01 |
| Phenol | 0.01 |
| Toluene | 0.01 |
| Cyanide compounds | 0.01 |
| 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 |
| Copper compounds (this category does not include copper phthalocyanine compounds that are substituted with only hydrogen, and/or chlorine, and/or bromine.) | 0.00 |
| Pyridine | 0.00 |
| Aluminum (fume or dust) | 0.00 |
| Manganese | 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 |
| Silver | 0.00 |
| Benzo[g,h,i]perylene | 0.00 |
| Cumene | 0.00 |
| Vinyl acetate | 0.00 |
| 3-Iodo-2-propynyl butylcarbamate | 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 |
