| Chromium | 86.90 |
| Cobalt | 86.61 |
| 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.) | 10.50 |
| Trichloroethylene | 9.56 |
| Ethylene oxide | 8.29 |
| Nickel | 6.98 |
| Nickel compounds | 3.83 |
| Lead | 3.66 |
| Diisocyanates | 2.05 |
| Antimony compounds | 1.56 |
| Chloroform | 1.37 |
| Dicyclopentadiene | 0.97 |
| Maleic anhydride | 0.88 |
| Dichloromethane (Methylene chloride) | 0.46 |
| Formaldehyde | 0.44 |
| Zinc compounds | 0.25 |
| Di(2-ethylhexyl) phthalate | 0.24 |
| Acrylonitrile | 0.13 |
| Peracetic acid | 0.10 |
| Polycyclic aromatic compounds | 0.07 |
| Hydrogen fluoride (Hydrofluoric acid) | 0.04 |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.04 |
| Methyl tert-butyl ether | 0.03 |
| N,N-Dimethylformamide | 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 |
| Nitric acid | 0.03 |
| Copper | 0.03 |
| Toluene diisocyanate (mixed isomers) | 0.03 |
| Hydrogen cyanide | 0.02 |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.02 |
| Lead compounds | 0.02 |
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 0.02 |
| Triethylamine | 0.01 |
| Butyl acrylate | 0.01 |
| Toluene | 0.01 |
| Acetonitrile | 0.01 |
| Certain glycol ethers | 0.01 |
| Pyridine | 0.00 |
| n-Hexane (Hexane) | 0.00 |
| Phthalic anhydride | 0.00 |
| o-Xylene | 0.00 |
| Methanol | 0.00 |
| Ethylene glycol | 0.00 |
| Silver compounds | 0.00 |
| Phenol | 0.00 |
| Styrene | 0.00 |
| Toluene-2,4-diisocyanate | 0.00 |
| Xylene (mixed isomers) | 0.00 |
| Manganese | 0.00 |
| 1,2,4-Trimethylbenzene | 0.00 |
| Acrylic acid | 0.00 |
| Vinyl acetate | 0.00 |
| Ethyl acrylate | 0.00 |
| Methyl methacrylate | 0.00 |
| Benzo[g,h,i]perylene | 0.00 |
| Acetophenone | 0.00 |
| n-Butyl alcohol (1-Butanol) | 0.00 |
| 3-Iodo-2-propynyl butylcarbamate | 0.00 |
| Methyl isobutyl ketone | 0.00 |
| Formic acid | 0.00 |
| Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 0.00 |
| Cyanide compounds | 0.00 |
| Lithium carbonate | 0.00 |
| N-Methyl-2-pyrrolidone | 0.00 |
| Tetrabromobisphenol A | 0.00 |
