| Cobalt | 44.25 |
| Chromium | 29.42 |
| Ethylene oxide | 11.59 |
| 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.) | 8.35 |
| Nickel | 7.08 |
| Dicyclopentadiene | 4.87 |
| Trichloroethylene | 2.72 |
| Maleic anhydride | 2.61 |
| Lead | 2.19 |
| Antimony compounds | 0.64 |
| Acrylonitrile | 0.49 |
| Peracetic acid | 0.48 |
| Diisocyanates | 0.23 |
| Formaldehyde | 0.16 |
| Zinc compounds | 0.15 |
| Di(2-ethylhexyl) phthalate | 0.13 |
| Dichloromethane (Methylene chloride) | 0.06 |
| Butyl acrylate | 0.05 |
| Polycyclic aromatic compounds | 0.04 |
| Hydrogen cyanide | 0.02 |
| N,N-Dimethylformamide | 0.02 |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.01 |
| Toluene diisocyanate (mixed isomers) | 0.01 |
| Phthalic anhydride | 0.01 |
| Lead compounds | 0.01 |
| Copper | 0.01 |
| Nitric acid | 0.01 |
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 0.01 |
| Styrene | 0.01 |
| Toluene | 0.01 |
| 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) | 0.00 |
| Methyl tert-butyl ether | 0.00 |
| Certain glycol ethers | 0.00 |
| Acrylic acid | 0.00 |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.00 |
| Ethyl acrylate | 0.00 |
| Methanol | 0.00 |
| 1,2,4-Trimethylbenzene | 0.00 |
| n-Hexane (Hexane) | 0.00 |
| o-Xylene | 0.00 |
| Methyl methacrylate | 0.00 |
| Xylene (mixed isomers) | 0.00 |
| Ethylene glycol | 0.00 |
| Phenol | 0.00 |
| Acetonitrile | 0.00 |
| Vinyl acetate | 0.00 |
| Silver compounds | 0.00 |
| Benzo[g,h,i]perylene | 0.00 |
| Acetophenone | 0.00 |
| Manganese | 0.00 |
| n-Butyl alcohol (1-Butanol) | 0.00 |
| Formic acid | 0.00 |
| Methyl isobutyl ketone | 0.00 |
| Cyanide compounds | 0.00 |
| Lithium carbonate | 0.00 |
| N-Methyl-2-pyrrolidone | 0.00 |
| Tetrabromobisphenol A | 0.00 |
