| Cobalt | 48.90 |
| Chromium | 32.34 |
| 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.) | 14.27 |
| Ethylene oxide | 13.49 |
| Nickel | 7.88 |
| Dicyclopentadiene | 4.08 |
| Lead | 2.59 |
| Trichloroethylene | 2.51 |
| Maleic anhydride | 2.21 |
| Antimony compounds | 1.45 |
| Acrylonitrile | 0.46 |
| Peracetic acid | 0.42 |
| Diisocyanates | 0.23 |
| Formaldehyde | 0.20 |
| Zinc compounds | 0.18 |
| Di(2-ethylhexyl) phthalate | 0.16 |
| Dichloromethane (Methylene chloride) | 0.07 |
| Polycyclic aromatic compounds | 0.05 |
| Butyl acrylate | 0.04 |
| N,N-Dimethylformamide | 0.02 |
| Hydrogen cyanide | 0.01 |
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 0.01 |
| 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 |
| Lead compounds | 0.01 |
| Copper | 0.01 |
| Nitric acid | 0.01 |
| Phthalic anhydride | 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 |
| Styrene | 0.00 |
| Methyl tert-butyl ether | 0.00 |
| Certain glycol ethers | 0.00 |
| 1,2,4-Trimethylbenzene | 0.00 |
| n-Hexane (Hexane) | 0.00 |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.00 |
| Methanol | 0.00 |
| Ethylene glycol | 0.00 |
| Acrylic acid | 0.00 |
| Ethyl acrylate | 0.00 |
| o-Xylene | 0.00 |
| Xylene (mixed isomers) | 0.00 |
| Methyl methacrylate | 0.00 |
| Phenol | 0.00 |
| Vinyl acetate | 0.00 |
| Acetonitrile | 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 |
| Cyanide compounds | 0.00 |
| Methyl isobutyl ketone | 0.00 |
| Lithium carbonate | 0.00 |
| N-Methyl-2-pyrrolidone | 0.00 |
| Tetrabromobisphenol A | 0.00 |
