| Cobalt | 34.79 |
| Chromium | 26.95 |
| Dicyclopentadiene | 19.07 |
| Ethylene oxide | 14.78 |
| 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.) | 7.96 |
| Maleic anhydride | 7.77 |
| Nickel | 5.69 |
| Peracetic acid | 5.37 |
| Acrylonitrile | 4.19 |
| Trichloroethylene | 2.71 |
| Lead | 2.14 |
| Antimony compounds | 0.75 |
| Butyl acrylate | 0.40 |
| Diisocyanates | 0.19 |
| Zinc compounds | 0.15 |
| Formaldehyde | 0.15 |
| Dichloromethane (Methylene chloride) | 0.06 |
| Polycyclic aromatic compounds | 0.05 |
| Phthalic anhydride | 0.03 |
| Styrene | 0.02 |
| Hydrogen cyanide | 0.01 |
| Acrylic acid | 0.01 |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.01 |
| Ethyl acrylate | 0.01 |
| Toluene diisocyanate (mixed isomers) | 0.01 |
| Copper | 0.01 |
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 0.01 |
| Nitric acid | 0.01 |
| Toluene | 0.00 |
| N,N-Dimethylformamide | 0.00 |
| Lead compounds | 0.00 |
| 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 methacrylate | 0.00 |
| Methyl tert-butyl ether | 0.00 |
| Certain glycol ethers | 0.00 |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.00 |
| o-Xylene | 0.00 |
| Ethylene glycol | 0.00 |
| Methanol | 0.00 |
| 1,2,4-Trimethylbenzene | 0.00 |
| Di(2-ethylhexyl) phthalate | 0.00 |
| n-Hexane (Hexane) | 0.00 |
| Xylene (mixed isomers) | 0.00 |
| Phenol | 0.00 |
| Acetonitrile | 0.00 |
| Vinyl acetate | 0.00 |
| Benzo[g,h,i]perylene | 0.00 |
| Silver compounds | 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 |
