| 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.) | 171.86 |
| Cobalt | 92.47 |
| Chromium | 67.56 |
| Nickel | 37.28 |
| Cadmium compounds | 17.89 |
| Ethylene oxide | 17.38 |
| Trichloroethylene | 8.90 |
| Nickel compounds | 4.62 |
| Benzene | 3.88 |
| Diisocyanates | 3.53 |
| Toluene diisocyanate (mixed isomers) | 2.82 |
| Polycyclic aromatic compounds | 1.86 |
| Chlorine | 0.98 |
| Chloroform | 0.90 |
| Formaldehyde | 0.82 |
| Di(2-ethylhexyl) phthalate | 0.79 |
| Antimony compounds | 0.58 |
| Copper | 0.34 |
| Acrylonitrile | 0.33 |
| Xylene (mixed isomers) | 0.14 |
| Hydrogen fluoride (Hydrofluoric acid) | 0.09 |
| Certain glycol ethers | 0.06 |
| Nitric acid | 0.06 |
| Naphthalene | 0.06 |
| Ethylbenzene | 0.05 |
| Lead compounds | 0.04 |
| Lead | 0.04 |
| 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) | 0.04 |
| Acetonitrile | 0.03 |
| Cyanide compounds | 0.03 |
| Dichloromethane (Methylene chloride) | 0.02 |
| Butyl acrylate | 0.02 |
| Triethylamine | 0.02 |
| Maleic anhydride | 0.02 |
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 0.01 |
| Zinc compounds | 0.01 |
| Pyridine | 0.01 |
| N,N-Dimethylformamide | 0.01 |
| Aluminum (fume or dust) | 0.01 |
| Phenol | 0.01 |
| Copper compounds (this category does not include copper phthalocyanine compounds that are substituted with only hydrogen, and/or chlorine, and/or bromine.) | 0.01 |
| Acetophenone | 0.01 |
| Silver compounds | 0.01 |
| Acrylic acid | 0.01 |
| 1,2,4-Trimethylbenzene | 0.01 |
| Toluene | 0.00 |
| Methyl methacrylate | 0.00 |
| Styrene | 0.00 |
| n-Hexane (Hexane) | 0.00 |
| o-Xylene | 0.00 |
| Mercury compounds | 0.00 |
| Vinyl acetate | 0.00 |
| Silver | 0.00 |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.00 |
| Ethylene glycol | 0.00 |
| Mercury | 0.00 |
| Methanol | 0.00 |
| Ethyl acrylate | 0.00 |
| Propylene oxide | 0.00 |
| Cyclohexane | 0.00 |
| 3-Iodo-2-propynyl butylcarbamate | 0.00 |
| Cumene | 0.00 |
| Benzo[g,h,i]perylene | 0.00 |
| Formic acid | 0.00 |
| Methyl isobutyl ketone | 0.00 |
| tert-Butyl alcohol (tert-Butanol) | 0.00 |
| Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 0.00 |
| n-Butyl alcohol (1-Butanol) | 0.00 |
| Lithium carbonate | 0.00 |
| N-Methyl-2-pyrrolidone | 0.00 |
| MIXTURE | 0.00 |
| Nonylphenol Ethoxylates | 0.00 |
