| 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.) | 78.66 |
| Ethylene oxide | 45.45 |
| Cobalt | 43.51 |
| Chromium | 32.01 |
| Trichloroethylene | 7.94 |
| Nickel | 7.65 |
| Diisocyanates | 7.41 |
| Cadmium compounds | 5.91 |
| Nickel compounds | 3.90 |
| Lead | 2.33 |
| Antimony compounds | 1.94 |
| Chloroform | 1.67 |
| Maleic anhydride | 1.63 |
| Benzene | 0.88 |
| Toluene diisocyanate (mixed isomers) | 0.55 |
| Dicyclopentadiene | 0.54 |
| Chlorine | 0.34 |
| Hydrogen fluoride (Hydrofluoric acid) | 0.30 |
| Di(2-ethylhexyl) phthalate | 0.29 |
| Acrylonitrile | 0.28 |
| Polycyclic aromatic compounds | 0.19 |
| Zinc compounds | 0.18 |
| Dichloromethane (Methylene chloride) | 0.14 |
| Peracetic acid | 0.13 |
| Nitric acid | 0.11 |
| Copper | 0.09 |
| Acetonitrile | 0.07 |
| Xylene (mixed isomers) | 0.05 |
| Pyridine | 0.04 |
| Formaldehyde | 0.04 |
| Lead compounds | 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 |
| Naphthalene | 0.03 |
| Certain glycol ethers | 0.03 |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.02 |
| Ethylbenzene | 0.02 |
| Hydrogen cyanide | 0.01 |
| Butyl acrylate | 0.01 |
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 0.01 |
| Phenol | 0.01 |
| Methyl tert-butyl ether | 0.01 |
| Cyanide compounds | 0.01 |
| Triethylamine | 0.01 |
| Phthalic anhydride | 0.01 |
| Aluminum (fume or dust) | 0.00 |
| Copper compounds (this category does not include copper phthalocyanine compounds that are substituted with only hydrogen, and/or chlorine, and/or bromine.) | 0.00 |
| Acetophenone | 0.00 |
| Silver compounds | 0.00 |
| N,N-Dimethylformamide | 0.00 |
| 1,2,4-Trimethylbenzene | 0.00 |
| o-Xylene | 0.00 |
| Styrene | 0.00 |
| Ethylene glycol | 0.00 |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.00 |
| Methanol | 0.00 |
| Toluene | 0.00 |
| Vinyl acetate | 0.00 |
| Toluene-2,4-diisocyanate | 0.00 |
| Manganese | 0.00 |
| n-Hexane (Hexane) | 0.00 |
| Acrylic acid | 0.00 |
| Ethyl acrylate | 0.00 |
| Methyl methacrylate | 0.00 |
| Mercury | 0.00 |
| 3-Iodo-2-propynyl butylcarbamate | 0.00 |
| Silver | 0.00 |
| Formic acid | 0.00 |
| Benzo[g,h,i]perylene | 0.00 |
| Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 0.00 |
| Cumene | 0.00 |
| Methyl isobutyl ketone | 0.00 |
| Cyclohexane | 0.00 |
| Lithium carbonate | 0.00 |
| N-Methyl-2-pyrrolidone | 0.00 |
| MIXTURE | 0.00 |
| Nonylphenol Ethoxylates | 0.00 |
