| Ethylene oxide | 34.17 |
| 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.) | 28.60 |
| Chromium | 21.93 |
| Trichloroethylene | 7.09 |
| Nickel | 2.65 |
| Maleic anhydride | 2.49 |
| Dicyclopentadiene | 2.08 |
| Antimony compounds | 0.39 |
| Acrylonitrile | 0.20 |
| Diisocyanates | 0.16 |
| Peracetic acid | 0.16 |
| Dichloromethane (Methylene chloride) | 0.06 |
| Polycyclic aromatic compounds | 0.04 |
| Hydrogen fluoride (Hydrofluoric acid) | 0.04 |
| N,N-Dimethylformamide | 0.02 |
| Butyl acrylate | 0.02 |
| Nitric acid | 0.02 |
| 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) | 0.01 |
| Lead compounds | 0.01 |
| Acetonitrile | 0.01 |
| Formaldehyde | 0.01 |
| Phthalic anhydride | 0.01 |
| Lead | 0.01 |
| Phenol | 0.01 |
| Pyridine | 0.00 |
| Styrene | 0.00 |
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 0.00 |
| Di(2-ethylhexyl) phthalate | 0.00 |
| Zinc compounds | 0.00 |
| Ethylene glycol | 0.00 |
| Xylene (mixed isomers) | 0.00 |
| Methyl tert-butyl ether | 0.00 |
| o-Xylene | 0.00 |
| Vinyl acetate | 0.00 |
| Acrylic acid | 0.00 |
| Methyl methacrylate | 0.00 |
| Toluene | 0.00 |
| Ethyl acrylate | 0.00 |
| Methanol | 0.00 |
| Certain glycol ethers | 0.00 |
| Benzo[g,h,i]perylene | 0.00 |
| 1,2,4-Trimethylbenzene | 0.00 |
| n-Hexane (Hexane) | 0.00 |
| Manganese | 0.00 |
| Formic acid | 0.00 |
| 3-Iodo-2-propynyl butylcarbamate | 0.00 |
| Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 0.00 |
| Methyl isobutyl ketone | 0.00 |
| Cyanide compounds | 0.00 |
| Lithium carbonate | 0.00 |
| N-Methyl-2-pyrrolidone | 0.00 |
| MIXTURE | 0.00 |
