| Lead | 180.95 |
| Chromium | 157.94 |
| Cobalt | 155.13 |
| Hydrazine | 46.54 |
| Trichloroethylene | 15.54 |
| Ethylene oxide | 15.13 |
| Zinc compounds | 12.68 |
| Nickel | 11.69 |
| Nickel compounds | 6.66 |
| Chloroform | 4.82 |
| Diisocyanates | 3.78 |
| Benzene | 2.08 |
| Di(2-ethylhexyl) phthalate | 0.90 |
| Polycyclic aromatic compounds | 0.74 |
| 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.) | 0.69 |
| Copper | 0.55 |
| Hydrogen cyanide | 0.52 |
| N,N-Dimethylformamide | 0.41 |
| Toluene diisocyanate (mixed isomers) | 0.31 |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.25 |
| Formaldehyde | 0.24 |
| Antimony compounds | 0.24 |
| Naphthalene | 0.10 |
| Triethylamine | 0.09 |
| Toluene | 0.09 |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.07 |
| Ethylbenzene | 0.07 |
| Lead compounds | 0.06 |
| Xylene (mixed isomers) | 0.05 |
| Ethylene glycol | 0.05 |
| n-Hexane (Hexane) | 0.03 |
| Dichloromethane (Methylene chloride) | 0.02 |
| Hydrogen fluoride (Hydrofluoric acid) | 0.02 |
| Nitric acid | 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) | 0.01 |
| o-Xylene | 0.01 |
| Certain glycol ethers | 0.00 |
| Toluene-2,4-diisocyanate | 0.00 |
| 1,2,4-Trimethylbenzene | 0.00 |
| Silver compounds | 0.00 |
| Methanol | 0.00 |
| Manganese | 0.00 |
| Acetonitrile | 0.00 |
| Methyl tert-butyl ether | 0.00 |
| Methyl methacrylate | 0.00 |
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 0.00 |
| Benzo[g,h,i]perylene | 0.00 |
| Cyclohexane | 0.00 |
| Sodium nitrite | 0.00 |
| Methyl isobutyl ketone | 0.00 |
| n-Butyl alcohol (1-Butanol) | 0.00 |
| Phenol | 0.00 |
| Formic acid | 0.00 |
| Acetophenone | 0.00 |
| Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 0.00 |
| Cumene | 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 |
| Benzoyl peroxide | 0.00 |
| N-Methyl-2-pyrrolidone | 0.00 |
| Tetrabromobisphenol A | 0.00 |
