| ATI PRECISION FINISHING LLC - MONACA | MONACA | PA | 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.) | 208 | 0 | 355,457 | 63.29% | 15.8% | 15.6% | |
| ATI PRECISION FINISHING LLC - ZELIENOPLE | ZELIENOPLE | PA | 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.) | 121 | 0 | 74,165 | 13.21% | 7.6% | 10.1% | |
| ATI FLAT ROLLED PRODUCTS LLC-LATROBE PLANT | LATROBE | PA | Cobalt compounds | 68 | 0 | 20,500 | 3.65% | 11.4% | 9.1% | |
| ATI PRECISION FINISHING LLC - ROCHESTER FACILITY | ROCHESTER | PA | 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 | 0 | 20,394 | 3.63% | 16.9% | 16.9% | |
| ATI PRECISION FINISHING LLC - MONACA | MONACA | PA | Nickel compounds | 92 | 0 | 14,784 | 2.63% | 15.8% | 15.6% | |
| ATI FLAT ROLLED PRODUCTS LLC-LATROBE PLANT | LATROBE | PA | Nickel compounds | 1,446 | 0 | 13,362 | 2.38% | 11.5% | 9.4% | |
| ATI SPECIALTY MATERIALS - BAKERS SITE | MONROE | NC | Cobalt | 6 | 0 | 11,814 | 2.10% | 8.4% | 38.9% | |
| ATI FLAT ROLLED PRODUCTS LLC-LATROBE PLANT | LATROBE | PA | 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.) | 707 | 0 | 9,425 | 1.68% | 11.5% | 9.3% | |
| ATI FLAT ROLLED PRODUCTS HOLDINGS LLC | BRACKENRIDGE | PA | Nickel compounds | 271 | 0 | 8,154 | 1.45% | 12.6% | 17.6% | |
| ATI PRECISION FINISHING LLC - ZELIENOPLE | ZELIENOPLE | PA | Nickel compounds | 54 | 0 | 4,211 | 0.75% | 7.6% | 10.1% | |
| JESSOP STEEL LLC | WASHINGTON | PA | Nickel compounds | 70 | 0 | 3,663 | 0.65% | 12.3% | 19.4% | |
| ATI SPECIALTY MATERIALS - MONROE PLANT | MONROE | NC | Cobalt | 3 | 0 | 3,659 | 0.65% | 12.1% | 49.4% | |
| ATI LADISH LLC. | CUDAHY | WI | Cobalt | 3 | 0 | 3,093 | 0.55% | 15.1% | 39.6% | |
| ATI FLAT ROLLED PRODUCTS HOLDINGS LLC | BRACKENRIDGE | PA | 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.) | 48 | 0 | 2,987 | 0.53% | 13.1% | 17.7% | |
| ATI POWDER METALS - OAKDALE | OAKDALE | PA | Cobalt | 1 | 0 | 2,721 | 0.48% | 10.4% | 21.4% | |
| ATI PRECISION FINISHING LLC - ROCHESTER FACILITY | ROCHESTER | PA | Nickel compounds | 28 | 0 | 2,595 | 0.46% | 16.9% | 16.9% | |
| ATI FLAT ROLLED PRODUCTS HOLDINGS LLC | VANDERGRIFT | PA | 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.) | 69 | 0 | 1,555 | 0.28% | 16.6% | 14.7% | |
| ATI FLAT ROLLED PRODUCTS HOLDINGS LLC | BRACKENRIDGE | PA | Cobalt compounds | 2 | 0 | 1,537 | 0.27% | 12.6% | 17.6% | |
| JESSOP STEEL LLC | WASHINGTON | PA | 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.) | 17 | 0 | 1,227 | 0.22% | 12.2% | 19.4% | |
| ATI SPECIALTY ALLOYS & COMPONENTS LLC | ALBANY | OR | Chlorine | 2,339 | 0 | 880 | 0.16% | 12.3% | 27.4% | |
| ATI SPECIALTY MATERIALS - BAKERS SITE | MONROE | NC | Nickel | 9 | 0 | 568 | 0.10% | 8.6% | 39.4% | |
| ATI SPECIALTY MATERIALS - BAKERS SITE | MONROE | NC | Chromium | 6 | 0 | 540 | 0.10% | 8.4% | 38.8% | |
| ATI FLAT ROLLED PRODUCTS HOLDINGS LLC | VANDERGRIFT | PA | Nickel compounds | 30 | 0 | 522 | 0.09% | 17.4% | 14.1% | |
| ATI POWDER METALS - OAKDALE | OAKDALE | PA | Chromium | 0 | 0 | 467 | 0.08% | 10.4% | 21.4% | |
| JEWEL ACQUISITION LLC-LOUISVILLE | LOUISVILLE | OH | 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.) | 12 | 0 | 429 | 0.08% | 13.8% | 15.5% | |
| ATI SPECIALTY MATERIALS - MONROE PLANT | MONROE | NC | Nickel | 9 | 0 | 403 | 0.07% | 12.1% | 49.4% | |
| ATI LADISH LLC. | CUDAHY | WI | Nickel | 10 | 0 | 342 | 0.06% | 15.1% | 39.6% | |
| JEWEL ACQUISITION LLC-LOUISVILLE | LOUISVILLE | OH | Nickel compounds | 12 | 0 | 309 | 0.06% | 13.8% | 15.5% | |
| ATI LADISH LLC. | CUDAHY | WI | Chromium | 5 | 0 | 238 | 0.04% | 15.1% | 39.6% | |
| ATI SPECIALTY ALLOYS & COMPONENTS LLC | ALBANY | OR | Phosgene | 996 | 0 | 221 | 0.04% | 12.1% | 27.1% | |
| ALLVAC RICHBURG PLANT | RICHBURG | SC | Nickel | 6 | 0 | 165 | 0.03% | 9.3% | 35.0% | |
| ATI SPECIALTY ALLOYS & COMPONENTS LLC | ALBANY | OR | Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 500 | 0 | 162 | 0.03% | 11.0% | 25.8% | |
| ATI SPECIALTY MATERIALS - MONROE PLANT | MONROE | NC | Chromium | 2 | 0 | 158 | 0.03% | 12.1% | 49.4% | |
| ATI SPECIALTY ALLOYS & COMPONENTS LLC | ALBANY | OR | Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 14,781 | 0 | 139 | 0.02% | 10.9% | 25.7% | |
| ATI FLAT ROLLED PRODUCTS HOLDINGS LLC | BRACKENRIDGE | PA | Manganese compounds | 470 | 0 | 136 | 0.02% | 12.1% | 17.4% | |
| ATI SPECIALTY ALLOYS & COMPONENTS LLC | ALBANY | OR | Nickel | 2 | 0 | 116 | 0.02% | 10.8% | 25.6% | |
| ATI FLAT ROLLED PRODUCTS LLC-LATROBE PLANT | LATROBE | PA | Manganese compounds | 761 | 0 | 94 | 0.02% | 11.5% | 9.3% | |
| JESSOP STEEL LLC | WASHINGTON | PA | Nitric acid | 3,114 | 0 | 65 | 0.01% | 14.7% | 19.8% | |
| ATI SPECIALTY MATERIALS-LOCKPORT PLANT | LOCKPORT | NY | Nickel compounds | 2 | 0 | 62 | 0.01% | 14.3% | 24.7% | |
| ALLVAC RICHBURG PLANT | RICHBURG | SC | Chromium | 1 | 0 | 56 | 0.01% | 8.5% | 35.5% | |
| ATI PRECISION FINISHING LLC - MONACA | MONACA | PA | Manganese | 20 | 0 | 41 | 0.01% | 15.8% | 15.6% | |
| ATI POWDER METALS - OAKDALE | OAKDALE | PA | Nickel | 0 | 0 | 30 | 0.01% | 10.4% | 21.4% | |
| ATI FLAT ROLLED PRODUCTS HOLDINGS LLC | BRACKENRIDGE | PA | Lead compounds | 39 | 0 | 25 | 0.00% | 12.4% | 17.5% | |
| JESSOP STEEL LLC | WASHINGTON | PA | Hydrogen fluoride (Hydrofluoric acid) | 1,246 | 0 | 24 | 0.00% | 14.6% | 19.8% | |
| ATI FLAT ROLLED PRODUCTS LLC-LATROBE PLANT | LATROBE | PA | Lead compounds | 121 | 0 | 19 | 0.00% | 11.7% | 11.3% | |
| ATI FLAT ROLLED PRODUCTS HOLDINGS LLC | VANDERGRIFT | PA | Manganese compounds | 75 | 0 | 16 | 0.00% | 16.6% | 14.7% | |
| ATI SPECIALTY ALLOYS & COMPONENTS LLC | ALBANY | OR | Nitric acid | 1,501 | 0 | 12 | 0.00% | 11.4% | 26.2% | |
| ALLVAC RICHBURG PLANT | RICHBURG | SC | Cobalt | 0 | 0 | 12 | 0.00% | 8.5% | 35.5% | |
| ATI PRECISION FINISHING LLC - ZELIENOPLE | ZELIENOPLE | PA | Manganese compounds | 12 | 0 | 12 | 0.00% | 7.6% | 10.1% | |
| ATI SPECIALTY ALLOYS & COMPONENTS LLC | ALBANY | OR | Methyl isobutyl ketone | 552,195 | 13,704 | 10 | 0.00% | 12.3% | 27.2% | |
| ATI PRECISION FINISHING LLC - ROCHESTER FACILITY | ROCHESTER | PA | Manganese compounds | 6 | 0 | 8 | 0.00% | 18.5% | 17.6% | |
| ATI FLAT ROLLED PRODUCTS HOLDINGS LLC | VANDERGRIFT | PA | Nitric acid | 1,539 | 0 | 7 | 0.00% | 16.5% | 14.8% | |
| ATI SPECIALTY ALLOYS & COMPONENTS LLC | ALBANY | OR | Hydrogen fluoride (Hydrofluoric acid) | 587 | 0 | 5 | 0.00% | 11.3% | 26.2% | |
| ATI SPECIALTY MATERIALS - BAKERS SITE | MONROE | NC | Manganese | 5 | 0 | 4 | 0.00% | 8.3% | 38.6% | |
| JESSOP STEEL LLC | WASHINGTON | PA | Manganese compounds | 6 | 0 | 4 | 0.00% | 12.2% | 19.4% | |
| JEWEL ACQUISITION LLC-LOUISVILLE | LOUISVILLE | OH | Manganese compounds | 5 | 0 | 2 | 0.00% | 13.8% | 15.4% | |
| JEWEL ACQUISITION LLC-LOUISVILLE | LOUISVILLE | OH | Nitric acid | 232 | 0 | 2 | 0.00% | 13.8% | 15.5% | |
| ATI SPECIALTY ALLOYS & COMPONENTS LLC | ALBANY | OR | Hexachlorobenzene | 0 | 0 | 1 | 0.00% | 12.5% | 27.5% | |
| JESSOP STEEL LLC | WASHINGTON | PA | Copper compounds (this category does not include copper phthalocyanine compounds that are substituted with only hydrogen, and/or chlorine, and/or bromine.) | 15 | 0 | 1 | 0.00% | 12.3% | 19.3% | |
| JEWEL ACQUISITION LLC-LOUISVILLE | LOUISVILLE | OH | Copper | 17 | 0 | 1 | 0.00% | 13.8% | 15.4% | |
| JEWEL ACQUISITION LLC-LOUISVILLE | LOUISVILLE | OH | Hydrogen fluoride (Hydrofluoric acid) | 100 | 0 | 1 | 0.00% | 13.8% | 15.5% | |
| ATI SPECIALTY MATERIALS - BAKERS SITE | MONROE | NC | Copper | 6 | 0 | 1 | 0.00% | 8.2% | 38.1% | |
| ALLVAC RICHBURG PLANT | RICHBURG | SC | Nitric acid | 59 | 0 | 1 | 0.00% | 8.6% | 35.5% | |
| ATI FLAT ROLLED PRODUCTS HOLDINGS LLC | VANDERGRIFT | PA | Hydrogen fluoride (Hydrofluoric acid) | 98 | 0 | 0 | 0.00% | 16.5% | 14.8% | |
| ALLVAC RICHBURG PLANT | RICHBURG | SC | Manganese | 1 | 0 | 0 | 0.00% | 9.4% | 34.9% | |
| ATI FLAT ROLLED PRODUCTS HOLDINGS LLC | BRACKENRIDGE | PA | Copper compounds (this category does not include copper phthalocyanine compounds that are substituted with only hydrogen, and/or chlorine, and/or bromine.) | 13 | 0 | 0 | 0.00% | 11.3% | 17.0% | |
| ATI SPECIALTY ALLOYS & COMPONENTS LLC | ALBANY | OR | Lead compounds | 1 | 0 | 0 | 0.00% | 12.5% | 27.5% | |
| ATI SPECIALTY ALLOYS & COMPONENTS LLC | ALBANY | OR | 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) | 1,863 | 0 | 0 | 0.00% | 11.9% | 26.9% | |
| ATI SPECIALTY MATERIALS - MONROE PLANT | MONROE | NC | Manganese | 0 | 0 | 0 | 0.00% | 12.1% | 49.4% | |
| ATI SPECIALTY MATERIALS - MONROE PLANT | MONROE | NC | Copper | 3 | 0 | 0 | 0.00% | 12.2% | 49.6% | |
| ATI HUNTSVILLE OPERATIONS | HUNTSVILLE | AL | Hydrogen fluoride (Hydrofluoric acid) | 6 | 0 | 0 | 0.00% | 9.2% | 36.2% | |
| JEWEL ACQUISITION LLC-LOUISVILLE | LOUISVILLE | OH | Lead | 0 | 0 | 0 | 0.00% | 13.8% | 15.5% | |
| ATI LADISH LLC. | CUDAHY | WI | Nitric acid | 6 | 0 | 0 | 0.00% | 15.1% | 39.6% | |
| ATI FLAT ROLLED PRODUCTS HOLDINGS LLC | BRACKENRIDGE | PA | Zinc compounds | 38 | 0 | 0 | 0.00% | 10.8% | 16.9% | |
| ATI HUNTSVILLE OPERATIONS | HUNTSVILLE | AL | Nitric acid | 2 | 0 | 0 | 0.00% | 9.2% | 36.2% | |
| ATI FLAT ROLLED PRODUCTS HOLDINGS LLC | BRACKENRIDGE | PA | Hydrogen fluoride (Hydrofluoric acid) | 9 | 0 | 0 | 0.00% | 10.5% | 16.7% | |
| ATI LADISH LLC. | CUDAHY | WI | Hydrogen fluoride (Hydrofluoric acid) | 3 | 0 | 0 | 0.00% | 15.1% | 39.6% | |
| ATI FLAT ROLLED PRODUCTS HOLDINGS LLC | BRACKENRIDGE | PA | Nitric acid | 6 | 0 | 0 | 0.00% | 10.5% | 16.7% | |
| ALLVAC RICHBURG PLANT | RICHBURG | SC | Copper | 0 | 0 | 0 | 0.00% | 8.7% | 35.4% | |
