| STSteel Technolgies, LLC | Decatur | AL | — | ◇ UNVERIFIED |
| SCStepan Company | Anaheim | CA | — | ◇ UNVERIFIED |
| SMStructural Metals INC | Seguin | TX | — | ◇ UNVERIFIED |
| SAStyrolution America LLC | Texas City | TX | — | ◇ UNVERIFIED |
| SCSunbelt Corporation | Rock Hill | SC | — | ◇ UNVERIFIED |
 Sun Chemical CORP Color Intermediates | Cincinnati | OH | — | ◇ UNVERIFIED |
| TCTexas City Crude Oil Terminal | Texas City | TX | — | ◇ UNVERIFIED |
| TPTexas Petrochemicals | Houston | TX | — | ◇ UNVERIFIED |
| TDThe Dow Chemical CO - Louisiana Operations | Plaquemine | LA | — | ◇ UNVERIFIED |
| TDThe Dow Chemical Company U.s.a., Midland | Midland | MI | — | ◇ UNVERIFIED |
| TDThe Dow Chemical - La Porte Facility | La Porte | TX | — | ◇ UNVERIFIED |
| TWThe Whitaker Company | Ocoee | FL | — | ◇ UNVERIFIED |
| TCTiarco Chemical | Greenville | SC | — | ◇ UNVERIFIED |
| TPTotalenergies Petrochemicals & Refining USA INC - Cos-mar Styrene Monomer Plant | Carville | LA | — | ◇ UNVERIFIED |
| TPTotal Petrochemicals Usa, INC. Bayport Hdpe Plant | Pasadena | TX | — | ◇ UNVERIFIED |
| TCTrans Chemical Corp-trans Chemical CORP | Saint Louis | MO | — | ◇ UNVERIFIED |
| THTrecora Hydrocarbons Combined Facility | Silsbee | TX | — | ◇ UNVERIFIED |
| TITrical INC | Hollister | CA | — | ◇ UNVERIFIED |
| UCUnion Carbide Corporation, Institute Plant | Institute | WV | — | ◇ UNVERIFIED |
| UCUnion Carbide CORP -so Charleston Fac. | South Charleston | WV | — | ◇ UNVERIFIED |
| UCUnion Carbide CORP - St Charles Plant | Hahnville | LA | — | ◇ UNVERIFIED |
| UCUnion Carbide CORP Technology Park | Charleston | WV | — | ◇ UNVERIFIED |
| UCUnion Carbide Seadrift Cogen | Seadrift | TX | — | ◇ UNVERIFIED |
| UTUnivation Technologies LLC - Catalyst Plant | South Charleston | WV | — | ◇ UNVERIFIED |
| USUniversal Stainless & Alloy Prod/prp Division | Titusville | PA | — | ◇ UNVERIFIED |
| ULUss-upi, LLC | Pittsburg | CA | — | ◇ UNVERIFIED |
| VRValero Renewable Fuels Company | Aurora | SD | — | ◇ UNVERIFIED |
| VLValor LLC | Bowling Green | KY | — | ◇ UNVERIFIED |
| VLValor LLC - Valor Oil Alsop Ln | Owensboro | KY | — | ◇ UNVERIFIED |
| VIVanner INC | Hilliard | OH | — | ◇ UNVERIFIED |
| VCVicor CORP | Andover | MA | — | ◇ UNVERIFIED |
| VSVictoria Site | Victoria | TX | — | ◇ UNVERIFIED |
| VPVisual Pak American Blending | Waukegan | IL | — | ◇ UNVERIFIED |
| VPVoranol_specialty Polyurethane Chemicals (spc) | Freeport | TX | — | ◇ UNVERIFIED |
| VRVp Racing Fuels | Newark | DE | — | ◇ UNVERIFIED |
| VRVp Racing Fuels Fulfillment Center | Huntingdon | TN | — | ◇ UNVERIFIED |
 Vp Racing Fuels INC. | Terre Haute | IN | — | ◇ UNVERIFIED |
| VRVs Rubber | Lebanon | PA | — | ◇ UNVERIFIED |
| WPWestern Petroleum INC | Paramount | CA | — | ◇ UNVERIFIED |
| WCWestlake Chemicals & Vinyls LLC - Plaquemine Facility | Plaquemine | LA | — | ◇ UNVERIFIED |
| WNWestlake Natrium Llc, Westlake Natrium | Proctor | WV | — | ◇ UNVERIFIED |
| WPWestlake Petrochemical LP | Sulphur | LA | — | ◇ UNVERIFIED |
| WPWestlake Polymers Corp, Poly 1 & 2 | Sulphur | LA | — | ◇ UNVERIFIED |
| WVWestlake Vinyls CO LP - Geismar Facility | Geismar | LA | — | ◇ UNVERIFIED |
| WEWilmore Electronics CO INC | Hillsborough | NC | — | ◇ UNVERIFIED |
| WCWoodstream Corporation | Knoxville | TN | — | ◇ UNVERIFIED |
| WLWsp Lock Haven Manufacturing Facility | Castanea | PA | — | ◇ UNVERIFIED |
| 3R300A report for 2018 | Richmond | CA | 20–99 | ◐ LIKELY ACTIVE |
| 3E360 Electrical, LLC | Dubois | WY | — | ◐ LIKELY ACTIVE |
| ALA-1vet LLC | Indianapolis | IN | — | ◐ LIKELY ACTIVE |
