| TOTidelands Oil Production Co/pier S East | Long Beach | CA | — | ◇ UNVERIFIED |
| TOTidelands Oil Production Co/reef Site | Long Beach | CA | — | ◇ UNVERIFIED |
| TOTidelands Oil Production Co/standard Lea | Long Beach | CA | — | ◇ UNVERIFIED |
| TOTidelands Oil Production Co/west Dow | Long Beach | CA | — | ◇ UNVERIFIED |
| TOTidelands Oil Production Co/w Wells Site | Long Beach | CA | — | ◇ UNVERIFIED |
| TOTidelands Oil Production Co/yard Prod Ya | Long Beach | CA | — | ◇ UNVERIFIED |
| TOTidelands Oil Production Co/z1 Site | Long Beach | CA | — | ◇ UNVERIFIED |
| TOTidelands Oil Production/pier E Site | Long Beach | CA | — | ◇ UNVERIFIED |
| TPTiger-sul Products LLC | Stockton | CA | — | ◇ UNVERIFIED |
| TLTke LLC | Liberty | TN | — | ◇ UNVERIFIED |
| TOTmb Oil CO INC #1 | Anaheim | CA | — | ◇ UNVERIFIED |
| TOTmb Oil CO INC #2 | Anaheim | CA | — | ◇ UNVERIFIED |
| TCTokai Carbon Cb | Long Beach | CA | — | ◇ UNVERIFIED |
| TIToledo Industrial Center Company | Toledo | OH | — | ◇ UNVERIFIED |
| TCTooling & Components Corp | Toledo | OH | — | ◇ UNVERIFIED |
| TRTorrance Refining Company LLC | Torrance | CA | — | ◇ UNVERIFIED |
| TRTosco Refining Company | Carson | CA | — | ◇ UNVERIFIED |
| TRTosco Refining Company | Wilmington | CA | — | ◇ UNVERIFIED |
| TMTotal Molding Solutions INC | Tecumseh | MI | — | ◇ UNVERIFIED |
| TPTotal Petrochemicals & Refining Usa, INC. | La Porte | TX | — | ◇ UNVERIFIED |
| TSTotal Safety | Port Arthur | TX | — | ◇ UNVERIFIED |
| TSTotal Source Molders, INC. | Reinbeck | IA | — | ◇ UNVERIFIED |
| TIToter INC | Sanger | CA | — | ◇ UNVERIFIED |
 Tournesol Siteworks | Fremont | CA | — | ◇ UNVERIFIED |
| TPTower Product LLC | Jacksonville | FL | — | ◇ UNVERIFIED |
| TCTowne Cleaners | Rohnert Park | CA | — | ◇ UNVERIFIED |
| TFToxguard Fluid Technologies INC | Stanton | CA | — | ◇ UNVERIFIED |
| TPTpi Petroleum Incorporated | Alma | MI | — | ◇ UNVERIFIED |
| TCTrabuco Canyon Waterdistrict | Lake Forest | CA | — | ◇ UNVERIFIED |
| TITranschem Industries INC. | Fayetteville | GA | — | ◇ UNVERIFIED |
| TATransparent Armor LLC | South Charleston | WV | — | ◇ UNVERIFIED |
| TFTredegar Film Prod Inc/pottsville | Mar Lin | PA | — | ◇ UNVERIFIED |
| TFTriangle Fasteners INC | Ontario | CA | — | ◇ UNVERIFIED |
| TCTribotech Composites INC | Valley View | OH | — | ◇ UNVERIFIED |
| TITrichromatic-west, INC | Bell | CA | — | ◇ UNVERIFIED |
| TRTricor Refining LLC | Bakersfield | CA | — | ◇ UNVERIFIED |
| TPTric Plant | Mccarran | NV | — | ◇ UNVERIFIED |
| TPTri-mack Plastic Mfg. CORP | Bristol | RI | — | ◇ UNVERIFIED |
| TCTrimont Chemicals INC | Peabody | MA | — | ◇ UNVERIFIED |
| TLTrinseo LLC. | Exton | PA | — | ◇ UNVERIFIED |
| TLTrinseo, LLC - Allyn's Point | Ledyard | CT | — | ◇ UNVERIFIED |
| TLTrinseo, LLC - Allyn's Point | Gales Ferry | CT | — | ◇ UNVERIFIED |
| TLTrinseo LLC (p1025) | Midland | MI | — | ◇ UNVERIFIED |
| TSTri Star Aluminum CO LP | Alexandria | TN | — | ◇ UNVERIFIED |
| TPTri-state Plant Food | Dothan | AL | — | ◇ UNVERIFIED |
| TLTronox LLC | Henderson | NV | — | ◇ UNVERIFIED |
| TITrowelon INC | Oneida | WI | — | ◇ UNVERIFIED |
| T3Turbo 3d LLC Dba Fugo | Gardena | CA | — | ◇ UNVERIFIED |
| TGTurner Group, Inc | Marietta | GA | — | ◇ UNVERIFIED |
| TITurner Industries Group, L.l.c. | Baton Rouge | LA | — | ◇ UNVERIFIED |
| TPTurret Punch CO Inc/tpc INC | Fontana | CA | — | ◇ UNVERIFIED |
| TMTwelve - Moses Lake Site | Moses Lake | WA | — | ◇ UNVERIFIED |
| TCTwentieth Century Forge | Hubbard | OR | — | ◇ UNVERIFIED |
| TSTwin State, Inc.- Durant | Durant | IA | — | ◇ UNVERIFIED |
| TITysons INC | Tekamah | NE | — | ◇ UNVERIFIED |
| ULUas Labs LLC | Wausau | WI | — | ◇ UNVERIFIED |
| UAUbe America INC. | Berkeley | CA | — | ◇ UNVERIFIED |
| URUcar Resinas Caribe INC. | Bayamon | PR | — | ◇ UNVERIFIED |
| UHUcla Hematology Oncology Santa Monica | Santa Monica | CA | — | ◇ UNVERIFIED |
| USUdm Systems LLC | Raleigh | NC | — | ◇ UNVERIFIED |
| UFU First Logistics INC. | Elyria | OH | — | ◇ UNVERIFIED |
| UAUintah Advantage, Llc- Petroleum Processing Plant | Uintah County | UT | — | ◇ UNVERIFIED |
| UIUltramar INC | Wilmington | CA | — | ◇ UNVERIFIED |
| UCUltra-poly Corporation | Berwick | PA | — | ◇ UNVERIFIED |
| UPUltra Poly CORP - Portland | Portland | PA | — | ◇ UNVERIFIED |
| UAUmicore Autocat USA INC | Catoosa | OK | — | ◇ UNVERIFIED |
| UCUmicore Cobalt & Energy Products | Maxton | NC | — | ◇ UNVERIFIED |
| UPUmicore Precious Metals Chemistry (pmc) USA LLC | Catoosa | OK | — | ◇ UNVERIFIED |
| USUmicore Specialty Chemicals - Arab Facility | Arab | AL | — | ◇ UNVERIFIED |
| USUmicore Specialty Materials La - Palm Commodities International LLC | Port Allen | LA | — | ◇ UNVERIFIED |
| ULUnifi-kinston LLC | Kinston | NC | — | ◇ UNVERIFIED |
| UCUnion Carbide | Penuelas | PR | — | ◇ UNVERIFIED |
| UCUnion Carbide Brownsville | — | TX | — | ◇ UNVERIFIED |
| UCUnion Carbide Corporation | Piscataway | NJ | — | ◇ UNVERIFIED |
| UCUnion Carbide Corporation | Lugoff | SC | — | ◇ UNVERIFIED |
| UCUnion Carbide Corporation | Woodbine | GA | — | ◇ UNVERIFIED |
| UCUnion Carbide Corporation - Dow Chemical CO | Institute | WV | — | ◇ UNVERIFIED |
| UCUnion Carbide Corporation - Ucar Emulsion Systems | Garland | TX | — | ◇ UNVERIFIED |
| UCUnion Carbide Corporation - Ucc Technology Park Operations | South Charleston | WV | — | ◇ UNVERIFIED |
| UCUnion Carbide CORP Tucker Latex Plant | Tucker | GA | — | ◇ UNVERIFIED |
| UOUnion Oil CO of Cal | Los Angeles | CA | — | ◇ UNVERIFIED |
| UDUnique Dispensing Systems, LLC | Guilford | CT | — | ◇ UNVERIFIED |
| UDUnique Dispensing Systems, LLC | Guilford | CT | — | ◇ UNVERIFIED |
| UMUnique Machine Main Plant | Anchorage | AK | — | ◇ UNVERIFIED |
| UBUnited Biochemicals LLC | Sanborn | NY | — | ◇ UNVERIFIED |
| UCUnited Catalyst Corporation | Greenville | SC | — | ◇ UNVERIFIED |
| UOUnited Organics CORP | Williamston | NC | — | ◇ UNVERIFIED |
| URUnited Resins INC | Pittsgrove Township | NJ | — | ◇ UNVERIFIED |
| URUnited R.t.m., INC. | Los Angeles | CA | — | ◇ UNVERIFIED |
| USUnited Security Product INC | Poway | CA | — | ◇ UNVERIFIED |
| USUnited States Doe - Savannah River Site Managed and Operated By Srns, LLC | Aiken | SC | — | ◇ UNVERIFIED |
| USUnites States Coastguard Ca | San Pedro | CA | — | ◇ UNVERIFIED |
| USUnivar Solutions Usa, LLC | Charlotte | NC | — | ◇ UNVERIFIED |
| UBUniversal Bioenergy of North America INC | Nettleton | MS | — | ◇ UNVERIFIED |
| UEUniversal Environmental Services, LLC | Peachtree City | GA | — | ◇ UNVERIFIED |
| UPUniversal Plant Services | Pasadena | TX | — | ◇ UNVERIFIED |
 Universal Plastics - Middlefield (0228000127) | Middlefield | OH | — | ◇ UNVERIFIED |
| USUniversal Scrap Management, LLC. | Lauderhill | FL | — | ◇ UNVERIFIED |
| UOUniversity of Portland | Portland | OR | — | ◇ UNVERIFIED |
| UUnocal | Saugus | CA | — | ◇ UNVERIFIED |
