| CMCabot Microelectronics CORP | Aurora | IL | — | ◇ UNVERIFIED |
| COCadillac Oil Company | Detroit | MI | — | ◇ UNVERIFIED |
 Calgon Carbon Corporation | Blue Lake | CA | — | ◇ UNVERIFIED |
| CCCalgon Corporation Sub Merck and CO | Pasadena | TX | — | ◇ UNVERIFIED |
| CACalifornia Automotive Sealing | Hayward | CA | — | ◇ UNVERIFIED |
| CLCalumet Lubricants CO LP | Burnham | IL | — | ◇ UNVERIFIED |
| CVCam2 Vicksburg Lube Oil Blending Plant | Vicksburg | MS | — | ◇ UNVERIFIED |
| CMCambridge Major Laboratories | Germantown | WI | — | ◇ UNVERIFIED |
| CCCamellia Clnr Svc | Flourtown | PA | — | ◇ UNVERIFIED |
| CCCamo Chemical | Houston | TX | — | ◇ UNVERIFIED |
| CCCandy & CO | Chicago | IL | — | ◇ UNVERIFIED |
| CICantol INC | Philadelphia | PA | — | ◇ UNVERIFIED |
| CCarbolabs | Bethany | CT | — | ◇ UNVERIFIED |
| CCCar Care Pkg, LLC | Indianapolis | IN | — | ◇ UNVERIFIED |
| CHCardinal Health | El Paso | TX | — | ◇ UNVERIFIED |
| CHCardinal Health Presource | El Paso | TX | — | ◇ UNVERIFIED |
| CCCardolite CORP | Newark | NJ | — | ◇ UNVERIFIED |
| CCCar-freshner Corporation | De Witt | IA | — | ◇ UNVERIFIED |
| CHCastrol Heavy Duty Lubricants | Worcester | MA | — | ◇ UNVERIFIED |
| CICastrol Industrial | Los Angeles | CA | — | ◇ UNVERIFIED |
| CICastrol Industrial North America INC | North Aurora | IL | — | ◇ UNVERIFIED |
| CCCayman Chemical CO | State College | PA | — | ◇ UNVERIFIED |
| CIC&c Industrial Oil | Bainbridge | GA | — | ◇ UNVERIFIED |
| CPCci Port Nickel LLC - Port Nickel | Braithwaite | LA | — | ◇ UNVERIFIED |
| CDCei - Douglassville INC | Douglassville | PA | — | ◇ UNVERIFIED |
| CLCelanese Limited | Corpus Christi | TX | — | ◇ UNVERIFIED |
| COCentral Ohio Oil INC | Columbus | OH | — | ◇ UNVERIFIED |
| COCentral Oil & Supply CORP. | Monroe | LA | — | ◇ UNVERIFIED |
| CMCenturion Medical Products Corporation | Salisbury | NC | — | ◇ UNVERIFIED |
| CLCentury Lubricating Oils Incorporated | Kansas City | KS | — | ◇ UNVERIFIED |
| CCCeramed CORP | Lakewood | CO | — | ◇ UNVERIFIED |
| CJCf Jameson | Haverhill | MA | — | ◇ UNVERIFIED |
| CCChampion Chemical CO | Whittier | CA | — | ◇ UNVERIFIED |
| CCChampion Coatings | Houston | TX | — | ◇ UNVERIFIED |
| CBChata Biosystems LLC a Part of Boval CO LP | Loveland | CO | — | ◇ UNVERIFIED |
| CCChem Chrome INC | Schofield | WI | — | ◇ UNVERIFIED |
| CUChemetall Us, INC. | Romulus | MI | — | ◇ UNVERIFIED |
| CSChemical Specialists & Development INC | Baton Rouge | LA | — | ◇ UNVERIFIED |
| CIChemique INC | Moorestown | NJ | — | ◇ UNVERIFIED |
| CChemtool | Rockton | IL | — | ◇ UNVERIFIED |
| CIChemtool INC | Crystal Lake | IL | — | ◇ UNVERIFIED |
| CUChevron USA - Wilson Creek Gas Plt | Meeker | CO | — | ◇ UNVERIFIED |
| COChristenson Oil | Portland | OR | — | ◇ UNVERIFIED |
| CSCindys Signature Clnr & Tailors/abington | Roslyn | PA | — | ◇ UNVERIFIED |
| CPCitgo Petroleum CORP Formerly Cato Oil & Grease CO | Oklahoma City | OK | — | ◇ UNVERIFIED |
| COCity of Laredo Landfill | Laredo | TX | — | ◇ UNVERIFIED |
| COClark Oil & Chemical/cochem INC | Cleveland | OH | — | ◇ UNVERIFIED |
| CAClarkson and Ford Company | Clifton | NJ | — | ◇ UNVERIFIED |
| CFClean Fuel Lakeland, LLC | Lakeland | FL | — | ◇ UNVERIFIED |
| COClean Oil Company LLC | La Porte | IN | — | ◇ UNVERIFIED |
| CHClestra Hauserman INC. Div. of Steelcase | Solon | OH | — | ◇ UNVERIFIED |
| CMClorox Manufacturing Company | Aberdeen | MD | — | ◇ UNVERIFIED |
| CPClorox Product Manufacturing CO. | Cleveland | OH | — | ◇ UNVERIFIED |
| CPClorox Products | Chicago | IL | — | ◇ UNVERIFIED |
| CPClorox Products Mfg CO | Forest Park | GA | — | ◇ UNVERIFIED |
| CSClorox Sales CO | Minooka | IL | — | ◇ UNVERIFIED |
| CUCoim Usa, INC | Paulsboro | NJ | — | ◇ UNVERIFIED |
| CUCommercial Ullman Lubricants CO | Cleveland | OH | — | ◇ UNVERIFIED |
| CLComo Lube & Supplies INC | Duluth | MN | — | ◇ UNVERIFIED |
| CSComposite Structures | Omaha | NE | — | ◇ UNVERIFIED |
| CSConcise Separations | San Jose | CA | — | ◇ UNVERIFIED |
| CPConnoisseurs Products CORP | Woburn | MA | — | ◇ UNVERIFIED |
| CCConsolidated Chemical Works LTD | Chicago | IL | — | ◇ UNVERIFIED |
| CCConsolidated Color | Peabody | MA | — | ◇ UNVERIFIED |
| CFCorteva Freeport Operations | Freeport | TX | — | ◇ UNVERIFIED |
| CFCorteva Freeport Operations | Freeport | TX | — | ◇ UNVERIFIED |
| CICountercrafters INC | Venice | FL | — | ◇ UNVERIFIED |
| CLCovestro LLC | Pittsburgh | PA | — | ◇ UNVERIFIED |
| COCpa Operations, LLC D/b/a/ Lensco | Philadelphia | PA | — | ◇ UNVERIFIED |
| CHCp Hall CO | Bedford Park | IL | — | ◇ UNVERIFIED |
| CPCrawford Plant | Crawford | GA | — | ◇ UNVERIFIED |
| CNCrc No 1 LLC | Morganfield | KY | — | ◇ UNVERIFIED |
| CTCreative Testing Solutions | Saint Petersburg | FL | — | ◇ UNVERIFIED |
| CRCrimson Renewable Energy, LP | Bakersfield | CA | — | ◇ UNVERIFIED |
| CRCri Recycling Service INC | Woodville | WI | — | ◇ UNVERIFIED |
| CTCs Terminals LLC | Norfolk | VA | — | ◇ UNVERIFIED |
| CFCumberland Farms INC No 143746 | Zelienople | PA | — | ◇ UNVERIFIED |
| CECummings Environmental | Memphis | TN | — | ◇ UNVERIFIED |
| CECummings Environmental | Memphis | TN | — | ◇ UNVERIFIED |
| CACustom Aircraft Interiors INC | Lakewood | CA | — | ◇ UNVERIFIED |
| CICustom-pak, INC. | Cleveland | OH | — | ◇ UNVERIFIED |
| CSCvc Specialty Chemicals, INC. - Maple Shade Plant | Maple Shade Twp | NJ | — | ◇ UNVERIFIED |
| CICytec Industries, Willow Island Plant | Belmont | WV | — | ◇ UNVERIFIED |
| CCCytonix Corporation | Beltsville | MD | — | ◇ UNVERIFIED |
| DRDarlington Ridge Farms LLC | Darlington | WI | — | ◇ UNVERIFIED |
| DAD a Stuart CO | Philadelphia | PA | — | ◇ UNVERIFIED |
| DSDa Stuart CO | Chicago | IL | — | ◇ UNVERIFIED |
| DDDavid Downs Company | Cudahy | CA | — | ◇ UNVERIFIED |
| DIDay International Chemical Products Div | Addison | IL | — | ◇ UNVERIFIED |
| DSDdp Specialty Electronic Materials US LLC | Auburn Hills | MI | — | ◇ UNVERIFIED |
| DRDearborn Refining CO | Dearborn | MI | — | ◇ UNVERIFIED |
| DRDelek Renewables LLC | Cleburne | TX | — | ◇ UNVERIFIED |
| DSDel Sol Lc | Salt Lake City | UT | — | ◇ UNVERIFIED |
| DTDelta Trading Ico Crimson Resource Mgmt | Bakersfield | CA | — | ◇ UNVERIFIED |
| DCDetrex CORP Solvent & Env Svc | Melrose Park | IL | — | ◇ UNVERIFIED |
| DSDetroit Salt Company LLC | Anderson | IN | — | ◇ UNVERIFIED |
| DHDiamond Head Oil Refinery Div. | Harrison | NJ | — | ◇ UNVERIFIED |
| DODixon Oil Recycling, INC. | De Smet | SD | — | ◇ UNVERIFIED |
 Dow Silicones Corporation | Auburn | MI | — | ◇ UNVERIFIED |
| DUDreumex USA | York | PA | — | ◇ UNVERIFIED |
