| OCOccidental Chemical Corporation Oxychem | New Johnsonville | TN | — | ◇ UNVERIFIED |
| OCOccidental Chemical CORP - Taft Plant | Hahnville | LA | — | ◇ UNVERIFIED |
| OBOld Bridge Chemiacls INC | Old Bridge | NJ | — | ◇ UNVERIFIED |
| OCOlin Chlor Alkali Products | Niagara Falls | NY | — | ◇ UNVERIFIED |
| OOOmni Oxide Indiana Oxide | Brazil | IN | — | ◇ UNVERIFIED |
| PGPaducah Gaseous Diffusion Plant | Paducah | KY | — | ◇ UNVERIFIED |
| PCPalm Commodities International | La Vergne | TN | — | ◇ UNVERIFIED |
| PNPcs Nitrogen Fertilizer LP - Geismar Agricultural Nitrogen & Phosphate Plant | Geismar | LA | — | ◇ UNVERIFIED |
| PSPeach State Labs, LLC | Rome | GA | — | ◇ UNVERIFIED |
| PCPeninsula Copper Industries INC | Hubbell | MI | — | ◇ UNVERIFIED |
| PMPeterson Manufacturing and Engineering Facility | Fort Smith | AR | — | ◇ UNVERIFIED |
| PAPioneer Americas LLC D/b/a/ Olin Chlor Alkali | Saint Gabriel | LA | — | ◇ UNVERIFIED |
| PAPioneer Americas LLC Dba Olin Chlor Alkali Products | Henderson | NV | — | ◇ UNVERIFIED |
| PAPioneer Americas LLC (dba Olin Chlor Alkali Products Sfs) | Santa Fe Springs | CA | — | ◇ UNVERIFIED |
| PPowerlab | Terrell | TX | — | ◇ UNVERIFIED |
| PSPraxair Specialty Ceramics | Woodinville | WA | — | ◇ UNVERIFIED |
| PMPrince Minerals LLC | Milwaukee | WI | — | ◇ UNVERIFIED |
| PCPvs Chemical, INC. | Chicago | IL | — | ◇ UNVERIFIED |
| PCPvs Chemicals Formerly Dpc Enterprises, L.p. | Mobile | AL | — | ◇ UNVERIFIED |
| PSPvs Steel Services INC | Burns Harbor | IN | — | ◇ UNVERIFIED |
| PTPvs Tech INC | Detroit | MI | — | ◇ UNVERIFIED |
| PTPvs Technologies, INC. (augusta) | Augusta | GA | — | ◇ UNVERIFIED |
| RSResin Solutions, LLC | Chatom | AL | — | ◇ UNVERIFIED |
| RIRhodia INC. - Dominguez Plant | Carson | CA | — | ◇ UNVERIFIED |
| RJR J Marshall CO | Erie | MI | — | ◇ UNVERIFIED |
| RLRockwood Lithium INC | Kings Mountain | NC | — | ◇ UNVERIFIED |
| RLRockwood Lithium INC | Silverpeak | NV | — | ◇ UNVERIFIED |
| RMRoyal Metal Powders, INC. | Maryville | TN | — | ◇ UNVERIFIED |
| RLRuveon LLC | Soda Springs | ID | — | ◇ UNVERIFIED |
| SCSachs Chemical, INC. | Caguas | PR | — | ◇ UNVERIFIED |
| SDScientific Design CO INC | Little Ferry | NJ | — | ◇ UNVERIFIED |
| SISeeler Industries INC | Joliet | IL | — | ◇ UNVERIFIED |
| SGSeparations Group Grace Vydac | Hesperia | CA | — | ◇ UNVERIFIED |
| SCShell Catalysts and Technologies L.p. | Port Allen | LA | — | ◇ UNVERIFIED |
| SMShepherd Middletown Company | Middletown | OH | — | ◇ UNVERIFIED |
| SRSid Richardson Carbon CO | Borger | TX | — | ◇ UNVERIFIED |
| SISolutia INC Krummrich Il (part) | Sauget | IL | — | ◇ UNVERIFIED |
| SUSolvay USA INC | Cincinnati | OH | — | ◇ UNVERIFIED |
| SUSolvay USA INC | Martinez | CA | — | ◇ UNVERIFIED |
| SUSolvay USA Inc.-silver Bow Plant | Silver Bow | MT | — | ◇ UNVERIFIED |
 Southern Ionics INC | Sulphur | LA | — | ◇ UNVERIFIED |
 Southern States Phosphate & Fe Rtilizer CO | Savannah | GA | — | ◇ UNVERIFIED |
| SCSpecialty Chemical Systems, INC | Pottstown | PA | — | ◇ UNVERIFIED |
| SMSpecialty Minerals Dolomite Plant | Canaan | CT | — | ◇ UNVERIFIED |
| SCSud-chemie Chemical Plant | Louisville | KY | — | ◇ UNVERIFIED |
| SLSulfco, LLC | Savannah | GA | — | ◇ UNVERIFIED |
| SSSyensqo Specialty Polymers USA LLC | Marietta | OH | — | ◇ UNVERIFIED |
 Syngenta Crop Protection, LLC. - St Gabriel Plant | Saint Gabriel | LA | — | ◇ UNVERIFIED |
| TLTate & Lyle Sucralose INC | Mc Intosh | AL | — | ◇ UNVERIFIED |
| TLTdc Llc-corpus Christi Plant | Corpus Christi | TX | — | ◇ UNVERIFIED |
