| NCNalco Chemical CO. | Paulsboro | NJ | — | ◇ UNVERIFIED |
| NINational Interchem CORP | Chicago | IL | — | ◇ UNVERIFIED |
| NPNational Peening Incorporated | Salem | VA | — | ◇ UNVERIFIED |
| NTNational Trail Biodiesel Group LLC | Newton | IL | — | ◇ UNVERIFIED |
| NSNeel Schaffer Inc, Jitney Jr Number 617 | Tchula | MS | — | ◇ UNVERIFIED |
| NBNelson Biotechnologies INC | Flagstaff | AZ | — | ◇ UNVERIFIED |
| NTNeograft Technologies | Taunton | MA | — | ◇ UNVERIFIED |
| NENew Eden Energy LLC | Saint Cloud | FL | — | ◇ UNVERIFIED |
| NYNewport Yacht Basin | Bellevue | WA | — | ◇ UNVERIFIED |
| NDNext Diesel | Adrian | MI | — | ◇ UNVERIFIED |
| NCNorth Charleston Distribution Terminal | Charleston | WV | — | ◇ UNVERIFIED |
| NPNorthwestern Plating Works | Chicago | IL | — | ◇ UNVERIFIED |
| NCNottingham Company | Atlanta | GA | — | ◇ UNVERIFIED |
| NFNouryon Functional Chemicals Burt Plant | Burt | NY | — | ◇ UNVERIFIED |
| NPNouryon Pulp & Performance Chemicals | Duluth | GA | — | ◇ UNVERIFIED |
| NPNova Pressroom Products | Jacksonville | FL | — | ◇ UNVERIFIED |
| NBNovozymes Biologicals INC - South Broad Street | Salem | VA | — | ◇ UNVERIFIED |
| NINuset Industries, Orrco, 02 Bl (nuseti) | Salt Lake City | UT | — | ◇ UNVERIFIED |
| NBNutrition & Biosciences USA 1 LLC - Plaquemine Methocel | Plaquemine | LA | — | ◇ UNVERIFIED |
| NANy Army National Guard, Army Aviation Support Facility #1 | Islip | NY | — | ◇ UNVERIFIED |
| OFOberon Fuels Kershaw Facility | Brawley | CA | — | ◇ UNVERIFIED |
| OObiter | Champaign | IL | — | ◇ UNVERIFIED |
| OCOccidental Chemical CORP Sauget Plant | Sauget | IL | — | ◇ UNVERIFIED |
| OCOceanside City of Water Utilities Dept/slrwwtp | Oceanside | CA | — | ◇ UNVERIFIED |
| OCOil Chem INC | Flint | MI | — | ◇ UNVERIFIED |
| OROil Recovery INC | Camilla | GA | — | ◇ UNVERIFIED |
| OROil Re Refining CO INC - Kennewick Facility | Kennewick | WA | — | ◇ UNVERIFIED |
| OPOlympic Petroleum Corporation | Cicero | IL | — | ◇ UNVERIFIED |
| OTOmaha Transloading Corporation | Omaha | NE | — | ◇ UNVERIFIED |
| OEOmg Electronic Chemicals LLC | Newark | NJ | — | ◇ UNVERIFIED |
| OIOptical Integrity INC | Panama City Beach | FL | — | ◇ UNVERIFIED |
 Organic Dyes and Pigments | Providence | RI | — | ◇ UNVERIFIED |
| OFOrganic Filling Solutions LLC | Chatsworth | CA | — | ◇ UNVERIFIED |
| OCOrg Chem Group LLC | Evansville | IN | — | ◇ UNVERIFIED |
| OBOsprey Biotechnics | Sarasota | FL | — | ◇ UNVERIFIED |
| OHOttobock Healthcare, LP | Louisville | KY | — | ◇ UNVERIFIED |
| OCOverdale CORP | Alsip | IL | — | ◇ UNVERIFIED |
| PBPacific Biodiesel INC | Kahului | HI | — | ◇ UNVERIFIED |
| PEPacific Environmental Resources INC | Santa Rita | GU | — | ◇ UNVERIFIED |
| PPPacific Precision Formulators INC | Vernon | CA | — | ◇ UNVERIFIED |
| PEPampa Energy Center | Pampa | TX | — | ◇ UNVERIFIED |
| PSParker Solvents Company, INC. | Little Rock | AR | — | ◇ UNVERIFIED |
| PIPark International Corporation | Long Beach | CA | — | ◇ UNVERIFIED |
| PCParts Cleaning Technologies LLC | Indianapolis | IN | — | ◇ UNVERIFIED |
| PBP. B. Fiberglass Products INC | Sun Valley | CA | — | ◇ UNVERIFIED |
| PMPdq Manufacturing, INC. | Ellijay | GA | — | ◇ UNVERIFIED |
| PMPeck Marine Terminal | Chesapeake | VA | — | ◇ UNVERIFIED |
| PEPe Ell Hulk Hauling | Aberdeen | WA | — | ◇ UNVERIFIED |
| PSPennzoil-quaker State CO (dba Sopus Products Lalp) | Wilmington | CA | — | ◇ UNVERIFIED |
| PSPennzoil-quaker State Company (dba Sopus Products) (no Longer Subject to Frp) | Maryland Heights | MO | — | ◇ UNVERIFIED |
| PQPennzoil Quaker-state CO. Sopus Products | Tehachapi | CA | — | ◇ UNVERIFIED |
| PSPennzoil-quaker State (dba Sopus Products) | Newell | WV | — | ◇ UNVERIFIED |
| PSPennzoil-quaker State Dba Sopus Products | Fowlerville | MI | — | ◇ UNVERIFIED |
| PQPennzoil Quaker State - Valley View Pack | Shreveport | LA | — | ◇ UNVERIFIED |
| PCPenray Companies | Elk Grove Village | IL | — | ◇ UNVERIFIED |
| PCPerformance Composites INC Fi | Torrance | CA | — | ◇ UNVERIFIED |
| PRPetra Research INC | Alachua | FL | — | ◇ UNVERIFIED |
| PDPetrochoice Dynamo, LLC | Indianapolis | IN | — | ◇ UNVERIFIED |
| PRPetroleum Recycling CORP | Philadelphia | PA | — | ◇ UNVERIFIED |
| PSPetroleum Service Consultant LLC | Medley | FL | — | ◇ UNVERIFIED |
| PBPflaumer Brothers | Ewing | NJ | — | ◇ UNVERIFIED |
| PIPha Industries | Orange | MA | — | ◇ UNVERIFIED |
| PIPharmasyn INC | Libertyville | IL | — | ◇ UNVERIFIED |
| PIPharmatech International INC | Fairfield | NJ | — | ◇ UNVERIFIED |
| PSPhilip Services Hawaii LTD (allwaste) - Oil Recycling Plant | Kapolei | HI | — | ◇ UNVERIFIED |
| PLPiedmont LLC | Gainesville | GA | — | ◇ UNVERIFIED |
| PRPine Ridge Transportation | Tanner | AL | — | ◇ UNVERIFIED |
| PPPitt Penn Recycling LLC | Creighton | PA | — | ◇ UNVERIFIED |
| PIPlexmar Incorporated | Houston | TX | — | ◇ UNVERIFIED |
| PIPolarome International | Newark | NJ | — | ◇ UNVERIFIED |
| PCPolo Cleaners 2 | Middletown | RI | — | ◇ UNVERIFIED |
 Polycarbon Industries INC | Ayer | MA | — | ◇ UNVERIFIED |
| PSPolychem Services Inc., LLC | Chicago Heights | IL | — | ◇ UNVERIFIED |
| PIPoly-med INC | Anderson | SC | — | ◇ UNVERIFIED |
| PAPolymer Additives - Cleveland Plant | Cleveland | OH | — | ◇ UNVERIFIED |
| PCPolymerine CO INC | New Bedford | MA | — | ◇ UNVERIFIED |
| PLPolymerine LTD | New Bedford, City of | MA | — | ◇ UNVERIFIED |
| PSPoly Scientific | Bay Shore | NY | — | ◇ UNVERIFIED |
| PLPolyventive, LLC | Calhoun | GA | — | ◇ UNVERIFIED |
| PPPorphyrin Products | Logan | UT | — | ◇ UNVERIFIED |
| PAPort Arthur Plant | Port Arthur | TX | — | ◇ UNVERIFIED |
| PIPpg Industries Inc/lake Charles Complex | Lake Charles | LA | — | ◇ UNVERIFIED |
| PCPremier Chemical Technologies | Lafayette | LA | — | ◇ UNVERIFIED |
| PEPride Enterprises Aci Sanitary Maint & Supply | Sneads | FL | — | ◇ UNVERIFIED |
| PIProchemco INC. | Lake Station | IN | — | ◇ UNVERIFIED |
| PSProfrac Svcs LLC Smithfield Fac | Smithfield | PA | — | ◇ UNVERIFIED |
| PLPromerus LLC | Brecksville | OH | — | ◇ UNVERIFIED |
| PAProviron America INC | Friendly | WV | — | ◇ UNVERIFIED |
| PFPuraglobe Florida LLC | Tampa | FL | — | ◇ UNVERIFIED |
| QCQuaker Chemical CORP. | Detroit | MI | — | ◇ UNVERIFIED |
| QHQuaker Houghton | Strongsville | OH | — | ◇ UNVERIFIED |
| QCQuality Car Care Products INC | Duarte | CA | — | ◇ UNVERIFIED |
| QPQuapaw Products | Helena | AR | — | ◇ UNVERIFIED |
| QAQuest Automotive Products | Gnadenhutten | OH | — | ◇ UNVERIFIED |
| RCRaj Chemicals Americas LLC | Somerville | NJ | — | ◇ UNVERIFIED |
| RCRaschig Corporation | Richmond | VA | — | ◇ UNVERIFIED |
| RERational Energies Hc INC - Plymouth Facility | Plymouth | MN | — | ◇ UNVERIFIED |
| RCRaybo Chemical CO | Huntington | WV | — | ◇ UNVERIFIED |
| RARaytheon Aircraft Co(was Beech Aircraft) | Boulder | CO | — | ◇ UNVERIFIED |
| RBReckitt & Benckiser INC | Wayne | NJ | — | ◇ UNVERIFIED |
