| PCParamelt CORP | Rosemead | CA | — | ◇ UNVERIFIED |
| PPPeerless Products | Fort Scott | KS | — | ◇ UNVERIFIED |
| PSPennzoil-quaker State CO (dba Sopus Products Lalp) | Wilmington | CA | — | ◇ UNVERIFIED |
| PSPennzoil-quaker State (dba Sopus Products) | Newell | WV | — | ◇ UNVERIFIED |
| PPPerkins Products INC | Bedford Park | IL | — | ◇ UNVERIFIED |
| PDPetrochoice Dynamo, LLC | Indianapolis | IN | — | ◇ UNVERIFIED |
| PSPetroclean Solutions LLC | Farmerville | LA | — | ◇ UNVERIFIED |
| PCPetrolite CORP Bakersfield Blend Plant | Bakersfield | CA | — | ◇ UNVERIFIED |
| P6Phillips 66 Company | Hartford | IL | — | ◇ UNVERIFIED |
| P6Phillips 66 - Los Angeles Terminal and Lubes Plant | Los Angeles | CA | — | ◇ UNVERIFIED |
| P6Phillips 66 Pipeline Portland Terminal & Lubricants | Portland | OR | — | ◇ UNVERIFIED |
| P6Phillips 66 Savannah Lubricants Terminal | Savannah | GA | — | ◇ UNVERIFIED |
| P6Phillips 66 Spectrum CORP. Selmer Lubricants Plant | Selmer | TN | — | ◇ UNVERIFIED |
| PCPico Chemical CORP | Chicago Heights | IL | — | ◇ UNVERIFIED |
| PIPlating International INC | Franklin Park | IL | — | ◇ UNVERIFIED |
| PIPlaze INC | Saint Clair | MO | — | ◇ UNVERIFIED |
| PCPlz CORP | Bridgeview | IL | — | ◇ UNVERIFIED |
| PIPolychemie INC | Pearlington | MS | — | ◇ UNVERIFIED |
| PIPolychemie INC. - Wayne, Mi | Wayne | MI | — | ◇ UNVERIFIED |
| PIPolymerics INC | Kent | OH | — | ◇ UNVERIFIED |
| PDPolyventive ? Dalton South | Dalton | GA | — | ◇ UNVERIFIED |
| PLPolyventive, LLC | Calhoun | GA | — | ◇ UNVERIFIED |
| PAPort Allen Plant | Port Allen | LA | — | ◇ UNVERIFIED |
| PFPort Fourchon North | Golden Meadow | LA | — | ◇ UNVERIFIED |
| PEPpg Euclid Pretreatment & Specialty Prods | Euclid | OH | — | ◇ UNVERIFIED |
| PIProchemco INC. | Lake Station | IN | — | ◇ UNVERIFIED |
| PWProchem Water LLC | Elliston | VA | — | ◇ UNVERIFIED |
| PAPsc Allworth - Birmingham Facility | Birmingham | AL | — | ◇ UNVERIFIED |
| PTPurcell Tire and Service Center | Anchorage | AK | — | ◇ UNVERIFIED |
| QHQuacker Houghton | Detroit | MI | — | ◇ UNVERIFIED |
| QCQuaker Chemical CORP | Middletown | OH | — | ◇ UNVERIFIED |
| QHQuaker Houghton Pa INC | Carrollton | GA | — | ◇ UNVERIFIED |
 Qualichem, INC. | Salem | VA | — | ◇ UNVERIFIED |
 Ques Industries INC | Cleveland | OH | — | ◇ UNVERIFIED |
| RSRefinery Specialties Hempstead Facility | Hempstead | TX | — | ◇ UNVERIFIED |
| RPRemet Pic INC | Utica | NY | — | ◇ UNVERIFIED |
| RCRevlis CORP | Akron | OH | — | ◇ UNVERIFIED |
| RCRevlis Corporation | Akron | OH | — | ◇ UNVERIFIED |
| RCRhein Chemie CORP | Chardon | OH | — | ◇ UNVERIFIED |
| RARichards Apex Inc/lube Mfg Plt | Philadelphia | PA | — | ◇ UNVERIFIED |
| RRilco | Rock Island | IL | — | ◇ UNVERIFIED |
| RIRock Island Lubricants Company | Moline | IL | — | ◇ UNVERIFIED |
| RIRock Island Lubricants CORP INC | Rock Island | IL | — | ◇ UNVERIFIED |
| RVRock Valley Oil & Chemical CO | Rockford | IL | — | ◇ UNVERIFIED |
| RWRollie Williams Paint Spot INC | Elkhart | IN | — | ◇ UNVERIFIED |
| RSRossborough Supply Src Div | Cleveland | OH | — | ◇ UNVERIFIED |
| SCSafety-kleen CORP INC - Davenport Facility | Davenport | IA | — | ◇ UNVERIFIED |
| SSSafety-kleen Systems | Cranston | RI | — | ◇ UNVERIFIED |
| SSSafety-kleen Systems -510301 | Minneapolis | MN | — | ◇ UNVERIFIED |
| SKSafety Kleen Systems INC | Des Moines | IA | — | ◇ UNVERIFIED |
