| CTCascades Tissue Group Pa INC Ransom Mill | Ransom | PA | Paper Manufacturing322110 | — | ◇ UNVERIFIED |
| CPCaskey Printing INC | York | PA | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
| CBCastle Bldr Supply New Castle | New Castle | PA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CRCastle Rubber Mfg | East Butler | PA | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| CICatalyst International/gasket Materials CORP. | Philadelphia | PA | Textile Mills313320 | — | ◇ UNVERIFIED |
| CLCatawissa Lumber & Specialty/catawissa Plt | Catawissa | PA | Wood Product Manufacturing321912 | — | ◇ UNVERIFIED |
| CGCaterpillar Global Mining Amer Llc/houston | Houston | PA | Machinery Manufacturing333131 | — | ◇ UNVERIFIED |
| CWCavert Wire | Lemont Furnace | PA | Primary Metal Manufacturing331222 | — | ◇ UNVERIFIED |
| CCCayman Chemical CO | State College | PA | Chemical Manufacturing325199 | — | ◇ UNVERIFIED |
| CWCb&i Water/warren Facility | Warren | PA | Fabricated Metal Product Manufacturing332313 | — | ◇ UNVERIFIED |
| CSCbs Sharon Groundwater Remediation | Sharon | PA | Electrical Equipment, Appliance & Component Manufacturing335311 | — | ◇ UNVERIFIED |
| CICcf Industries Inc/apollo | Apollo | PA | Wood Product Manufacturing321999 | — | ◇ UNVERIFIED |
| CTCcl Tube | Wilkes Barre | PA | Plastics and Rubber Products Manufacturing326160 | — | ◇ UNVERIFIED |
| CDC & D Tech | Leola | PA | Electrical Equipment, Appliance & Component Manufacturing335910 | — | ◇ UNVERIFIED |
| CCegelec | Canonsburg | PA | Machinery Manufacturing333319 | — | ◇ UNVERIFIED |
| CDCei - Douglassville INC | Douglassville | PA | Chemical Manufacturing325612 | — | ◇ UNVERIFIED |
| CHCemcolift Hatfield Fac | Hatfield | PA | Machinery Manufacturing333921 | — | ◇ UNVERIFIED |
| CMCenterville Martinizing Clnrs | Lancaster | PA | Computer and Electronic Product Manufacturing334300 | — | ◇ UNVERIFIED |
| CHCentral Hydraulics INC | East Freedom | PA | Fabricated Metal Product Manufacturing332912 | — | ◇ UNVERIFIED |
| CCCentre Concrete CO State College Plt | State College | PA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CCCentre Concrete State College Plt | State College | PA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CCentria | Ambridge | PA | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| CCCentury Cabinetry | Exton | PA | Furniture and Related Product Manufacturing337110 | — | ◇ UNVERIFIED |
| CCCeraln Corp/south Williamsport Plt | South Williamsport | PA | Furniture and Related Product Manufacturing337127 | — | ◇ UNVERIFIED |
| CCCeramic Color & Chem Mfg CO Plt | New Brighton | PA | Chemical Manufacturing325180 | — | ◇ UNVERIFIED |
| CUCeratizit Usa/latrobe Plt | Latrobe | PA | Machinery Manufacturing333517 | — | ◇ UNVERIFIED |
| CMCertainteed - Mountaintop Facility | Mountain Top | PA | Nonmetallic Mineral Product Manufacturing327993 | — | ◇ UNVERIFIED |
| CHChampion Home Bldr Inc/liverpool Plt 41 | Liverpool | PA | Wood Product Manufacturing321992 | — | ◇ UNVERIFIED |
| CMChampion Modular Homes Plant 41 | Liverpool | PA | Wood Product Manufacturing321991 | — | ◇ UNVERIFIED |
| CPChampion Parts Bldrs | Lock Haven | PA | Transportation Equipment Manufacturing336399 | — | ◇ UNVERIFIED |
| CPChampion Parts INC | Beech Creek | PA | Transportation Equipment Manufacturing336000 | — | ◇ UNVERIFIED |
| CEChem Equip Labs Inc/marcus Hook | Marcus Hook | PA | Machinery Manufacturing333318 | — | ◇ UNVERIFIED |
| CPChemstation Philadelphia | Phillipsburg | PA | Chemical Manufacturing325611 | — | ◇ UNVERIFIED |
| CIChemstream INC | Stoystown | PA | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| CAChep-millwood Allentown Service Center | Alburtis | PA | Wood Product Manufacturing321920 | — | ◇ UNVERIFIED |
| CMChevron Molycorp Washington Remediation Proj | Washington | PA | Primary Metal Manufacturing331000 | — | ◇ UNVERIFIED |
| CLChristiana Laundry | Christiana | PA | Computer and Electronic Product Manufacturing334220 | — | ◇ UNVERIFIED |
| CSCindys Signature Clnr & Tailors/abington | Roslyn | PA | Chemical Manufacturing325199 | — | ◇ UNVERIFIED |
| COCity of Pittsburgh Asphalt Plant | Pittsburgh | PA | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| CICke INC | Lucernemines | PA | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| CSClairton Shipyard | Clairton | PA | Transportation Equipment Manufacturing336611 | — | ◇ UNVERIFIED |
| CSClairton Slag Inc/west Elizabeth Paving Matl Plt | West Elizabeth | PA | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| CCClariant CORP Kion Facility | Huntingdon Valley | PA | Chemical Manufacturing325180 | — | ◇ UNVERIFIED |
| CMClark Metal Prod CO | Blairsville | PA | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| CPClassic Pistol | Southampton | PA | Fabricated Metal Product Manufacturing332992 | — | ◇ UNVERIFIED |
| CEClean Enterprises | Quarryville | PA | Computer and Electronic Product Manufacturing334290 | — | ◇ UNVERIFIED |
| CMClearfield Mach Co/3rd & Everett Streets | Clearfield | PA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| CSClearview Structural Steel Souderton Plt | Souderton | PA | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| CIClearwater INC. | Pittsburgh | PA | Chemical Manufacturing325188 | — | ◇ UNVERIFIED |
| CLCloister Laundry Dry Cleaners | Ephrata | PA | Computer and Electronic Product Manufacturing334416 | — | ◇ UNVERIFIED |
