| KBKelman Bottles Llc/glenshaw | Glenshaw | — | ◇ UNVERIFIED |
| KCKinsley Const Inc/w Filler Ensminger & Williams Quarries | York | — | ◇ UNVERIFIED |
| KCKosmos Cement | Neville Island | — | ◇ UNVERIFIED |
| KMKrosaki Magnesita Refractories | York | — | ◇ UNVERIFIED |
| LSLafarge Scully Yard Concrete Plt | Pittsburgh | — | ◇ UNVERIFIED |
| LDLewis Drive in Clnrs/york | York | — | ◇ UNVERIFIED |
| MMMarshwood Manufacturing | Throop | — | ◇ UNVERIFIED |
| MRMeadville Redi Mix I/rt 322 | Meadville | — | ◇ UNVERIFIED |
| MCMellott Co/cedar Hill Quarry | Peach Bottom | — | ◇ UNVERIFIED |
| MPMonarch Precast Concrete CORP | Allentown | — | ◇ UNVERIFIED |
| NFNatl Fuel Gas Supply Corp/henderson Sta | Stoneboro | — | ◇ UNVERIFIED |
| NFNatl Fuel Gas Supply/heath Station | Sigel | — | ◇ UNVERIFIED |
| NFNatl Fuel Gas Supply/knox Station | Brookville | — | ◇ UNVERIFIED |
| NCNesl CO INC Dba Martin Limestone Inc/denver & Kurtz Plt | Denver | — | ◇ UNVERIFIED |
| NCNesl CO INC Dba Martin Limestone Inc/east Earl Weaverland | New Holland | — | ◇ UNVERIFIED |
| NENew Enterprise Stone & Lime CO Inc/fairfield | Cumberland | — | ◇ UNVERIFIED |
| NENew Enterprise Stone & Lime CO Inc/gettysburg | Gettysburg | — | ◇ UNVERIFIED |
| NENew Enterprise Stone & Lime CO Inc/maxatawny | Kutztown | — | ◇ UNVERIFIED |
| NINicolet Ind/ambler | Ambler | — | ◇ UNVERIFIED |
| NCNitterhouse Concrete Precast Plt | Chambersburg | — | ◇ UNVERIFIED |
| NNNortheast Nanticoke Facility | Nanticoke | — | ◇ UNVERIFIED |
| OAOldcastle Apg Natl I/emigsville | Emigsville | — | ◇ UNVERIFIED |
| OPOldcastle Precast | Easton | — | ◇ UNVERIFIED |
| OPOldcastle Precast INC | Morrisville | — | ◇ UNVERIFIED |
| OSOsram Sylvania INC | Wellsboro | — | ◇ UNVERIFIED |
| OTO Tex Pumping Fenelton | Fenelton | — | ◇ UNVERIFIED |
| OGOwens-brockway Glass/clarion | Clarion | — | ◇ UNVERIFIED |
| PAPcr Aquisitions Dba Campania Intl Inc/quakertown | Quakertown | — | ◇ UNVERIFIED |
| PWPenn-mar Wilbert | York | — | ◇ UNVERIFIED |
| PRPenn Rock Aggregates | North Versailles | — | ◇ UNVERIFIED |
| PSPennsy Supply INC Paxton St Ready Mix | Harrisburg | — | ◇ UNVERIFIED |
| PSPennsy Supply Summit Sta/quarry Wayne Twp | Summit Station | — | ◇ UNVERIFIED |
| PCPfaltzgraff CO - Thomasville Facility | Thomasville | — | ◇ UNVERIFIED |
| PCPgh Corning Corp/port Allegany | Port Allegany | — | ◇ UNVERIFIED |
| PFPgh Flexicore/donora Plt | Donora | — | ◇ UNVERIFIED |
| PGPgh Glass Works | Creighton | — | ◇ UNVERIFIED |
| PGPgh Glass Works Llc/works 27 Tipton | Tipton | — | ◇ UNVERIFIED |
| PTPilkington Technical Mirror | Brackenridge | — | ◇ UNVERIFIED |
| PFPittston Facility | Pittston | — | ◇ UNVERIFIED |
| PIPpg Ind Greensburg Div | Greensburg | — | ◇ UNVERIFIED |
| PMPremier Magnesia LLC Aspers Plant | Aspers | — | ◇ UNVERIFIED |
| PCPyrotek Carlisle Nonclay Refractory Mfg | Carlisle | — | ◇ UNVERIFIED |
| PIPyrotek INC | Carlisle | — | ◇ UNVERIFIED |
| QHQuikrete - Harrisburg, Pa Plant | Paxinos | — | ◇ UNVERIFIED |
| QPQuikrete - Pittsburgh, Pa Plant | Latrobe | — | ◇ UNVERIFIED |
| RCRahns Concrete Batch Plant | Rahns | — | ◇ UNVERIFIED |
| RPRinker Pittsburgh Pipe | Oakdale | — | ◇ UNVERIFIED |
| SCSaint-gobain Ceramics/latrobe Plt | Latrobe | — | ◇ UNVERIFIED |
| SMSchaffner Mfg CO INC | Pittsburgh | — | ◇ UNVERIFIED |
| STSeparation Technologies LLC | York Haven | — | ◇ UNVERIFIED |
