| MMMarshwood Manufacturing | Throop | PA | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| MRMeadville Redi Mix I/rt 322 | Meadville | PA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| MCMellott Co/cedar Hill Quarry | Peach Bottom | PA | Nonmetallic Mineral Product Manufacturing327992 | — | ◇ UNVERIFIED |
| MPMonarch Precast Concrete CORP | Allentown | PA | Nonmetallic Mineral Product Manufacturing327390 | — | ◇ UNVERIFIED |
| NFNatl Fuel Gas Supply Corp/henderson Sta | Stoneboro | PA | Nonmetallic Mineral Product Manufacturing327420 | — | ◇ UNVERIFIED |
| NFNatl Fuel Gas Supply/heath Station | Sigel | PA | Nonmetallic Mineral Product Manufacturing327410 | — | ◇ UNVERIFIED |
| NFNatl Fuel Gas Supply/knox Station | Brookville | PA | Nonmetallic Mineral Product Manufacturing327390 | — | ◇ UNVERIFIED |
| NCNesl CO INC Dba Martin Limestone Inc/denver & Kurtz Plt | Denver | PA | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| NCNesl CO INC Dba Martin Limestone Inc/east Earl Weaverland | New Holland | PA | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| NENew Enterprise Stone & Lime CO Inc/fairfield | Cumberland | PA | Nonmetallic Mineral Product Manufacturing327992 | — | ◇ UNVERIFIED |
| NENew Enterprise Stone & Lime CO Inc/gettysburg | Gettysburg | PA | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| NENew Enterprise Stone & Lime CO Inc/maxatawny | Kutztown | PA | Nonmetallic Mineral Product Manufacturing327992 | — | ◇ UNVERIFIED |
| NINicolet Ind/ambler | Ambler | PA | Nonmetallic Mineral Product Manufacturing327999 | — | ◇ UNVERIFIED |
| NCNitterhouse Concrete Precast Plt | Chambersburg | PA | Nonmetallic Mineral Product Manufacturing327390 | — | ◇ UNVERIFIED |
| NNNortheast Nanticoke Facility | Nanticoke | PA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| OAOldcastle Apg Natl I/emigsville | Emigsville | PA | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| OPOldcastle Precast | Easton | PA | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| OPOldcastle Precast INC | Morrisville | PA | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| OSOsram Sylvania INC | Wellsboro | PA | Nonmetallic Mineral Product Manufacturing327212 | — | ◇ UNVERIFIED |
| OTO Tex Pumping Fenelton | Fenelton | PA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| OGOwens-brockway Glass/clarion | Clarion | PA | Nonmetallic Mineral Product Manufacturing327213 | — | ◇ UNVERIFIED |
| PAPcr Aquisitions Dba Campania Intl Inc/quakertown | Quakertown | PA | Nonmetallic Mineral Product Manufacturing327390 | — | ◇ UNVERIFIED |
| PWPenn-mar Wilbert | York | PA | Nonmetallic Mineral Product Manufacturing327390 | — | ◇ UNVERIFIED |
| PRPenn Rock Aggregates | North Versailles | PA | Nonmetallic Mineral Product Manufacturing327992 | — | ◇ UNVERIFIED |
| PSPennsy Supply INC Paxton St Ready Mix | Harrisburg | PA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| PSPennsy Supply Summit Sta/quarry Wayne Twp | Summit Station | PA | Nonmetallic Mineral Product Manufacturing327992 | — | ◇ UNVERIFIED |
| PCPfaltzgraff CO - Thomasville Facility | Thomasville | PA | Nonmetallic Mineral Product Manufacturing327112 | — | ◇ UNVERIFIED |
| PCPgh Corning Corp/port Allegany | Port Allegany | PA | Nonmetallic Mineral Product Manufacturing327100 | — | ◇ UNVERIFIED |
| PFPgh Flexicore/donora Plt | Donora | PA | Nonmetallic Mineral Product Manufacturing327390 | — | ◇ UNVERIFIED |
| PGPgh Glass Works | Creighton | PA | Nonmetallic Mineral Product Manufacturing327215 | — | ◇ UNVERIFIED |
| PGPgh Glass Works Llc/works 27 Tipton | Tipton | PA | Nonmetallic Mineral Product Manufacturing327215 | — | ◇ UNVERIFIED |
| PTPilkington Technical Mirror | Brackenridge | PA | Nonmetallic Mineral Product Manufacturing327215 | — | ◇ UNVERIFIED |
| PFPittston Facility | Pittston | PA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| PIPpg Ind Greensburg Div | Greensburg | PA | Nonmetallic Mineral Product Manufacturing327215 | — | ◇ UNVERIFIED |
| PMPremier Magnesia LLC Aspers Plant | Aspers | PA | Nonmetallic Mineral Product Manufacturing327992 | — | ◇ UNVERIFIED |
| PCPyrotek Carlisle Nonclay Refractory Mfg | Carlisle | PA | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| PIPyrotek INC | Carlisle | PA | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| QHQuikrete - Harrisburg, Pa Plant | Paxinos | PA | Nonmetallic Mineral Product Manufacturing327999 | — | ◇ UNVERIFIED |
| QPQuikrete - Pittsburgh, Pa Plant | Latrobe | PA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| RCRahns Concrete Batch Plant | Rahns | PA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| RPRinker Pittsburgh Pipe | Oakdale | PA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| SCSaint-gobain Ceramics/latrobe Plt | Latrobe | PA | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| SMSchaffner Mfg CO INC | Pittsburgh | PA | Nonmetallic Mineral Product Manufacturing327910 | — | ◇ UNVERIFIED |
| STSeparation Technologies LLC | York Haven | PA | Nonmetallic Mineral Product Manufacturing327999 | — | ◇ UNVERIFIED |
| SIServsteel Inc/morgan | Morgan | PA | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| SCSharon Concrete Batch Plt | Sharon | PA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| SSSheridan Supply CO - Newmanstown | Newmanstown | PA | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| SDShermans Dale Station | Shermans Dale | PA | Nonmetallic Mineral Product Manufacturing327100 | — | ◇ UNVERIFIED |
| SCSpang & Co/magnetics Div | Butler | PA | Nonmetallic Mineral Product Manufacturing327212 | — | ◇ UNVERIFIED |
| SISpinworks International CORP | North East | PA | Nonmetallic Mineral Product Manufacturing327110 | — | ◇ UNVERIFIED |