| PHPinnacle Health/harrisburg Hosp | Harrisburg | — | ◐ LIKELY ACTIVE |
| PIPotters Industries LLC | Malvern | — | ◐ LIKELY ACTIVE |
| PIPureon Inc/fayette Business Pk | Smithfield | — | ◐ LIKELY ACTIVE |
| RRRmci Refractory/west Grove | West Grove | — | ◐ LIKELY ACTIVE |
| RQRohrers Quarry/lititz | Lititz | — | ◐ LIKELY ACTIVE |
| SPServall Plant/erie | Erie | — | ◐ LIKELY ACTIVE |
| SCSilbrico Corp/easton | Forks Township | — | ◐ LIKELY ACTIVE |
| SSS&k Stone Incorporated | Meshoppen | — | ◐ LIKELY ACTIVE |
| SRSmyrna Ready Mix Concrete/shenango Twp | W. Middlesex | — | ◐ LIKELY ACTIVE |
| SASquibb, Alvah M CO INC | Mckeesport | — | ◐ LIKELY ACTIVE |
| SCStone & CO Inc/charleroi Plt | Charleroi | — | ◐ LIKELY ACTIVE |
| TITechneglas Inc/pittston | Pittston | — | ◐ LIKELY ACTIVE |
| THTerre Hill Concrete Products Plant 1 & 3 | Terre Hill | — | ◐ LIKELY ACTIVE |
| TFTrans Fleet Truck & Equip Painting/collegeville | Collegeville | — | ◐ LIKELY ACTIVE |
| UPUpmc Pinnacle Carlisle/s Middleton Twp | Carlisle | — | ◐ LIKELY ACTIVE |
| ASAction Supply Darby Concrete Facility | Sharon Hill | — | ◇ UNVERIFIED |
| AGAdvanced Glass Sys INC | Trumbauersville | — | ◇ UNVERIFIED |
| APAe Polysilicon CORP. | Fairless Hills | — | ◇ UNVERIFIED |
| AFAgc Flat Glass North America Quakertown Facility | Quakertown | — | ◇ UNVERIFIED |
| AMAliquippa Metal Recovery/slag Processing | Aliquippa | — | ◇ UNVERIFIED |
| ACAls Clnr Svc | Easton | — | ◇ UNVERIFIED |
| AOAmerican Olean Tile | Quakertown | — | ◇ UNVERIFIED |
| AAAnchor an Oldcastle CO | Fredonia | — | ◇ UNVERIFIED |
| AGAnchor Glass Connellsville Plt | Connellsville | — | ◇ UNVERIFIED |
| AGAnchor Glass Container Corp/royersford | Royersford | — | ◇ UNVERIFIED |
| AIAnker Industries | Turtle Creek | — | ◇ UNVERIFIED |
| AGA.p. Green Refractories INC. | Middletown | — | ◇ UNVERIFIED |
| APA P Green Refractories INC Sproul Pa Plant | Sproul | — | ◇ UNVERIFIED |
| AAAustin Assoc Inc/vermiculite Plt | Beaver Falls | — | ◇ UNVERIFIED |
| BVBig Valley Concrete - Mill Creek Facility | Mill Creek | — | ◇ UNVERIFIED |
| BEBloom Engineering CO Inc/baldwin | Pittsburgh | — | ◇ UNVERIFIED |
| BIBpi Inc-greenville Pa Plant | Greenville | — | ◇ UNVERIFIED |
| BIBpi INC - Schenley Pa Plant | Schenley | — | ◇ UNVERIFIED |
| BCBrighton China CO Inc/beaver Falls | Beaver Falls | — | ◇ UNVERIFIED |
| BFBryan Frank, INC. | Pittsburgh | — | ◇ UNVERIFIED |
| BSB S Quarries INC | Montrose | — | ◇ UNVERIFIED |
| BDBulk Dried Materials Llc/hartley St Plt | York | — | ◇ UNVERIFIED |
| BDBulk Dried Materials Llc/workrite Masonry Plt | Thomasville | — | ◇ UNVERIFIED |
| BIBurrell Industries INC. | New Kensington | — | ◇ UNVERIFIED |
| CGCap Glass Allentown Llc/northampton Plt | Northampton | — | ◇ UNVERIFIED |
| CBCastle Bldr Supply New Castle | New Castle | — | ◇ UNVERIFIED |
| CBCastle Builders Supply Indiana Concrete Plt | Penn Run | — | ◇ UNVERIFIED |
| CBCastle Builders Supply Kittanning Concrete Plt | Kittanning | — | ◇ UNVERIFIED |
| CMCertainteed - Mountaintop Facility | Mountain Top | — | ◇ UNVERIFIED |
| CIChromaglass INC | Export | — | ◇ UNVERIFIED |
| CSCollier Stone CO - Mcshane Quarry | Carnegie | — | ◇ UNVERIFIED |
| DCDal-tile CORP Bendersville Plant | Bendersville | — | ◇ UNVERIFIED |
| DCDlubak CORP | Freeport | — | ◇ UNVERIFIED |
| DSDonaldson Supply CO | Canonsburg | — | ◇ UNVERIFIED |
| DCDonegal Crystal USA INC | Jeannette | — | ◇ UNVERIFIED |
