| CSClarion Sintered Metals | Ridgway | PA | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| CMClearfield Mach Co/3rd & Everett Streets | Clearfield | PA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| CFCol Fin Specialty Steel Mfg | New Brighton | PA | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| CSCommercial Steel Corporation | Glassport | PA | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| CCContech Const Prod - Greencastle | Greencastle | PA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| CICooper Ind/corry Plt | Corry | PA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| DBDamascus Bishop Tube/greenville | Greenville | PA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| DDDemorah Drive Associates | Montgomeryville | PA | Primary Metal Manufacturing331423 | — | ◇ UNVERIFIED |
| DMDent Mfg CO Inc/northampton | Northampton | PA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| DCDomestic Casting CO LLC | Shippensburg | PA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| DIDonsco INC Building 8 | Belleville | PA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| DIDynamet INC N Main St Fac | Washington | PA | Primary Metal Manufacturing331491 | — | ◇ UNVERIFIED |
| EIEafco INC | Boyertown | PA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| EBEagle Brass Company | Leesport | PA | Primary Metal Manufacturing331421 | — | ◇ UNVERIFIED |
| EEEdward E Goldberg & Sons | Philadelphia | PA | Primary Metal Manufacturing331314 | — | ◇ UNVERIFIED |
| EFEffort Foundry Inc/bath | Bath | PA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| EREllwood Remelt Steel Proposed Var/esr Facility | New Castle, City of | PA | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
 Embassy Powdered Metals/emporium | Emporium | PA | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| EMEphrata Mfg Co/ephrata | Ephrata | PA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| ESEsab Site at Sandvik Smt | Clarks Summit | PA | Primary Metal Manufacturing331222 | — | ◇ UNVERIFIED |
| ETExide Technologies - Reading Smelter Div | Reading | PA | Primary Metal Manufacturing331492 | — | ◇ UNVERIFIED |
| ETExide Technologies Site | Laureldale | PA | Primary Metal Manufacturing331492 | — | ◇ UNVERIFIED |
| FHFairless Hills Steam Generating Sta | Fairless Hills | PA | Primary Metal Manufacturing331111 | — | ◇ UNVERIFIED |
| FSFranklin Smelting & Refining CORP | Philadelphia | PA | Primary Metal Manufacturing331000 | — | ◇ UNVERIFIED |
| FAFreedom Alloys INC | Royersford | PA | Primary Metal Manufacturing331420 | — | ◇ UNVERIFIED |
| GWGamesa Wind/fairless Hills Wind Turbine Nacelle Mfg | Fairless Hills | PA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| GIGarfield Industries | Philadelphia | PA | Primary Metal Manufacturing331419 | — | ◇ UNVERIFIED |
| GFGettysburg Foundry Spec Mfg | Gettysburg | PA | Primary Metal Manufacturing331492 | — | ◇ UNVERIFIED |
| GSGkn Sinter Metals - Emporium Boro Plant 2 | Emporium | PA | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| GIGottlieb INC | Neville Island | PA | Primary Metal Manufacturing331314 | — | ◇ UNVERIFIED |
| HPHalpern Processing INC. | Philadelphia | PA | Primary Metal Manufacturing331000 | — | ◇ UNVERIFIED |
| HLHanover Lantern Inc/kindig Ln | Hanover | PA | Primary Metal Manufacturing331316 | — | ◇ UNVERIFIED |
| HCHazleton Casting CO | Hazleton | PA | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| HCHazleton Casting CO Llc/hazleton | Hazleton | PA | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| HPHi-tech Plating | Erie | PA | Primary Metal Manufacturing331112 | — | ◇ UNVERIFIED |
| HZHorsehead Zinc Powders LLC | Monaca | PA | Primary Metal Manufacturing331410 | — | ◇ UNVERIFIED |
| HPHyde Park Foundry | Hyde Park | PA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| ICImperial Cleaners & Tailors/washington | Washington | PA | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| IMImperial Metal & Chemical CO | Philadelphia | PA | Primary Metal Manufacturing331491 | — | ◇ UNVERIFIED |
| JSJ&l Structural Aliquippa Div | Aliquippa | PA | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| JMJohn Maneely CO Wheatland Tube Div - Mill Street | Sharon | PA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| JSJohnstown Specialty Casting/johnstown Foundry | Johnstown | PA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| KIKennametal Inc/colerain Twp Bedford Cast | Bedford | PA | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| KIKennametal INC - Kingston Plant | Latrobe | PA | Primary Metal Manufacturing331491 | — | ◇ UNVERIFIED |
| KIKennametal Isa | New Castle | PA | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| KRKeystone Resources | Mars | PA | Primary Metal Manufacturing331000 | — | ◇ UNVERIFIED |
 Koehler Bright Star/hanover Twp | Wilkes Barre | PA | Primary Metal Manufacturing331421 | — | ◇ UNVERIFIED |
| LFLeed Foundry Inc/st Clair | Saint Clair | PA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| MUMarcegaglia USA | Greenville | PA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| MRMaterials Recovery Technologies | York | PA | Primary Metal Manufacturing331492 | — | ◇ UNVERIFIED |
