| HWHarbison Walker International-chlorinator | Claysburg | PA | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| HPHarmar Plt | Cheswick | PA | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| HBHiggins Brick CO | Chino Hills | CA | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| HCHowmet Castings & Services INC | Morristown | TN | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| ICInternational Chimney CORP | Kittanning | PA | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| JBJenkins Brick Company | Coosada | AL | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| KCKasten Clay Products Co-jackson | Jackson | MO | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| KMKrosaki Magnesita Refractories | York | PA | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| LBLouisville Brick Company | Louisville | MS | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| LFLouisville Fire Brick Wks | Grahn | KY | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| LFLouisville Fire Brick Works | Grahn | KY | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| MMagneco | Addison | IL | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| MIMetric, INC. (jan Nylund) | Tampa | FL | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| MCMiller & CO | Seneca | IL | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| MIMinteq International INC Zedmark Div | Dover | OH | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| MIMinteq Intl INC | Bryan | OH | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| MCMission Clay Products | Pittsburg | KS | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| MCMorganite Crucible | North Haven | CT | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| MBMorin Brick Company | Gorham | ME | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| MSMt Savage Specialty Refractories | Mount Savage | MD | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| NRNational Refractories & Minerals CORP. | Wellsville | MO | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| NANorth American Refractories (narco) | Gary | IN | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| OCOld Carolina Brick Gold Hill | Gold Hill | NC | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| OCOld Colonial Brick LLC | Corinth | MS | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| OVOld Virginia Brick CO | Madison Heights | VA | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| OBOmnisource- Bessemer Plant 5 | Bessemer | AL | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| PHPine Hall Brick Co., INC. - Plant #7 | Fairmount | GA | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| PSPrecasting Site | Jacksonville | AL | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| PGPryor Giggey CO | Chehalis | WA | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| PCPyrotek Carlisle Nonclay Refractory Mfg | Carlisle | PA | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| PIPyrotek INC | Carlisle | PA | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| RRRath Refractories | Milledgeville | GA | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| RPResco Products INC | Santa Fe Spgs | CA | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| RPResco Products, INC. - United Refractories | Warren | OH | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| RMRichland Moulded Brick CO | Mansfield | OH | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| RCRichtex Corporation Ninety Six Plant 9 | Ninety Six | SC | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| RMRinker Materials - Concrete Pipe Div | Diamond | OH | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| RTRipon Truck Repair & Equipment Llc-cs301 | Pickett | WI | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| SCSaint-gobain Ceramics/latrobe Plt | Latrobe | PA | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| SJScott Jewett Truck Line INC | Mangum | OK | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| STSeneca Tiles INC | Attica | OH | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| SIServsteel Inc/morgan | Morgan | PA | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| SSSheridan Supply CO - Newmanstown | Newmanstown | PA | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| SCStone Creek Brick CO | Stone Creek | OH | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| UIUni-ref INC | Sharonville | OH | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| UMUniversal Materials INC | Mogadore | OH | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| UIUst, INC. | Mount Pleasant | TN | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| VUVesuvius USA -tyler Plant | Tyler | TX | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| WGWienerberger Group (general Shale) | Beltsville | MD | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| WPWonder Porcelain Group, LLC Co-located Site: Nashville Ready Mix Mobile | Lebanon | TN | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
