| 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 |
| WIWpw Industries INC | Streator | IL | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| RRRhi Refractories - Indian Hill | Ione | CA | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| 5H58789 - Harbisonwalker International INC | South Shore | KY | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| ABAcme Brick | Fort Smith | AR | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| ABAcme Brick Bridgeport Plant | Bridgeport | TX | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| ABAcme Brick-clarksville Plant | Clarksville | AR | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| ABAcme Brick Company | Castle Rock | CO | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| ABAcme Brick - Texas Clay Plants | Malakoff | TX | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| ABAcme Brick Tile & Stone Birmingham Plant | Leeds | AL | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| ABAcme Brick-weir Plant | Weir | KS | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| ARAdvanced Refractory Technologies | Carnegie | PA | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
 Allied Mineral Products | Anniston | AL | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| ARAlsey Refractories CO | Alsey | IL | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| ABAmerican Bullnose Company of Texas LLC | Dallas | TX | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| ACAmerican Clay Enterprises | Albuquerque | NM | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| ACAmerican Colloid Company | Pickett | WI | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| AEAmerican Eagle Brick CO | Sunland Park | NM | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| ARAnh Refractories CO. INC. | Fulton | MO | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| ACApplied Ceramics INC | Fremont | CA | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| AFAthens Facility | Athens | TX | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| BBBelden Brick | Sugarcreek | OH | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
