| RRRock Recycle Company | Sebastopol | CA | Nonmetallic Mineral Product Manufacturing327332 | — | ◇ UNVERIFIED |
| RCRsh Construction | Livermore | CA | Nonmetallic Mineral Product Manufacturing327332 | — | ◇ UNVERIFIED |
| SJSan Jose Concrete Pipe CO INC | San Jose | CA | Nonmetallic Mineral Product Manufacturing327332 | — | ◇ UNVERIFIED |
| SPSchier Products Company | Kansas City | KS | Nonmetallic Mineral Product Manufacturing327332 | — | ◇ UNVERIFIED |
| SWSouth West Concrete Products | Ontario | CA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| SCStar Concrete | Gilroy | CA | Nonmetallic Mineral Product Manufacturing327332 | — | ◇ UNVERIFIED |
| SPStarks Pipe CO | Almo | KY | Nonmetallic Mineral Product Manufacturing327332 | — | ◇ UNVERIFIED |
| SPStructural Plank Industries INC Deer Trail Facility | Sebring | FL | Nonmetallic Mineral Product Manufacturing327332 | — | ◇ UNVERIFIED |
| TSThe Stresscrete Group | Atchison | KS | Nonmetallic Mineral Product Manufacturing327332 | — | ◇ UNVERIFIED |
| TPThompson Pipe Group INC | Rialto | CA | Nonmetallic Mineral Product Manufacturing327332 | — | ◇ UNVERIFIED |
| TPThompson Pipe Group, INC | Grand Prairie | TX | Nonmetallic Mineral Product Manufacturing327332 | — | ◇ UNVERIFIED |
| TPThompson Pipe Group Pressure, INC. | Lubbock | TX | Nonmetallic Mineral Product Manufacturing327332 | — | ◇ UNVERIFIED |
| TOTrb Oilfield Services, INC. | Bakersfield | CA | Nonmetallic Mineral Product Manufacturing327332 | — | ◇ UNVERIFIED |
| TSTriple S Well Boring Machine, INC. | Catawba | NC | Nonmetallic Mineral Product Manufacturing327332 | — | ◇ UNVERIFIED |
| UPUpper Peninsula Concrete Pipe CO | Escanaba | MI | Nonmetallic Mineral Product Manufacturing327332 | — | ◇ UNVERIFIED |
| VPVillalobos - Portable Concrete Plant | Commerce City | CO | Nonmetallic Mineral Product Manufacturing327332 | — | ◇ UNVERIFIED |
| VNV & N Concrete Products, INC. | Romeoville | IL | Nonmetallic Mineral Product Manufacturing327332 | — | ◇ UNVERIFIED |
| WSWa317947321 - Spokane Wilbert Vault CO | Spokane | WA | Nonmetallic Mineral Product Manufacturing327332 | — | ◇ UNVERIFIED |
| WCWahoo Concrete-bethany | Bethany | MO | Nonmetallic Mineral Product Manufacturing327332 | — | ◇ UNVERIFIED |
| WPWilbert Precast CO | Moses Lake | WA | Nonmetallic Mineral Product Manufacturing327332 | — | ◇ UNVERIFIED |
| WPWilbert Precast CO | Spokane | WA | Nonmetallic Mineral Product Manufacturing327332 | — | ◇ UNVERIFIED |
