| LSLaurel Sand & Gravel, INC - Laurel | Laurel | MD | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| LBLiller Brothers Asphalt | Cumberland | MD | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| LOLorco of Maryland | Elkton | MD | Petroleum and Coal Products Manufacturing324110 | — | ◇ UNVERIFIED |
| MPMaryland Paving Churchville | Bel Air | MD | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| MMMattern Materials | Boonsboro | MD | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| OBOrigin Baltimore Recycling, LLC | Curtis Bay | MD | Petroleum and Coal Products Manufacturing324110 | — | ◇ UNVERIFIED |
| PFP. Flanigan and Sons, INC - Annapolis Rd | Baltimore | MD | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| SSSafety-kleen Service Center | Silver Spring | MD | Petroleum and Coal Products Manufacturing324191 | — | ◇ UNVERIFIED |
| SASeaboard Asphalt Products Company | Baltimore | MD | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| SGS& G Concrete | Finksburg | MD | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| SSSoil Safe INC | Brandywine | MD | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| BBaltimore | Baltimore | MD | Petroleum and Coal Products Manufacturing324122 | 100-499 | ◐ LIKELY ACTIVE |
| CMC.J. Miller LLC Woodsboro | Woodsboro | MD | Petroleum and Coal Products Manufacturing324121 | 1-19 | ◐ LIKELY ACTIVE |
 M Luis Products LLC | Silver Spring | MD | Petroleum and Coal Products Manufacturing324121 | — | ◐ LIKELY ACTIVE |
| AIAggregate Industries - Kirby Road Asphalt Plant | Clinton | MD | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| AIAggregate Industries - Severn Asphalt | Severn | MD | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| AMAllan Myers Materials-bishop Asphalt | Bishopville | MD | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| AMAllan Myers Materials-eden Asphalt | Eden | MD | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| AMAllan Myers Md, INC. - Jessup Asphalt | Jessup | MD | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| BIBardon, INC. | Clinton | MD | Petroleum and Coal Products Manufacturing324122 | — | ◇ UNVERIFIED |
| BIBardon, INC. Dba Aggregate Industries - Hollywood Asphalt | Hollywood | MD | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| BSBma Services LLC / Morgantown Plant | Newburg | MD | Petroleum and Coal Products Manufacturing324199 | — | ◇ UNVERIFIED |
| BDBramble, David - Massey Plant | Massey | MD | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| CWC. William Hetzer/beaver Creek West | Hagerstown | MD | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| DADavid A. Bramble - Wye Mills | Queenstown | MD | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| DADavid A. Bramble - Wye Mills Plant | Queenstown | MD | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| DDDustins Driveways, LLC | Pasadena | MD | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| FAForestville Asphalt - Darcy Road | Forestville | MD | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| GSGray & Son, INC. - Texas Plant | Cockeysville | MD | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| MPMaryland Paving Rosedale, LLC | Rosedale | MD | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| OCOwens Corning - Jesup Roofing and Asphalt Plant | Jessup | MD | Petroleum and Coal Products Manufacturing324122 | — | ◇ UNVERIFIED |
| PFP. Flanigan and Sons, INC - Annapolis Rd | Baltimore | MD | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| RCReliable Contracting CO. INC. | Waldorf | MD | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| RCReliable Contracting Company, INC. | Annapolis | MD | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| RPRussell Paving Co, INC. | East New Market | MD | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| RSRussell Standard Baltimore | Curtis Bay | MD | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| VMVulcan Materials Company | Odenton | MD | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
