| Business | Phone |
| Dominion Geotechnical Svc Inc 5110 Southpoint Pkwy, Fredericksburg 22407 | (540) 710-1218 |
| Froehling & Robertson 10909 Houser Dr, Fredericksburg 22408 | (540) 891-2771 |
| Soil Consultants Engrg Inc 8511 Indian Hills Ct, Fredericksburg 22407 | (540) 710-7645 |