| Business | Phone |
| Ama Consultants 465 Maltbie St, Lawrenceville 30045 | (770) 822-2532 |
| Wagner Engineering Assoc 381 Pike Blvd # E6, Lawrenceville 30045 | (678) 376-0094 |
| Precision Hydro-Testing Inc 922 Hurricane Shoals Rd Ne, Lawrenceville 30043 | (770) 338-0865 |