| Business | Phone |
| R L Segar 11615 Forest Central Dr 201, Dallas 75243 | (214) 341-6006 |
| Samuels Consultants 9115 Drumcliffe Ln, Dallas 75231 | (214) 348-3859 |
| Seismic Solutions Inc 4925 Greenville Ave, Dallas 75206 | (972) 772-4810 |
| Todd Stallings 5646 Milton St, Dallas 75206 | (214) 987-9187 |
| T H Quest 6060 N Central Expy # 560, Dallas 75206 | (214) 363-3889 |
| Bell-Murphy & Assoc Inc 5310 Harvest Hill Rd 139, Dallas 75230 | (972) 386-0252 |
| R E Brannian 2525 Turtle Creek Blvd, Dallas 75219 | (214) 748-2606 |
| Prospect Geoscience Inc 4100 Mcewen Rd, Dallas 75244 | (972) 991-9697 |