| Business | Phone |
| Lawrance Engineering 12500 Schroeder Rd, Dallas 75243 | (972) 497-9106 |
| Environmental Testing Lab 11034 Indian Trl, Dallas 75229 | (972) 247-9657 |
| Geoscience Engineering 2712 Satsuma Dr 400, Dallas 75229 | (972) 488-3500 |
| Xenco Laboratories 11078 Morrison Ln # D, Dallas 75229 | (972) 481-9999 |
| Ccas Inc 11140 Petal St 250, Dallas 75238 | (214) 221-2786 |
| Psychemedics Corp 17000 Dallas Pkwy 223, Dallas 75248 | (972) 490-8001 |
| Pharmaceutical Testing Lab 1515 W Mockingbird Ln 115, Dallas 75235 | (214) 905-1100 |
| Qte Group Inc 9200 King Arthur Dr, Dallas 75247 | (214) 678-0227 |
| Microconsult Inc 17818 Davenport Rd 118, Dallas 75252 | (972) 250-2902 |
| Dallas Laboratories Inc 1323 Wall St, Dallas 75215 | (214) 421-1400 |
| Psi Dallas East 8601 Forney Rd, Dallas 75227 | (469) 235-1121 |
| Qore Property Sciences 12801 N Stemmons Fwy, Dallas 75234 | (972) 247-7229 |
| Forensic Recovery Group Inc 5400 Lbj Fwy 935, Dallas 75240 | (972) 960-3226 |