| Business | Phone |
| Environmental Health Screening 327 County Fair Dr, Houston 77060 | (281) 447-5536 |
| Krueger Engineering & Mfg Co 12001 Hirsch Rd, Houston 77050 | (281) 442-2537 |
| Novus Systems Inc 5900 Haynesworth Ln, Houston 77034 | (281) 922-1000 |
| Tillman & Assoc Inc 12520 Taylor Rd, Houston 77041 | (713) 983-8488 |
| Willbanks & Assoc 6610 Stillwell St, Houston 77087 | (713) 640-2773 |