| Business | Phone |
| Environmental & Occupational 4807 Spicewood Springs Rd 2, Austin 78759 | (512) 418-0351 |
| Lauderdale Environmental Engrg 3804 Cloudy Ridge Rd, Austin 78734 | (512) 266-8933 |
| Trace Analytics Inc 15768 Hamilton Pool Rd, Austin 78738 | (512) 263-0000 |