| Business | Phone |
| Preston Testing & Engineering 117 Preston Ct, Macon 31210 | (478) 474-2941 |
| Omega Analytical Laboratories 2153 Vineville Ave, Macon 31204 | (478) 745-6624 |
| Morris Testing Laboratories 807 Main St, Macon 31217 | (478) 742-7835 |
| Emsi 2720 Sheraton Dr D, Macon 31204 | (478) 746-5668 |