| Business | Phone |
| American Screening 6658 Youree Dr 180 Pmb 404, Shreveport 71105 | (318) 227-4994 |
| Construction Testing Lab Inc 903 Crabapple Dr, Shreveport 71118 | (318) 686-6035 |
| Earth Materials Testing Svc 8120 Mansfield Rd, Shreveport 71108 | (318) 687-6337 |
| Tetra Tech 7222 Greenwood Rd, Shreveport 71119 | (318) 636-3673 |
| North La Criminalistics Lab 1115 Brooks St, Shreveport 71101 | (318) 227-2889 |
| Team Industrial Svc 5150 Interstate Dr 207b, Shreveport 71109 | (318) 636-4456 |
| Teco Testing 9015 Newcastle Dr, Shreveport 71129 | (318) 686-4798 |
| Teco Testing 1725 N Hearne Ave, Shreveport 71107 | (318) 965-9650 |