| Business | Phone |
| Summit Testing & Inspection 91 Industrial Dr, Sulphur 70663 | (337) 625-2674 |
| Core Laboratories Inc 4025 N Oak Ln A, Sulphur 70665 | (337) 583-4927 |
| Techweld Inc 2508 E Napoleon St, Sulphur 70663 | (337) 626-0101 |
| Gulf Coast Analytical Labs 2120 E Napoleon St, Sulphur 70663 | (337) 439-5000 |
| Trent Severn Laboratories 2822 S Beglis Pkwy, Sulphur 70665 | (337) 527-7447 |