| Business | Phone |
| Zande Environmental Svc Inc 1237 Dublin Rd, Columbus 43215 | (614) 486-4383 |
| Advanced Analytics 1025 Concord Ave, Columbus 43212 | (614) 299-9922 |
| Toxicology Associates Inc 999 Bethel Rd # 3000, Columbus 43214 | (614) 459-2307 |
| Benchmark Environmental Labs 4400 N High St # 207, Columbus 43214 | (614) 267-4588 |
| Silliker Laboratories Of Ohio 2057 Builders Pl, Columbus 43204 | (614) 486-0150 |
| Columbus Water & Chemical Test 4628 Indianola Ave, Columbus 43214 | (614) 262-4372 |
| Concrete Research & Testing 400 Frank Rd, Columbus 43207 | (614) 443-0085 |
| Ncs Corp 1385 W Goodale Blvd, Columbus 43212 | (614) 340-3700 |
| Materials Joining Consultants 790 Morrison Rd, Columbus 43230 | (614) 863-9626 |
| Lankard Materials Lab Inc 400 Frank Rd, Columbus 43207 | (614) 443-3303 |