| Business | Phone |
| Coe Management Group Inc 1386 Westgate Center Dr, Winston Salem 27103 | (336) 768-8104 |
| Independent Testing Labs Inc 440 Brookstown Ave, Winston Salem 27101 | (336) 724-1519 |
| En-Cas Analytical Labs 2359 Farrington Point Dr, Winston Salem 27107 | (336) 785-3252 |
| Ess Laboratories 3917 Westpoint Blvd # E, Winston Salem 27103 | (336) 659-3378 |