| Business | Phone |
| Air Tech Environmental 3216 S Alston Ave, Durham 27713 | (919) 544-6338 |
| Allen Consulting & Engineering 12 Jua Vly, Durham 27707 | (919) 401-5573 |
| Amec Earth Environmental Svs 811 Angier Ave, Durham 27701 | (919) 688-9407 |
| William Moore & Assoc Inc 5016 Lansdowne Dr, Durham 27712 | (919) 383-3637 |
| Bensinger 1426 E Nc Highway 54, Durham 27713 | (919) 484-8536 |
| Tempest Environmental Systems 101 W Markham Ave, Durham 27701 | (919) 688-1460 |
| Southern Site & Environ Corp 6308 Mount Hermon Church Rd, Durham 27705 | (919) 596-6159 |
| Spectral Insites 214 Argonne Dr, Durham 27704 | (919) 620-6549 |
| Steag 11 Gray Fox Ct, Durham 27713 | (919) 490-9003 |
| Sherrill Environmental Inc 3326 Rugby Rd, Durham 27707 | (919) 493-6555 |
| Skt Consulting Svc 3819 Berini Dr, Durham 27705 | (919) 383-8400 |
| Abacus Consulting 4126 Livingstone Pl, Durham 27707 | (919) 489-2315 |