| Business | Phone |
| Applied Technical Svc Inc 1325 Cavalier Blvd B, Chesapeake 23323 | (757) 558-0016 |
| Sampling Associates Intl 4669 Helensburgh Dr, Chesapeake 23321 | (757) 483-5510 |
| Mc Callum Testing Laboratories 1808 Hayward Ave, Chesapeake 23320 | (757) 420-2520 |