| Business | Phone |
| Martel Laboratories Jds Inc 1025 Cromwell Bridge Rd, Baltimore 21286 | (410) 825-7790 |
| Maryland Spectral Svc 1500 Caton Center Dr # G, Baltimore 21227 | (410) 247-7600 |
| Baltimore Testing Laboratory 1407 Bare Hills Ave, Baltimore 21209 | (410) 825-4130 |
| Carnegie Institution-Wa Dept 116 W University Pkwy, Baltimore 21210 | (410) 554-1200 |
| Met Laboratories Inc 914 W Patapsco Ave, Baltimore 21230 | (410) 354-6219 |
| Powell Labs Ltd 1915 Aliceanna St, Baltimore 21231 | (410) 558-3540 |
| Sgs Minerals Svc 1501 E Patapsco Ave # A, Baltimore 21226 | (410) 355-1958 |
| In Vitro Technologies 1450 S Rolling Rd, Baltimore 21227 | (410) 455-1242 |