| Business | Phone |
| J & L Environmental Svc 12806 Sutters Ln, Bowie 20720 | (301) 262-4556 |
| National Association-Enviro Po Box 2086, Bowie 20718 | (301) 860-1140 |
| Exponent Inc 4901 Telsa Dr, Bowie 20715 | (301) 464-4060 |
| Fran Stetina Assoc 13108 Idlewild Dr, Bowie 20715 | (301) 262-2687 |