| Business | Phone |
| Brittell Environmental Corp 60 Hegenberger Loop, Oakland 94621 | (510) 614-1642 |
| Environment & Technology Svc 4690 Tompkins Ave, Oakland 94619 | (510) 482-6230 |
| Morgan Environmental Svc 1233 21st St, Oakland 94607 | (510) 267-0134 |
| World Environmental & Energy 6233 San Leandro St, Oakland 94621 | (510) 568-6732 |