| Business | Phone |
| Damatt Engineering 510 3rd St # 201, Oakland 94607 | (510) 891-0970 |
| F W Assoc Inc 330 Franklin St, Oakland 94607 | (510) 763-7475 |
| Pola Inc 388 17th St, Oakland 94612 | (510) 452-8415 |
| Rey Juachon & Assoc 610 16th St, Oakland 94612 | (415) 252-5677 |
| Susanna Van Leuven 277 5th St, Oakland 94607 | (510) 834-3994 |
| Zeiger Engineers Inc 478 3rd St, Oakland 94607 | (510) 452-9391 |