| Business | Phone |
| Dave Olnes Inc 7915 Crest Ave, Oakland 94605 | (510) 568-2162 |
| Diaz Yourman Assoc 300 Lakeside Dr, Oakland 94612 | (510) 628-0700 |
| Don Hillebrandt Assoc 6219 Clive Ave, Oakland 94611 | (510) 531-2655 |
| Earth Mechanics 1727 Martin Luther King Jr Way, Oakland 94612 | (510) 839-0765 |
| Fugro West Inc 1000 Broadway # 200, Oakland 94607 | (510) 268-0461 |
| Fugro West Inc 471 Roland Way, Oakland 94621 | (510) 430-8850 |
| Lowney Associates 167 Filbert St, Oakland 94607 | (510) 267-1970 |
| Psi 4703 Tidewater Ave # B, Oakland 94601 | (510) 434-9200 |
| Rutherford & Chekene 427 13th St, Oakland 94612 | (510) 740-3200 |
| Geolabs Inc 1440 Broadway, Oakland 94612 | (510) 465-5100 |
| Geomatrix Consultants Inc 2101 Webster St # 12, Oakland 94612 | (510) 663-4100 |
| Geosyntec Consultants 475 14th St # 450, Oakland 94612 | (510) 836-3034 |
| Geotrinity Consultants Inc 7770 Pardee Ln # 101, Oakland 94621 | (510) 383-9950 |
| Trans-Pacific Geothermal Corp 111 Broadway # 300, Oakland 94607 | (510) 763-7812 |