| Business | Phone |
| Analysts Inc 2910 Ford St, Oakland 94601 | (510) 536-5914 |
| Associated Welding Svc 603 Lancaster St, Oakland 94601 | (510) 865-9323 |
| Construction Testing Svc Oakland 94612 | (510) 444-4747 |
| Matriscope Engineering Lab Inc 436 14th St, Oakland 94612 | (510) 763-3601 |
| Neta 2844 Summit St # 203, Oakland 94609 | (510) 465-5181 |
| Signet Testing Labs Inc 675 Hegenberger Rd # 210, Oakland 94621 | (510) 562-0122 |
| Soil Mechanics Laboratory 8378 Baldwin St # E, Oakland 94621 | (510) 562-7645 |