| Business | Phone |
| California State Employees' 2020 Challenger Dr # 102, Alameda 94501 | (510) 522-4357 |
| Heat & Frost Insulators 1320 Harbor Bay Pkwy, Alameda 94502 | (510) 769-4800 |
| Northern California Surveyors 1620 S Loop Rd, Alameda 94502 | (510) 748-7413 |
| Operating Engineers 1620 S Loop Rd, Alameda 94502 | (510) 748-7400 |