| Business | Phone |
| D J Engineering Svc 2024 Pacific Ave, San Leandro 94577 | (510) 351-1394 |
| Delphic Engineering Inc 1919 Republic Ave, San Leandro 94577 | (510) 352-6317 |
| Emerald Construction Co 14721 Van Ave, San Leandro 94578 | (510) 351-4490 |
| Manos Construction 857 Estabrook St, San Leandro 94577 | (510) 352-9507 |