| Business | Phone |
| Innovative Design & Engrg 981 D St, Hayward 94541 | (510) 690-9900 |
| Quantum Dot Corp 26118 Research Pl, Hayward 94545 | (510) 887-8775 |
| S Gruppe Engineering Llc 29150 Simms Ct, Hayward 94544 | (510) 783-5300 |
| Wrona Structural Engineers 28091 Ziele Creek Dr, Hayward 94542 | (415) 495-8670 |