| Business | Phone |
| Breakwater Property 27577 Industrial Blvd, Hayward 94545 | (510) 786-9427 |
| Mjb Pipeline 2347 Dunn Rd, Hayward 94545 | (510) 785-5805 |
| Silva's Pipeline Inc 1310 Ruus Ln, Hayward 94544 | (510) 786-2722 |
| Soares Underground Constr 18550 Melrose Ave, Hayward 94541 | (510) 278-7850 |
| Sousa & Sousa 22420 Western Blvd, Hayward 94541 | (510) 581-3066 |