| Business | Phone |
| Alameda Corridor Engineering 1 Civic Plaza Dr # 600, Carson 90745 | (310) 816-0460 |
| Chin Engineering 22009 Newkirk Ave, Carson 90745 | (310) 782-0035 |
| Margate Construction Inc 25007 Figueroa St, Carson 90745 | (310) 830-8610 |
| Gary Kanda & Assoc 24331 Wilmington Ave, Carson 90745 | (310) 549-7100 |
| Grankol Inc 1210 E 223rd St # 318, Carson 90745 | (310) 549-3011 |