| Business | Phone |
| Appeals Board Cal-Osha 100 N Barranca St # 410, West Covina 91791 | (626) 332-1145 |
| Occupational Safety & Health 1906 W Garvey Ave S # 200, West Covina 91790 | (626) 472-0046 |
| Equalization Board 1521 W Cameron Ave # 300, West Covina 91790 | (626) 480-7200 |