| Business | Phone |
| Amdl Inc 2492 Walnut Ave # 100, Tustin 92780 | (714) 505-4460 |
| Apria Healthcare 2521 Michelle Dr, Tustin 92780 | (714) 508-3000 |
| B & L Engineering 3002 Dow Ave # 416, Tustin 92780 | (714) 505-9492 |
| Bei Duncan Electronics 15771 Red Hill Ave, Tustin 92780 | (714) 258-7500 |
| Apria Healthcare 2521 Michelle Dr, Tustin 92780 | (714) 626-6040 |