| Business | Phone |
| Athanor Environmental Svc 1386 E Walnut St # 203, Pasadena 91106 | (626) 440-1736 |
| Tetra Tech Inc 3475 E Foothill Blvd, Pasadena 91107 | (626) 351-4664 |
| Audobon California 87 N Raymond Ave, Pasadena 91103 | (626) 564-1300 |
| Tecs Environmental 106 S Mentor Ave # 125, Pasadena 91106 | (626) 396-9424 |