| Business | Phone |
| Tetra Tech Ec Oak Harbor 98277 | (360) 240-8526 |
| Cascade Environmental Mgmt Oak Harbor 98277 | (360) 279-9005 |
| Chugach Development Corp 371 Midway St, Oak Harbor 98278 | (360) 675-5668 |
| Earthworks Environmental 494 Meadowview Ln, Oak Harbor 98277 | (360) 679-3635 |